JSON binding of IODEF
draft-ietf-mile-jsoniodef-04
The information below is for an old version of the document.
Document | Type |
This is an older version of an Internet-Draft that was ultimately published as RFC 8727.
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Authors | Takeshi Takahashi , Roman Danyliw , Mio Suzuki | ||
Last updated | 2018-07-17 | ||
Replaces | draft-takahashi-mile-jsoniodef | ||
RFC stream | Internet Engineering Task Force (IETF) | ||
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by Robert Sparks
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Additional resources | Mailing list discussion | ||
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IESG | IESG state | Became RFC 8727 (Proposed Standard) | |
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draft-ietf-mile-jsoniodef-04
MILE T. Takahashi Internet-Draft NICT Intended status: Standards Track R. Danyliw Expires: January 18, 2019 CERT M. Suzuki NICT July 17, 2018 JSON binding of IODEF draft-ietf-mile-jsoniodef-04 Abstract RFC7970 specified an information model and a corresponding XML data model for exchanging incident and indicator information. This draft provides an alternative data model implementation in JSON. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on January 18, 2019. Copyright Notice Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Takahashi, et al. Expires January 18, 2019 [Page 1] Internet-Draft JSON-IODEF July 2018 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3 2. IODEF Data Types . . . . . . . . . . . . . . . . . . . . . . 3 2.1. Abstract Data Type to JSON Data Type Mapping . . . . . . 3 2.2. Complex JSON Types . . . . . . . . . . . . . . . . . . . 4 2.2.1. Multilingual Strings . . . . . . . . . . . . . . . . 4 2.2.2. Software and SoftwareReference . . . . . . . . . . . 5 2.2.3. StructuredInfo . . . . . . . . . . . . . . . . . . . 5 2.2.4. EXTENSION . . . . . . . . . . . . . . . . . . . . . . 6 3. IODEF JSON Data Model . . . . . . . . . . . . . . . . . . . . 6 3.1. Classes and Elements . . . . . . . . . . . . . . . . . . 6 3.2. Mapping between JSON and XML IODEF . . . . . . . . . . . 16 4. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.1. Minimal Example . . . . . . . . . . . . . . . . . . . . . 17 4.2. Indicators from a Campaign . . . . . . . . . . . . . . . 18 5. The IODEF Data Model (CDDL) . . . . . . . . . . . . . . . . . 20 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 35 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 35 8. Security Considerations . . . . . . . . . . . . . . . . . . . 35 9. Normative References . . . . . . . . . . . . . . . . . . . . 35 Appendix A. The IODEF Data Model (JSON Schema) . . . . . . . . . 35 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 55 1. Introduction [RFC7970] defines a data representation for security incident reports and indicators commonly exchanged by operational security teams. It facilitates the automated exchange of this information to enable mitigation and watch-and-warning. Section 3 of [RFC7970] defined an information model using Unified Modeling Language (UML) and a corresponding Extensible Markup Language (XML) schema data model in Section 8. This UML-based information model and XML-based data model are referred to as IODEF UML and IODEF XML, respectively in this document. This document defines an alternate implementation of the IODEF UML information model by specifying a JavaScript Object Notation (JSON) data model using JSON Schema [jsonschema]. This JSON data model is referred to as IODEF JSON in this document. IODEF JSON provides all of the expressivity of IODEF XML. It gives implementers and operators an alternative format to exchange the same information. Takahashi, et al. Expires January 18, 2019 [Page 2] Internet-Draft JSON-IODEF July 2018 The normative IODEF JSON data model is found in Section 5. Section 2 and Section 3 describe the data types and elements of this data model. Section 4 provides examples. 1.1. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119]. 2. IODEF Data Types The abstract IODEF JSON implements the abstract data types specified in Section 2 of [RFC7970]. 2.1. Abstract Data Type to JSON Data Type Mapping IODEF JSON uses native and derived JSON data types. Figure 1 describes the mapping between the abstract data types in Section 2 of [RFC7970] and their corresponding implementations in IODEF JSON. Takahashi, et al. Expires January 18, 2019 [Page 3] Internet-Draft JSON-IODEF July 2018 +-----------------+-------------------+-------------------------------+ | IODEF Data Type | [RFC7970] | JSON Data Type | | | Reference | | +-----------------+-------------------+-------------------------------+ | INTEGER | Section 2.1 | "integer" per [jsonschema] | | REAL | Section 2.2 | "number" per [jsonschema] | | CHARACTER | Section 2.3 | "string" per [jsonschema] | | STRING | Section 2.3 | "string" per [jsonschema] | | ML_STRING | Section 2.4 | see Section 2.2.1 | | BYTE | Section 2.5.1 | "string" per [jsonschema] | | BYTE[] | Section 2.5.1 | "string" per [jsonschema] | | HEXBIN | Section 2.5.2 | "string" per [jsonschema] | | HEXBIN[] | Section 2.5.2 | "string" per [jsonschema] | | ENUM | Section 2.6 | "enum" array per [jsonschema] | | DATETIME | Section 2.7 | "string" per [jsonschema] | | TIMEZONE | Section 2.8 | "string" per [jsonschema] | | PORTLIST | Section 2.9 | "string" per [jsonschema] | | POSTAL | Section 2.10 | "string" per [jsonschema] | | POSTAL_ML | Section 2.10 | see ML_STRING, Section 2.2.1 | | PHONE | Section 2.11 | "string" per [jsonschema] | | EMAIL | Section 2.12 | "string" per [jsonschema] | | URL | Section 2.13 | "string" per [jsonschema] | | ID | Section 2.14 | "string" per [jsonschema] | | IDREF | Section 2.14 | "string" per [jsonschema] | | SOFTWARE | Section 2.15 | see Section 2.2.2 | | STRUCTURED | RFC 7213 | see Section 2.2.3 | | EXTENSION | Section 2.16 | see Section 2.2.4 | +-----------------+-------------------+-------------------------------+ Figure 1 2.2. Complex JSON Types 2.2.1. Multilingual Strings A string that needs to be represented in a human-readable language different than the default encoding of the document is represented in the information model by the ML_STRING data type. This data type is implemented as an object with "value", "lang", and "translation-id" elements as defined in Section 5. Examples are shown below. "MLStringType": { "value": "free-form text", //STRING "lang": "en", //ENUM "translation-id": "jp2en0023" //STRING } Takahashi, et al. Expires January 18, 2019 [Page 4] Internet-Draft JSON-IODEF July 2018 2.2.2. Software and SoftwareReference A particular version of software is represented in the information model by the SOFTWARE data type. This software can be described by using a reference, a URL, or with free-form text. The SOFTWARE data type is implemented as an object with "SoftwareReference", "URL", "Description", and "Description_ML" elements as defined in Section 5. Examples are shown below. "SoftwareType": { "SoftwareReference": {...}, //SoftwareReference "Description": ["MS Windows"] //STRING } SoftwareReference class is a reference to a particular version of software. Examples are shown below. "SoftwareReference": { "value": "cpe:/a:google:chrome:59.0.3071.115 ", //STRING "spec-name": "cpe", //ENUM "dtype": "string", //ENUM } 2.2.3. StructuredInfo Information provided in a form of structured string, such as ID, or structured information, such as XML documents, is represented in the information model by the StructuredInfo data type. Note that this type was originally specified in RFC7203. The StructuredInfo data type is implemented as an object with "SpecID", "ext-SpecID", "ContentID", "RawData", "Reference" elements. An example for embedding a structured ID is shown below. "StructuredInformation": { "SpecID": "cve", //ENUM "ContentID": "CVE-2007-5000" //STRING } When embedding the raw data, base64 conversion should be used for encoding the data, as shown below. "StructuredInformation": { "SpecID": "oval", //ENUM "RawData": "<<<strings encoded with base64>>>" //BYTE } Takahashi, et al. Expires January 18, 2019 [Page 5] Internet-Draft JSON-IODEF July 2018 2.2.4. EXTENSION Information not otherwise represented in the IODEF can be added using the EXTENSION data type. This data type is a generic extension mechanism. The EXTENSION data type is implemented as an ExtensionType object with "value", "name", "dtype", "ext-dtype", "meaning", "formatid", "restriction", "ext-restriction", and "observable-id" elements. An example for embedding a structured ID is shown below. "ExtensionType": { "value": "xxxxxxx", //String "name": "Syslog", //String "dtype": "string", //String "meaning": "Syslog from the security appliance X", //String } 3. IODEF JSON Data Model 3.1. Classes and Elements The following table shows the list of IODEF Classes, their elements, and the corresponding section in [RFC7970]. Note that the complete JSON schema is defined in Section 5. +-----------------------------+--------------------+---------------+ | IODEF Class | Class | Corresponding | | | Elements and | Section | | | Attribute | in [RFC7970] | +-----------------------------+--------------------+---------------+ | IODEF-Document | version | 3.1 | | | lang? | | | | format-id? | | | | private-enum-name? | | | | private-enum-id? | | | | Incident+ | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | Incident | purpose | 3.2 | | | ext-purpose? | | | | status? | | | | ext-status? | | | | lang? | | | | restriction? | | | | ext-restriction? | | | | observable-id? | | | | IncidentID | | | | AlternativeID? | | Takahashi, et al. Expires January 18, 2019 [Page 6] Internet-Draft JSON-IODEF July 2018 | | RelatedActivity* | | | | DetectTime? | | | | StartTime? | | | | EndTime? | | | | RecoveryTime? | | | | ReportTime? | | | | GenerationTime | | | | Description* | | | | Description_ML* | | | | Discovery* | | | | Assessment* | | | | Method* | | | | Contact+ | | | | EventData* | | | | Indicator* | | | | History? | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | IncidentID | id | 3.4 | | | name | | | | instance? | | | | restriction? | | | | ext-restriction? | | +-----------------------------+--------------------+---------------+ | AlternativeID | restriction? | 3.5 | | | ext-restriction? | | | | IncidentID+ | | +-----------------------------+--------------------+---------------+ | RelatedActivity | restriction? | 3.6 | | | ext-restriction? | | | | IncidentID* | | | | URL* | | | | ThreatActor* | | | | Campaign* | | | | IndicatorID* | | | | Confidence? | | | | Description* | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | ThreatActor | restriction? | 3.7 | | | ext-restriction? | | | | ThreatActorID* | | | | URL* | | | | Description* | | | | Description_ML* | | | | AdditionalData* | | +-----------------------------+--------------------+---------------+ | Campaign | restriction? | | Takahashi, et al. Expires January 18, 2019 [Page 7] Internet-Draft JSON-IODEF July 2018 | | ext-restriction? | | | | CampaignID* | | | | URL* | | | | Description* | | | | Description_ML* | | | | AdditionalData* | 3.8 | +-----------------------------+--------------------+---------------+ | Contact | role | | | | ext-role? | | | | type | | | | ext-type? | | | | restriction? | | | | ext-restriction? | | | | ContactName*, | | | | ContactName_ML*, | | | | ContactTitle* | | | | ContactTitle_ML* | | | | Description* | | | | Description_ML* | | | | RegistryHandle* | | | | PostalAddress* | | | | Email* | | | | Telephone* | | | | Timezone? | | | | Contact* | | | | AdditionalData* | 3.9 | +-----------------------------+--------------------+---------------+ | RegistryHandle | handle | | | | registry | | | | ext-registry? | 3.9.1 | +-----------------------------+--------------------+---------------+ | PostalAddress | type? | | | | ext-type? | | | | PAddress | | | | Description* | | | | Description_ML* | 3.9.2 | +-----------------------------+--------------------+---------------+ | Email | type? | | | | ext-type? | | | | EmailTo | | | | Description* | | | | Description_ML* | 3.9.3 | +-----------------------------+--------------------+---------------+ | Telephone | type? | | | | ext-type? | | | | TelephoneNumber | | | | Description* | | | | Description_ML* | 3.9.4 | Takahashi, et al. Expires January 18, 2019 [Page 8] Internet-Draft JSON-IODEF July 2018 +-----------------------------+--------------------+---------------+ | Discovery | source? | | | | ext-source? | | | | restriction? | | | | ext-restriction? | | | | Description* | | | | Description_ML* | | | | Contact* | | | | DetectionPattern* | 3.10 | +-----------------------------+--------------------+---------------+ | DetectionPattern | restriction? | 3.10.1 | | | ext-restriction? | | | | observable-id? | | | | Application | | | | Description* | | | | Description_ML* | | | | DetectionConfiguration* | | +-----------------------------+--------------------+---------------+ | Method | restriction? | | | | ext-restriction? | | | | Reference* | | | | Description* | | | | Description_ML* | | | | AttackPattern* | | | | Vulnerability* | | | | Weakness* | | | | AdditionalData* | 3.11 | +-----------------------------+--------------------+---------------+ | Reference | observable-id? | | | | ReferenceName? | | | | URL* | | | | Description* | | | | Description_ML* | 3.11.1 | +-----------------------------+--------------------+---------------+ | Assessment | occurence? | | | | restriction? | | | | ext-restriction? | | | | observable-id? | | | | IncidentCategory* | | | | SystemImpact* | | | | BusinessImpact* | | | | TimeImpact* | | | | MonetaryImpact* | | | | IntendedImpact* | | | | Counter* | | | | MitigatingFactor* | | | | MitigatingFactor_ML*| | | | Cause* | | Takahashi, et al. Expires January 18, 2019 [Page 9] Internet-Draft JSON-IODEF July 2018 | | Cause_ML* | | | | Confidence? | | | | AdditionalData* | 3.12 | +-----------------------------+--------------------+---------------+ | SystemImpact | severity? | | | | completion? | | | | type | | | | ext-type? | | | | Description* | | | | Description_ML* | 3.12.1 | +-----------------------------+--------------------+---------------+ | BusinessImpact | severity? | | | | ext-severity? | | | | type | | | | ext-type? | | | | Description* | | | | Description_ML* | 3.12.2 | +-----------------------------+--------------------+---------------+ | TimeImpact | value | | | | severity? | | | | metric | | | | ext-metric? | | | | duration? | | | | ext-duration? | 3.12.3 | +-----------------------------+--------------------+---------------+ | MonetaryImpact | value | | | | severity? | | | | currency? | 3.12.4 | +-----------------------------+--------------------+---------------+ | Confidence | value | | | | rating | | | | ext-rating? | 3.12.5 | +-----------------------------+--------------------+---------------+ | History | restriction? | | | | ext-restriction? | | | | HistoryItem+ | 3.13 | +-----------------------------+--------------------+---------------+ | HistoryItem | action | | | | ext-action? | | | | restriction? | | | | ext-restriction? | | | | observable-id? | | | | DateTime | | | | IncidentID? | | | | Contact? | | | | Description* | | | | Description_ML* | | | | DefinedCOA* | | Takahashi, et al. Expires January 18, 2019 [Page 10] Internet-Draft JSON-IODEF July 2018 | | AdditionalData* | 3.13.1 | +-----------------------------+--------------------+---------------+ | EventData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | Description* | | | | Description_ML* | | | | DetectTime? | | | | StartTime? | | | | EndTime? | | | | RecoveryTime? | | | | ReportTime? | | | | Contact* | | | | Discovery* | | | | Assessment? | | | | Method* | | | | System* | | | | Expectation* | | | | RecordData* | | | | EventData* | | | | AdditionalData* | 3.14 | +-----------------------------+--------------------+---------------+ | Expectation | action? | | | | ext-action? | | | | severity? | | | | restriction? | | | | ext-restriction? | | | | Description* | | | | Description_ML* | | | | DefinedCOA* | | | | StartTime? | | | | EndTime? | | | | Contact? | 3.15 | +-----------------------------+--------------------+---------------+ | System | category? | | | | ext-category? | | | | interface? | | | | spoofed? | | | | virtual? | | | | ownership? | | | | ext-ownership? | | | | restriction? | | | | ext-restriction? | | | | Node | | | | NodeRole* | | | | Service* | | | | OperatingSystem* | | | | Counter* | | Takahashi, et al. Expires January 18, 2019 [Page 11] Internet-Draft JSON-IODEF July 2018 | | AssetID* | | | | Description* | | | | Description_ML* | | | | AdditionalData* | 3.16 | +-----------------------------+--------------------+---------------+ | Node | DomainData* | | | | Address* | | | | PostalAddress? | | | | Location* | | | | Location_ML* | | | | Counter* | 3.17 | +-----------------------------+--------------------+---------------+ | Address | value | | | | category | | | | ext-category? | | | | vlan-name? | | | | vlan-num? | | | | observable-id? | 3.17.1 | +-----------------------------+--------------------+---------------+ | NodeRole | category | | | | ext-category? | | | | Description* | | | | Description_ML* | 3.17.2 | +-----------------------------+--------------------+---------------+ | Counter | value | | | | type | | | | ext-type? | | | | unit | | | | ext-unit? | | | | meaning? | | | | meaning_ML? | | | | duration? | | | | ext-duration? | 3.17.3 | +-----------------------------+--------------------+---------------+ | DomainData | system-status | | | | ext-system-status? | | | | domain-status | | | | ext-domain-status? | | | | observable-id? | | | | Name | | | | DateDomainWasChecked?| | | | RegistrationDate? | | | | ExpirationDate? | | | | RelatedDNS* | | | | Nameservers* | | | | DomainContacts? | 3.18 | +-----------------------------+--------------------+---------------+ | Nameserver | Server | | Takahashi, et al. Expires January 18, 2019 [Page 12] Internet-Draft JSON-IODEF July 2018 | | Address* | 3.18.1 | +-----------------------------+--------------------+---------------+ | DomainContacts | SameDomainContact? | | | | Contact+ | 3.18.2 | +-----------------------------+--------------------+---------------+ | Service | ip-protocol? | | | | observable-id? | | | | ServiceName? | | | | Port? | | | | Portlist? | | | | ProtoCode? | | | | ProtoType? | | | | ProtoField? | | | | ApplicationHeaderField*| | | | EmailData? | | | | Application? | 3.19 | +-----------------------------+--------------------+---------------+ | ServiceName | IANAService? | | | | URL* | | | | Description* | | | | Description_ML* | 3.19.1 | +-----------------------------+--------------------+---------------+ | EmailData | observable-id? | | | | EmailTo* | | | | EmailFrom? | | | | EmailSubject? | | | | EmailX-Mailer? | | | | EmailHeaderField* | | | | EmailHeaders? | | | | EmailBody? | | | | EmailMessage? | | | | HashData* | | | | Signature* | 3.19.2 | +-----------------------------+--------------------+---------------+ | RecordData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | DateTime? | | | | Description* | | | | Description_ML* | | | | Application? | | | | RecordPattern* | | | | RecordItem* | | | | URL* | | | | FileData* | | | | WindowsRegistryKeysModified*| | | | CertificateData* | | | | AdditionalData* | 3.19.3 | Takahashi, et al. Expires January 18, 2019 [Page 13] Internet-Draft JSON-IODEF July 2018 +-----------------------------+--------------------+---------------+ | RecordPattern | type | | | | ext-type? | | | | offset? | | | | offsetunit? | | | | ext-offsetunit? | | | | instance? | | | | value | 3.19.4 | +-----------------------------+--------------------+---------------+ | WindowsRegistryKeysModified | observable-id? | 3.20 | | | Key+ | | +-----------------------------+--------------------+---------------+ | Key | registryaction? | | | | ext-registryaction?| | | | observable-id? | | | | KeyName | | | | KeyValue? | 3.20.1 | +-----------------------------+--------------------+---------------+ | CertificateData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | Certificate+ | 3.21 | +-----------------------------+--------------------+---------------+ | Certificate | observable-id? | | | | X509Data | | | | Description* | | | | Description_ML* | 3.21.1 | +-----------------------------+--------------------+---------------+ | FileData | restriction? | | | | ext-restriction? | | | | observable-id? | | | | File+ | 3.22 | +-----------------------------+--------------------+---------------+ | File | observable-id? | | | | FileName? | | | | FileSize? | | | | FileType? | | | | URL* | | | | HashData? | | | | Signature* | | | | AssociatedSoftware?| | | | FileProperties* | 3.22.1 | +-----------------------------+--------------------+---------------+ | HashData | scope | | | | HashTargetID? | | | | Hash* | | | | FuzzyHash* | 3.23 | +-----------------------------+--------------------+---------------+ Takahashi, et al. Expires January 18, 2019 [Page 14] Internet-Draft JSON-IODEF July 2018 | Hash | DigestMethod | | | | DigestValue | | | | CanonicalizationMethod?| | | | Application? | 3.23.1 | +-----------------------------+--------------------+---------------+ | FuzzyHash | FuzzyHashValue+ | | | | Application? | | | | AdditionalData* | 3.23.2 | +-----------------------------+--------------------+---------------+ | Indicator | restriction? | | | | ext-restriction? | | | | IndicatorID | | | | AlternativeIndicatorID*| | | | Description* | | | | Description_ML* | | | | StartTime? | | | | EndTime? | | | | Confidence? | | | | Contact* | | | | Observable? | | | | uid-ref? | | | | IndicatorExpression?| | | | IndicatorReference?| | | | NodeRole* | | | | AttackPhase* | | | | Reference* | | | | AdditionalData* | 3.24 | +-----------------------------+--------------------+---------------+ | IndicatorID | id | | | | name | | | | version | 3.24.1 | +-----------------------------+--------------------+---------------+ | AlternativeIndicatorID | restriction? | | | | ext-restriction? | | | | IndicatorReference+| 3.24.2 | +-----------------------------+--------------------+---------------+ | Observable | restriction? | | | | ext-restriction? | | | | System? | | | | Address? | | | | DomainData? | | | | Service? | | | | EmailData? | | | | WindowsRegistryKeysModified?| | | | FileData? | | | | CertificateData? | | | | RegistryHandle? | | | | RecordData? | | Takahashi, et al. Expires January 18, 2019 [Page 15] Internet-Draft JSON-IODEF July 2018 | | EventData? | | | | Incident? | | | | Expectation? | | | | Reference? | | | | Assessment? | | | | DetectionPattern? | | | | HistoryItem? | | | | BulkObservable? | | | | AdditionalData* | 3.24.3 | +-----------------------------+--------------------+---------------+ | BulkObservable | type? | | | | ext-type? | | | | BulkObservableFormat?| | | | BulkObservableList | | | | AdditionalData* | 3.24.4 | +-----------------------------+--------------------+---------------+ | BulkObservableFormat | Hash? | | | | AdditionalData* | 3.24.5 | +-----------------------------+--------------------+---------------+ | IndicatorExpression | operator? | | | | ext-operator? | | | | IndicatorExpression*| | | | Observable* | | | | uid-ref* | | | | IndicatorReference*| | | | Confidence? | | | | AdditionalData* | 3.24.6 | +-----------------------------+--------------------+---------------+ | IndicatorReference | uid-ref? | | | | euid-ref? | | | | version? | 3.24.7 | +-----------------------------+--------------------+---------------+ | AttackPhase | AttackPhaseID* | | | | URL* | | | | Description* | | | | Description_ML* | | | | AdditionalData* | 3.24.8 | +-----------------------------+--------------------+---------------+ 3.2. Mapping between JSON and XML IODEF o This document treats attributes and elements of each class defined in [RFC7970] equally and is agnostic on the order of their appearances. o Flow class is deleted, and classes with its instances now directly have instances of EventData class that used to belong to the Flow classs. Takahashi, et al. Expires January 18, 2019 [Page 16] Internet-Draft JSON-IODEF July 2018 o ApplicationHeader class is deleted, and classes with its instances now directly have instances of ApplicationHeaderField class that used to belong to the ApplicationHeader class. o SignatureData class is deleted, and classes with its instances now directly have instance of Signature class that used to belong to the SignatureData class. o IndicatorData class is deleted, and classes with its instances now directly have the instances of Indicator class that used to belong to the IndicatorData class. o ObservableReference class is deleted, and classes with its instances now directly have uid-ref as an element. o Record class is replaced by RecordData class, and RecordData class is renamed to Record class. o Record class is deleted, and classes with its instances now directly have the instances of RecordData class that used to belong to the Record class. o The elements of ML_STRING type are prepared as two separate elements: one of STRING type and another of ML_STRING type, in order to maintain the simplicity of IODEF documents when writing with only STRING type characters. 4. Examples This section provides example of IODEF documents. These examples do not represent the full capabilities of the data model or the the only way to encode particular information. 4.1. Minimal Example A document containing only the mandatory elements and attributes. Takahashi, et al. Expires January 18, 2019 [Page 17] Internet-Draft JSON-IODEF July 2018 { "version": "2.0", "lang": "en", "Incident": [{ "purpose": "reporting", "restriction": "private", "IncidentID": { "id": "492382", "name": "csirt.example.com" }, "GenerationTime": "2015-07-18T09:00:00-05:00", "Contact": [{ "type": "organization", "role": "creator", "Email": [{ "EmailTo": "contact@csirt.example.com" }] }] }] } 4.2. Indicators from a Campaign An example of C2 domains from a given campaign. { "version": "2.0", "lang": "en", "Incidents": [ { "purpose": "watch", "restriction": "green", "IncidentID": { "id": "897923", "name": "csirt.example.com" }, "RelatedActivity": [ { "ThreatActor": [ { "ThreatActorID": "TA-12-AGGRESSIVE-BUTTERFLY", "Description": "Aggressive Butterfly" } ], "Campaign": [ { "CampaignID": "C-2015-59405", "Description": "Orange Giraffe" Takahashi, et al. Expires January 18, 2019 [Page 18] Internet-Draft JSON-IODEF July 2018 } ] } ], "GenerationTime": "2015-10-02T11:18:00-05:00", "Description": [ "Summarizes the Indicators of Compromise for the Orange Giraffe campaign of the Aggressive Butterfly crime gang." ], "Assessment": [ { "BusinessImpact": { "type": "breach-proprietary" } } ], "Contacts": [ { "type": "organization", "role": "creator", "ContactName": "CSIRT for example.com", "Email": { "emailTo": "contact@csirt.example.com" } } ], "IndicatorList": [ { "IndicatorID": { "id": "G90823490", "name": "csirt.example.com", "version": "1" }, "Description": "C2 domains", "StartTime": "2014-12-02T11:18:00-05:00", "Observable": { "BulkObservable": { "type": "fqdn" }, "BulkObservableList": [ "kj290023j09r34.example.com", "09ijk23jfj0k8.example.net", "klknjwfjiowjefr923.example.org", "oimireik79msd.example.org" ] } } ] } Takahashi, et al. Expires January 18, 2019 [Page 19] Internet-Draft JSON-IODEF July 2018 ] } 5. The IODEF Data Model (CDDL) start = iodef ;;; iodef.json: IODEF-Document iodef = { version: text ? lang: lang ? format-id: text ? private-enum-name: text ? private-enum-id: text Incident: [+ Incident] ? AdditionalData: [+ ExtensionType] } duration = "second" / "minute" / "hour" / "day" / "month" / "quarter" / "year" / "ext-value" lang = "en" / "jp" restriction = "public" / "partner" / "need-to-know" / "private" / "default" / "white" / "green" / "amber" / "red" / "ext-value" DATETIME = text URLtype = text IDtype = text action = "nothing" / "contact-source-site" / "cotact-target-site" / "contact-sender" / "investigate" / "block-host" / "block-network" / "block-port" / "rate-limit-host" / "rate-limit-network" / "rate-limit-port" / "redirect-traffic" / "honeypot" / "upgrade-software" / "rebuild-asset" / "harden-asset" / "remediate-other" / "status-triage" / "status-new-info" / "watch-and-report" / "training" / "defined-coa" / "other" / "ext-value" ExtensionType = { ? Name: text ? dtype: "boolean" / "byte" / "bytes" / "character" / "date-time" / "ntpstamp" / "integer" / "portlist" / "real" / "string" / "file" / "path" / "frame" / "packet" / "ipv4-packet" / "ipv6-packet" / "url" / "csv" / "winreg" / "xml" / "ext-value" ? ext-dtype: text ? meaning: text ? formatid: text ? restriction: restriction Takahashi, et al. Expires January 18, 2019 [Page 20] Internet-Draft JSON-IODEF July 2018 ? ext-restriction: text ? observable-id: IDtype } SoftwareType = { ? SoftwareReference: SoftwareReference ? URL: URLtype ? Description: text } SoftwareReference = { ? value: text spec-name: "custom" / "cpe" / "swid" / "ext-value" ? ext-spec-name: text ? dtype: "bytes" / "integer" / "real" / "string" / "xml" / "ext-value" ? ext-dtype: text } Incident = { purpose: "traceback" / "mitigation" / "reporting" / "watch" / "other" / "ext-value" ? ext-purpose: text ? status: "new" / "in-progress"/ "forwarded" / "resolved" / "future" / "ext-value" ? ext-status: text ? lang: lang ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype IncidentID: IncidentID ? AlternativeID: AlternativeID ? RelatedActivity: [+ RelatedActivity] ? DetectTime: text ? StartTime: text ? EndTime: text ? RecoveryTime: text ? ReportTime: text GenerationTime: text ? Description: [+ text] ? Description_ML: [+ text] ? Discovery: [+ Discovery] ? Assessment: [+ Assessment] ? Method: [+ Method] Contact: [+ Contact] ? EventData: [+ EventData] ? Indicator: [+ Indicator] ? History: History ? AdditionalData: [+ ExtensionType] Takahashi, et al. Expires January 18, 2019 [Page 21] Internet-Draft JSON-IODEF July 2018 } IncidentID = { id: text name: text ? instance: text ? restriction: restriction ? ext-restriction: text } AlternativeID = { ? restriction: restriction ? ext-restriction: text IncidentID: [+ IncidentID] } RelatedActivity = { ? restriction: restriction ? ext-restriction: text ? IncidentID: [+ IncidentID] ? URL: [+ URLtype] ? ThreatActor: [+ ThreatActor] ? Campaign: [+ Campaign] ? IndicatorID: [+ IndicatorID] ? Confidence: Confidence ? Description: [+ text] ? AdditionalData: [+ ExtensionType] } ThreatActor = { ? restriction: restriction ? ext-restriction: text ? ThreatActorID: [+ text] ? URL: [+ URLtype] ? Description: [+ text] ? Description_ML: [+ text] ? AdditionalData: [+ ExtensionType] } Campaign = { ? restriction: restriction ? ext-restriction: text ? CampaignID: [+ text] ? URL: [+ URLtype] ? Description: [+ text] ? Description_ML: [+ text] ? AdditionalData: [+ ExtensionType] } Takahashi, et al. Expires January 18, 2019 [Page 22] Internet-Draft JSON-IODEF July 2018 Contact = { role: "creator" / "reporter" / "admin" / "tech" / "provider" / "user" / "billing" / "legal" / "irt" / "abuse" / "cc" / "cc-irt" / "leo" / "vendor" / "vendor-support" / "victim" / "victim-notified" / "ext-value" ? ext-role: text type: "person" / "organization" / "ext-value" ? ext-type: text ? restriction: restriction ? ext-restriction: text ? ContactName: [+ text] ? ContactName_ML: [+ text] ? ContactTitle: [+ text] ? ContactTitle_ML: [+ text] ? Description: [+ text] ? Description_ML: [+ text] ? RegistryHandle: [+ RegistryHandle] ? PostalAddress: [+ PostalAddress] ? Email: [+ Email] ? Telephone: [+ Telephone] ? Timezone: text ? Contact: [+ Contact] ? AdditionalData: [+ ExtensionType] } RegistryHandle = { handle: text registry: "internic" / "apnic" / "arin" / "lacnic" / "ripe" / "afrinic" / "local" / "ext-value" ? ext-registry: text } PostalAddress = { ? type: text ? ext-type: text PAddress: text ? Description: [+ text] ? Description_ML: [+ text] } Email = { ? type: "direct" / "hotline" / "ext-value" ? ext-type: text EmailTo: text ? Description: [+ text] ? Description_ML: [+ text] } Takahashi, et al. Expires January 18, 2019 [Page 23] Internet-Draft JSON-IODEF July 2018 Telephone = { ? type: "wired" / "mobile" / "fax" / "hotline" / "ext-value" ? ext-type: text TelephoneNumber: text ? Description: [+ text] ? Description_ML: [+ text] } Discovery = { ? source: "nidps" / "hips" / "siem" / "av" / "third-party-monitoring" / "incident" / "os-log" / "application-log" / "device-log" / "network-flow" / "passive-dns" / "investiation" / "audit" / "international-notification" / "external-notification" / "leo" / "partner" / "actor" / "unknown" / "ext-value" ? ext-source: text ? restriction: restriction ? ext-restriction: text ? Description: [+ text] ? Description_ML: [+ text] ? Contact: [+ Contact] ? DetectionPattern: [+ DetectionPattern] } DetectionPattern = { ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype Application: SoftwareType ? Description: [+ text] ? Description_ML: [+ text] ? DetectionConfiguration: [+ text] } Method = { ? restriction: restriction ? ext-restriction: text ? Reference: [+ Reference] ? Description: [+ text] ? Description_ML: [+ text] ? AttackPattern: [+ StructuredInformation] ? Vulnerability: [+ StructuredInformation] ? Weakness: [+ StructuredInformation] ? AdditionalData: [+ ExtensionType] } StructuredInformation = { specID: text ? ext-specID: text Takahashi, et al. Expires January 18, 2019 [Page 24] Internet-Draft JSON-IODEF July 2018 ? contentID: text ? RawData: any ? URL: URLtype } Reference = { ? observable-id: IDtype ? ReferenceName: ReferenceName ? URL: [+ URLtype] ? Description: [+ text] ? Description_ML: [+ text] } ReferenceName = { specIndex: int ID: text } Assessment = { ? occurrence: "actual" / "potential" ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype ? IncidentCategory: [+ text] ? SystemImpact: [+ SystemImpact] ? BusinessImpact: [+ BusinessImpact] ? TimeImpact: [+ TimeImpact] ? MonetaryImpact: [+ MonetaryImpact] ? IntendedImpact: [+ BusinessImpact] ? Counter: [+ Counter] ? MitigatingFactor: [+ text] ? MitigatingFactor_ML: [+ text] ? Cause: [+ text] ? Cause_ML: [+ text] ? Confidence: Confidence ? AdditionalData: [+ ExtensionType] } SystemImpact = { ? severity: "low" / "medium" / "high" ? completion: "failed" / "succeeded" type: "takeover-account" / "takeover-service" / "takeover-system" / "cps-manipulation" / "cps-damage" / "availability-data" / "availability-account" / "availability-service" / "availability-system" / "damaged-system" / "damaged-data" / "breach-proprietary" / "breach-privacy" / "breach-credential" / "breack-configuration" / "integrity-data" / "integrity-configuration" / "integrity-hardware" / Takahashi, et al. Expires January 18, 2019 [Page 25] Internet-Draft JSON-IODEF July 2018 "traffic-redirection" / "monitoring-traffic" / "monitoring-host" / "policy" / "unknown" / "ext-value" ? ext-type: text ? Description: [+ text] ? Description_ML: [+ text] } BusinessImpact = { ? severity: "none" / "low" / "medium" / "high" / "unknown" / "ext-value" ? ext-severity: text type: "breach-proprietary" / "breach-privacy" / "breach-credential" / "loss-of-integrity" / "loss-of-service" / "theft-financial" / "theft-service" / "degraded-reputation" / "asset-damage" / "asset-manipulation" / "legal" / "extortion" / "unknown" / "ext-value" ? ext-type: text ? Description: [+ text] ? Description_ML: [+ text] } TimeImpact = { value: int ? severity: "low" / "medium" / "high" metric: "labor" / "elapsed" / "downtime" / "ext-value" ? ext-metric: text ? duration: duration ? ext-duration: text } MonetaryImpact = { value: int ? severity: "low" / "medium" / "high" ? currency: text } Confidence = { value: int rating: "low" / "medium" / "high" / "numeric" / "unknown" / "ext-value" ? ext-rating: text } History = { ? restriction: restriction ? ext-restriction: text HistoryItem: [+ HistoryItem] } HistoryItem = { Takahashi, et al. Expires January 18, 2019 [Page 26] Internet-Draft JSON-IODEF July 2018 action: action ? ext-action: text ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype DateTime: DATETIME ? IncidentID: IncidentID ? Contact: Contact ? Description: [+ text] ? Description_ML: [+ text] ? DefinedCOA: [+ text] ? AdditionalData: [+ ExtensionType] } EventData = { ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype ? Description: [+ text] ? Description_ML: [+ text] ? DetectTime: DATETIME ? StartTime: DATETIME ? EndTime: DATETIME ? RecoveryTime: DATETIME ? ReportTime: DATETIME ? Contact: [+ Contact] ? Discovery: [+ Discovery] ? Assessment: Assessment ? Method: [+ Method] ? System: [+ System] ? Expectation: [+ Expectation] ? RecordData: [+ RecordData] ? EventData: [+ EventData] ? AdditionalData: [+ ExtensionType] } Expectation = { ? action: action ? ext-action: text ? severity: "low" / "medium" / "high" ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype ? Description: [+ text] ? Description_ML: [+ text] ? DefinedCOA: [+ text] ? StartTime: DATETIME ? EndTime: DATETIME Takahashi, et al. Expires January 18, 2019 [Page 27] Internet-Draft JSON-IODEF July 2018 ? Contact: Contact } System = { ? category: "source" / "target" / "intermediate" / "sensor" / "infrastructure" / "ext-value" ? ext-category: text ? interface: text ? spoofed: "unknown" / "yes" / "no" ? virtual: "yes" / "no" / "unknown" ? ownership: "organization" / "personal" / "partner" / "customer" / "no-relationship" / "unknown" / "ext-value" ? ext-ownership: text ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype Node: Node ? NodeRole: [+ NodeRole] ? Service: [+ Service] ? OperatingSystem: [+ SoftwareType] ? Counter: [+ Counter] ? AssetID: [+ text] ? Description: [+ text] ? Description_ML: [+ text] ? AdditionalData: [+ ExtensionType] } Node = { ? DomainData: [+ DomainData] ? Address: [+ Address] ? PostalAddress: PostalAddress ? Location: [+ text] ? Location_ML: [+ text] ? Counter: [+ Counter] } Address = { value: text category: "asn" / "atm" / "e-mail" / "ipv4-addr" / "ipv4-net" / "ipv4-net-masked" / "ipv4-net-mask" / "ipv6-addr" / "ipv6-net" / "ipv6-net-masked" / "mac" / "site-url" / "ext-value" ? ext-category: text ? vlan-name: text ? vlan-num: int ? observable-id: IDtype } Takahashi, et al. Expires January 18, 2019 [Page 28] Internet-Draft JSON-IODEF July 2018 NodeRole = { category: "client" / "client-enterprise" / "clent-partner" / "client-remote" / "client-kiosk" / "client-mobile" / "server-internal" / "server-public" / "www" / "mail" / "webmail" / "messaging" / "streaming" / "voice" / "file" / "ftp" / "p2p" / "name" / "directory" / "credential" / "print" / "application" / "database" / "backup" / "dhcp" / "assessment" / "source-control" / "config-management" / "monitoring" / "infra" / "infra-firewall" / "infra-router" / "infra-switch" / "camera" / "proxy" / "remote-access" / "log" / "virtualization" / "pos" / "scada" / "scada-supervisory" / "sinkhole" / "honeypot" / "anomyzation" / "c2-server" / "malware-distribution" / "drop-server" / "hot-point" / "reflector" / "phishing-site" / "spear-phishing-site" / "recruiting-site" / "fraudulent-site" / "ext-value" ? ext-category: text ? Description: [+ text] ? Description_ML: [+ text] } Counter = { value: text type: "count" / "peak" / "average" / "ext-value" ? ext-type: text unit: "byte" / "mbit" / "packet" / "flow" / "session" / "alert" / "message" / "event" / "host" / "site" / "organization" / "ext-value" ? ext-unit: text ? meaning: text ? meaning_ML: text ? duration: duration ? ext-duration: text } DomainData = { system-status: "spoofed" / "fraudulent" / "innocent-hacked" / "innocent-hijacked" / "unknown" / "ext-value" ? ext-system-status: text domain-status: "reservedDelegation" / "assignedAndActive" / "assignedAndInactive" / "assignedAndOnHold" / "revoked" / "transferPending" / "registryLock" / "registrarLock" / "other" / "unknown" / "ext-value" ? ext-domain-status: text ? observable-id: IDtype Name: text ? DateDomainWasChecked: DATETIME ? RegistrationDate: DATETIME Takahashi, et al. Expires January 18, 2019 [Page 29] Internet-Draft JSON-IODEF July 2018 ? ExpirationDate: DATETIME ? RelatedDNS: [+ ExtensionType] ? NameServers: [+ NameServers] ? DomainContacts: DomainContacts } NameServers = { Server: text ? Address: [+ Address] } DomainContacts = { ? SameDomainContact: text Contact: [+ Contact] } Service = { ? ip-protocol: int ? observable-id: IDtype ? ServiceName: ServiceName ? Port: int ? Portlist: text ? ProtoCode: int ? ProtoType: int ? ProtoField: int ? ApplicationHeaderField: [+ ExtensionType] ? EmailData: EmailData ? Application: SoftwareType } ServiceName = { ? IANAService: text ? URL: [+ URLtype] ? Description: [+ text] ? Description_ML: [+ text] } EmailData = { ? observable-id: IDtype ? EmailTo: [+ text] ? EmailFrom: text ? EmailSubject: text ? EmailX-Mailer: text ? EmailHeaderField: [+ ExtensionType] ? EmailHeaders: text ? EmailBody: text ? EmailMessage: text ? HashData: [+ HashData] Takahashi, et al. Expires January 18, 2019 [Page 30] Internet-Draft JSON-IODEF July 2018 ? Signature: [+ text] } RecordData = { ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype ? DateTime: DATETIME ? Description: [+ text] ? Description_ML: [+ text] ? Applicadtion: SoftwareType ? RecordPattern: [+ RecordPattern] ? RecordItem: [+ ExtensionType] ? URL: [+ URLtype] ? FileData: [+ FileData] ? WindowsRegistryKeysModified: [+ WindowsRegistryKeysModified] ? CertificateData: [+ CertificateData] ? AdditionalData: [+ ExtensionType] } RecordPattern = { value: text type: "regex" / "binary" / "xpath" / "ext-value" ? ext-type: text ? offset: int ? offsetunit: "line" / "byte" / "ext-value" ? ext-offsetunit: text ? instance: int } WindowsRegistryKeysModified = { ? observable-id: IDtype Key: [+ Key] } Key = { ? registryaction: "add-key" / "add-value" / "delete-key" / "delete-value" / "modify-key" / "modify-value" / "ext-value" ? ext-registryaction: text ? observable-id: IDtype KeyName: text ? KeyValue: text } CertificateData = { ? restriction: restriction ? ext-restriction: text Takahashi, et al. Expires January 18, 2019 [Page 31] Internet-Draft JSON-IODEF July 2018 ? observable-id: IDtype Certificate: [+ Certificate] } Certificate = { ? observable-id: IDtype X509Data: text ? Description: [+ text] ? Description_ML: [+ text] } FileData = { ? restriction: restriction ? ext-restriction: text ? observable-id: IDtype File: [+ File] } File = { ? observable-id: IDtype ? FileName: text ? FileSize: int ? FileType: text ? URL: [+ URLtype] ? HashData: HashData ? Signature: [+ text] ? AssociatedSoftware: SoftwareType ? FileProperties: [+ ExtensionType] } HashData = { scope: "file-contents" / "file-pe-section" / "file-pe-iat" / "file-pe-resource" / "file-pdf-object" / "email-hash" / "email-hash-header" / "email-hash-body" ? HashTargetID: text ? Hash: [+ Hash] ? FuzzyHash: [+ FuzzyHash] } Hash = { DigestMethod: text DigestValue: text ? CanonicalizationMethod: any ? Application: SoftwareType } FuzzyHash = { FuzzyHashValue: [+ ExtensionType] Takahashi, et al. Expires January 18, 2019 [Page 32] Internet-Draft JSON-IODEF July 2018 ? Application: SoftwareType ? AdditionalData: [+ ExtensionType] } Indicator = { ? restriction: restriction ? ext-restriction: text IndicatorID: IndicatorID ? AlternativeIndicatorID: [+ AlternativeIndicatorID] ? Description: [+ text] ? Description_ML: [+ text] ? StartTime: DATETIME ? EndTime: DATETIME ? Confidence: Confidence ? Contact: [+ Contact] ? Observable: Observable ? uid-ref: text ? IndicatorExpression: IndicatorExpression ? IndicatorReference: IndicatorReference ? NodeRole: [+ NodeRole] ? AttackPhase: [+ AttackPhase] ? Reference: [+ Reference] ? AdditionalData: [+ ExtensionType] } IndicatorID = { id: IDtype name: text version: text } AlternativeIndicatorID = { ? restriction: restriction ? ext-restriction: text IndicatorReference: [+ IndicatorReference] } Observable = { ? restriction: restriction ? ext-restriction: text ? System: System ? Address: Address ? DomainData: DomainData ? EmailData: EmailData ? Service: Service ? WindowsRegistryKeysModified: WindowsRegistryKeysModified ? FileData: FileData ? CertificateData: CertificateData Takahashi, et al. Expires January 18, 2019 [Page 33] Internet-Draft JSON-IODEF July 2018 ? RegistryHandle: RegistryHandle ? RecordData: RecordData ? EventData: EventData ? Incident: Incident ? Expectation: Expectation ? Reference: Reference ? Assessment: Assessment ? DetectionPattern: DetectionPattern ? HistoryItem: HistoryItem ? BulkObservable: BulkObservable ? AdditionalData: [+ ExtensionType] } BulkObservable = { ? type: "asn" / "atm" / "e-mail" / "ipv4-addr" / "ipv4-net" / "ipv4-net-mask" / "ipv6-addr" / "ipv6-net" / "ipv6-net-mask" / "mac" / "site-url" / "domain-name" / "domain-to-ipv4" / "domain-to-ipv6" / "domain-to-ipv4-timestamp" / "domain-to-ipv6-timestamp" / "ipv4-port" / "ipv6-port" / "windows-reg-key" / "file-hash" / "email-x-mailer" / "email-subject" / "http-user-agent" / "http-request-uri" / "mutex" / "file-path" / "user-name" / "ext-value" ? ext-type: text ? BulkObservableFormat: BulkObservableFormat BulkObservableList: [+ text] ? AdditionalData: [+ ExtensionType] } BulkObservableFormat = { ? Hash: Hash ? AdditionalData: [+ ExtensionType] } IndicatorExpression = { ? operator: "not" / "and" / "or" / "xor" ? ext-operator: text ? IndicatorExpression: [+ IndicatorExpression] ? Observable: [+ Observable] ? uid-ref: [+ text] ? IndicatorReference: [+ IndicatorReference] ? Confidence: Confidence ? AdditionalData: [+ ExtensionType] } IndicatorReference = { ? uid-ref: text ? euid-ref: text ? version: text Takahashi, et al. Expires January 18, 2019 [Page 34] Internet-Draft JSON-IODEF July 2018 } AttackPhase = { ? AttackPhaseID: [+ text] ? URL: [+ URLtype] ? Description: [+ text] ? Description_ML: [+ text] ? AdditionalData: [+ ExtensionType] } Figure 2: Data Model in CDDL 6. Acknowledgements We would like to thank Henk Birkholz and Carsten Bormann for their insightful comments on CDDL. 7. IANA Considerations This document registers a JSON schema. 8. Security Considerations This memo does not provide any further security considerations than the one described in [RFC7970]. 9. Normative References [jsonschema] "JSON Schema", 2006. http://json-schema.org/ [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, <https://www.rfc-editor.org/info/rfc2119>. [RFC7970] Danyliw, R., "The Incident Object Description Exchange Format Version 2", RFC 7970, DOI 10.17487/RFC7970, November 2016, <https://www.rfc-editor.org/info/rfc7970>. Appendix A. The IODEF Data Model (JSON Schema) This section provides a JSON schema that defines the IODEF Data Model defined in this draft. { "$schema": "http://json-schema.org/draft-04/schema#", Takahashi, et al. Expires January 18, 2019 [Page 35] Internet-Draft JSON-IODEF July 2018 "definitions": { "action": {"enum": ["nothing","contact-source-site", "contact-target-site","contact-sender","investigate", "block-host","block-network","block-port","rate-limit-host", "rate-limit-network","rate-limit-port","redirect-traffic", "honeypot","upgrade-software","rebuild-asset","harden-asset", "remediate-other","status-triage","status-new-info", "watch-and-report","training","defined-coa","ext-value"]}, "duration": {"enum": ["second","minute","hour","day","month","quarter", "year","ext-value"]}, "lang": {"enum": ["en","jp"]}, "purpose": {"enum": ["traceback","mitigation","reporting","watch", "other","ext-value"]}, "restriction": {"enum": ["public","partner","need-to-know","private", "default","white","green","amber","red","ext-value"]}, "status": {"enum": ["new","in-progress","forwarded","resolved", "future","ext-value"]}, "DATETIME": {"type": "string"}, "PORTLIST": {"type": "string"}, "URLtype": {"type": "string"}, "IDtype": {"type": "string"}, "ExtensionType": { "type": "object", "properties": { "name": {"type": "string"}, "dtype": {"enum": ["boolean","byte","bytes","character","date-time", "ntpstamp","integer","portlist","real","string","file", "path","frame","packet","ipv4-packet","ipv6-packet","url", "csv","winreg","xml","ext-value"]}, "ext-dtype": {"type": "string"}, "meaning": {"type": "string"}, "formatid": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}}}, "ExtensionTypeList": { "type": "array", "items": {"$ref": "#/definitions/ExtensionType"}}, "SoftwareType": { "type": "object", "properties": { "SoftwareReference": {"$ref": "#/definitions/SoftwareReference"}, "URL": {"$ref": "#/definitions/URLtype"}, "Description": {"type": "array", "items": {"type":"string"}}}, "required": [], "additionalProperties": false}, "SoftwareReference": { "type": "object", Takahashi, et al. Expires January 18, 2019 [Page 36] Internet-Draft JSON-IODEF July 2018 "properties": { "value": {"type": "string"}, "spec-name": {"type": "string"}, "ext-spec-name": {"type": "string"}, "dtype": {"type": "string"}, "ext-dtype": {"type": "string"}}, "required": ["spec-name"], "additionalProperties": false}, "StructuredInfo": { "type": "object", "properties": { "specID": {"type": "string"}, "ext-specID": {"type": "string"}, "contentID": {"type": "string"}, "RawData": {"type": "string"}, "URL": {"$ref": "#/definitions/URLtype"}}, "required": ["specID"], "additionalProperties": false}, "Incident": { "title": "Incident", "description": "JSON schema for Incident class", "type": "object", "properties": { "purpose": {"$ref": "#/definitions/purpose"}, "ext-purpose": {"type": "string"}, "status": {"$ref": "#/definitions/status"}, "ext-status": {"type": "string"}, "lang": {"$ref": "#/definitions/lang"}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "IncidentID": {"$ref": "#/definitions/IncidentID"}, "AlternativeID": {"$ref": "#/definitions/AlternativeID"}, "RelatedActivity": { "type": "array", "items": {"$ref": "#/definitions/RelatedActivity"}}, "DetectTime": {"type": "string"}, "StartTime": {"type": "string"}, "EndTime": {"type": "string"}, "RecoveryTime": {"type": "string"}, "ReportTime": {"type": "string"}, "GenerationTime": {"type": "string"}, "Description": {"type": "array","items": {"type": "string"}}, "Discovery": { "type": "array","items": {"$ref": "#/definitions/Discovery"}}, "Assessment": { "type": "array","items": {"$ref": "#/definitions/Assessment"}}, "Methods": { Takahashi, et al. Expires January 18, 2019 [Page 37] Internet-Draft JSON-IODEF July 2018 "type": "array","items": {"$ref": "#/definitions/Method"}}, "Contacts": { "type": "array","items": {"$ref": "#/definitions/Contact"}}, "EventData": { "type": "array","items": {"$ref": "#/definitions/EventData"}}, "IndicatorList": { "type": "array","items": {"$ref": "#/definitions/Indicator"}}, "History": {"$ref": "#/definitions/History"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["IncidentID","GenerationTime","Contacts","purpose"], "additionalProperties": false}, "IncidentID": { "title": "IncidentID", "description": "JSON schema for IncidentID class", "type": "object", "properties": { "id": {"type": "string"}, "name": {"type": "string"}, "instance": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}}, "required": ["name"], "additionalProperties": false}, "AlternativeID": { "title": "AlternativeID", "description": "JSON schema for AlternativeID class", "type": "object", "properties": { "IncidentID": { "type": "array","items":{"$ref": "#/definitions/IncidentID"}}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}}, "required": ["IncidentID"], "additionalProperties": false}, "RelatedActivity": { "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "IncidentID": { "type": "array","items": {"$ref": "#/definitions/IncidentID"}}, "URL": { "type": "array","items": {"$ref": "#/definitions/URLtype"}}, "ThreatActor": { "type": "array","items": {"$ref": "#/definitions/ThreatActor"}}, "Campaign": { "type": "array","items": {"$ref": "#/definitions/Campaign"}}, "IndicatorID": { "type": "array","items": {"$ref": "#/definitions/IndicatorID"}}, Takahashi, et al. 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Expires January 18, 2019 [Page 42] Internet-Draft JSON-IODEF July 2018 "required": ["type"], "additionalProperties": false}, "BusinessImpact": { "type": "object", "properties": { "severity": { "enum":["none","low","medium","high","unknown","ext-value"]}, "ext-severity": {"type":"string"}, "type": { "enum":["breach-proprietary","breach-privacy","breach-credential", "loss-of-integrity","loss-of-service","theft-financial", "theft-service","degraded-reputation","asset-damage", "asset-manipulation","legal","extortion","unknown", "ext-value"]}, "ext-type": {"type": "string"}, "Description": {"type": "array","items": {"type": "string"}}}, "required": ["type"], "additionalProperties": false}, "TimeImpact": { "type": "object", "properties": { "value": {"type": "number"}, "severity": {"enum": ["low","medium","high"]}, "metric": {"enum": ["labor","elapsed","downtime","ext-value"]}, "ext-metric": {"type": "string"}, "duration": {"$ref":"#/definitions/duration"}, "ext-duration": {"type": "string"}}, "required": ["metric"], "additionalProperties": false}, "MonetaryImpact": { "type": "object", "properties": { "value": {"type": "number"}, "severity": {"enum":["low","medium","high"]}, "currency": {"type": "string"}}, "required": [], "additionalProperties": false}, "Confidence": { "type": "object", "properties": { "value": {"type": "number"}, "rating": { "enum": ["low","medium","high","numeric","unknown","ext-value"]}, "ext-rating": {"type":"string"}}, "required": ["rating"], "additionalProperties": false}, "History": { "type": "object", Takahashi, et al. Expires January 18, 2019 [Page 43] Internet-Draft JSON-IODEF July 2018 "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "HistoryItem": { "type": "array","items": {"$ref": "#/definitions/HistoryItem"}}}, "required": ["HistoryItem"], "additionalProperties": false}, "HistoryItem": { "type": "object", "properties": { "action": {"$ref": "#/definitions/action"}, "ext-action": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "DateTime": {"$ref": "#/definitions/DATETIME"}, "IncidentID": {"$ref": "#/definitions/IncidentID"}, "Contact": {"$ref": "#/definitions/Contact"}, "Description": {"type": "array","items": {"type": "string"}}, "DefinedCOA": {"type": "array","items": {"type": "string"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["DateTime","action"], "additionalProperties": false}, "EventData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Description": {"type": "array","items": {"type": "string"}}, "DetectTime": {"type": "string"}, "StartTime": {"type": "string"}, "EndTime": {"type": "string"}, "RecoveryTime": {"type": "string"}, "ReportTime": {"type": "string"}, "Contact": { "type": "array","items": {"$ref": "#/definitions/Contact"}}, "Discovery": { "type": "array","items": {"$ref": "#/definitions/Discovery"}}, "Assessment": {"$ref": "#/definitions/Assessment"}, "Method": { "type": "array","items": {"$ref": "#/definitions/Method"}}, "System": { "type": "array","items": {"$ref": "#/definitions/System"}}, "Expectation": { "type": "array","items": {"$ref": "#/definitions/Expectation"}}, "RecordData": {"type": "array", "items": {"$ref": "#/definitions/RecordData"}}, Takahashi, et al. Expires January 18, 2019 [Page 44] Internet-Draft JSON-IODEF July 2018 "EventData": { "type": "array","items": {"$ref": "#/definitions/EventData"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["ReportTime"], "additionalProperties": false}, "Expectation": { "type": "object", "properties": { "action": {"$ref":"#/definitions/action"}, "ext-action": {"type": "string"}, "severity": {"enum": ["low","medium","high"]}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Description": {"type": "array","items": {"type": "string"}}, "DefinedCOA": {"type": "array","items": {"type": "string"}}, "StartTime": {"type": "string"}, "EndTime": {"type": "string"}, "Contact": {"$ref": "#/definitions/Contact"}}, "required": [], "additionalProperties": false}, "System": { "type": "object", "properties": { "category": { "enum": ["source","target","intermediate","sensor", "infrastructure","ext-value"]}, "ext-category": {"type": "string"}, "interface": {"type": "string"}, "spoofed": {"enum": ["unknown","yes","no"]}, "virtual": {"enum": ["yes","no","unknown"]}, "ownership": { "enum":["organization","personal","partner","customer", "no-relationship","unknown","ext-value"]}, "ext-ownership": {"type": "string"}, "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Node": {"$ref": "#/definitions/Node"}, "NodeRole": { "type": "array","items": {"$ref": "#/definitions/NodeRole"}}, "Service": { "type": "array","items": {"$ref": "#/definitions/Service"}}, "OperatingSystem": { "type": "array","items": {"$ref": "#/definitions/SoftwareType"}}, "Counter": { "type": "array","items": {"$ref": "#/definitions/Counter"}}, "AssetID": {"type": "array","items": {"type": "string"}}, Takahashi, et al. 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Expires January 18, 2019 [Page 46] Internet-Draft JSON-IODEF July 2018 "fraudulent-site","ext-value"]}, "ext-category": {"type": "string"}, "Description": {"type": "array","items": {"type": "string"}}}, "required": ["category"], "additionalProperties": false}, "Counter": { "type": "object", "properties": { "value": {"type": "string"}, "type": {"enum": ["count","peak","average","ext-value"]}, "ext-type": {"type": "string"}, "unit": {"enum": ["byte","mbit","packet","flow","session","alert", "message","event","host","site","organization", "ext-value"]}, "ext-unit": {"type": "string"}, "meaning": {"type": "string"}, "duration": {"$ref":"#/definitions/duration"}, "ext-duration": {"type": "string"}}, "required": ["type","unit"], "additionalProperties": false}, "DomainData": { "type": "object", "properties": { "system-status": { "enum": ["spoofed","fraudulent","innocent-hacked", "innocent-hijacked","unknown","ext-value"]}, "ext-system-status": {"type": "string"}, "domain-status": { "enum": [ "reservedDelegation","assignedAndActive","assignedAndInactive", "assignedAndOnHold","revoked","transferPending","registryLock", "registrarLock","other","unknown","ext-value"]}, "ext-domain-status": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Name": {"type": "string"}, "DateDomainWasChecked": {"$ref": "#/definitions/DATETIME"}, "RegistrationDate": {"$ref": "#/definitions/DATETIME"}, "ExpirationDate": {"$ref": "#/definitions/DATETIME"}, "RelatedDNS": { "type": "array","items": {"$ref": "#/definitions/ExtensionType"}}, "NameServers": { "type": "array","items": {"$ref": "#/definitions/NameServers"}}, "DomainContacts": { "$ref": "#/definitions/DomainContacts"}}, "required": ["Name","system-status","domain-status"], "additionalProperties": false}, "NameServers": { "type": "object", Takahashi, et al. Expires January 18, 2019 [Page 47] Internet-Draft JSON-IODEF July 2018 "properties": { "Server": {"type": "string"}, "Address": {"type":"array", "items":{"$ref":"#/definitions/Address"}}}, "required": ["Server","Address"], "additionalProperties": false}, "DomainContacts": { "type": "object", "properties": { "SameDomainContact": {"type": "string"}, "Contact": {"type":"array", "items":{"$ref":"#/definitions/Contact"}}}, "required": ["Contact"], "additionalProperties": false}, "Service": { "type": "object", "properties": { "ip-protocol": {"type": "integer"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "ServiceName": {"$ref": "#/definitions/ServiceName"}, "Port": {"type": "integer"}, "Portlist": {"$ref": "#/definitions/PORTLIST"}, "ProtoCode": {"type": "integer"}, "ProtoType": {"type": "integer"}, "ProtoField": {"type": "integer"}, "ApplicationHeaderField":{"$ref":"#/definitions/ExtensionTypeList"}, "EmailData": {"$ref": "#/definitions/EmailData"}, "Application": {"$ref": "#/definitions/SoftwareType"}}, "required": [], "additionalProperties": false}, "ServiceName": { "type": "object", "properties": { "IANAService": {"type": "string"}, "URL": {"type": "array","items": {"$ref": "#/definitions/URLtype"}}, "Description": {"type": "array","items": {"type": "string"}}}, "required": [], "additionalProperties": false}, "EmailData": { "type": "object", "properties": { "observable-id": {"$ref": "#/definitions/IDtype"}, "EmailTo": {"type": "array","items": {"type": "string"}}, "EmailFrom": {"type": "string"}, "EmailSubject": {"type": "string"}, "EmailX-Mailer": {"type": "string"}, "EmailHeaderField": { "type": "array","items": {"$ref": "#/definitions/ExtensionType"}}, Takahashi, et al. Expires January 18, 2019 [Page 48] Internet-Draft JSON-IODEF July 2018 "EmailHeaders": {"type": "string"}, "EmailBody": {"type": "string"}, "EmailMessage": {"type": "string"}, "HashData": { "type": "array","items": {"$ref": "#/definitions/HashData"}}, "Signature": {"type": "array","items": {"type": "string"}}}, "required": [], "additionalProperties": false}, "RecordData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "DateTime": {"$ref": "#/definitions/DATETIME"}, "Description": {"type": "array","items": {"type": "string"}}, "Applicadtion": {"$ref": "#/definitions/SoftwareType"}, "RecordPattern": { "type": "array","items": {"$ref": "#/definitions/RecordPattern"}}, "RecordItem": { "type": "array","items": {"$ref": "#/definitions/ExtensionType"}}, "URL": { "type": "array","items": {"$ref": "#/definitions/URLtype"}}, "FileData": { "type": "array","items": {"$ref": "#/definitions/FileData"}}, "WindowsRegistryKeysModified": { "type": "array", "items": {"$ref": "#/definitions/WindowsRegistryKeysModified"}}, "CertificateData": { "type":"array","items":{"$ref":"#/definitions/CertificateData"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false }, "RecordPattern": { "type": "object", "properties": { "value": {"type": "string"}, "type": {"enum": ["regex","binary","xpath","ext-value"]}, "ext-type": {"type": "string"}, "offset": {"type": "integer"}, "offsetunit": {"enum":["line","byte","ext-value"]}, "ext-offsetunit": {"type": "string"}, "instance": {"type": "integer"}}, "required": ["type"], "additionalProperties": false}, "WindowsRegistryKeysModified": { "type": "object", Takahashi, et al. Expires January 18, 2019 [Page 49] Internet-Draft JSON-IODEF July 2018 "properties": { "observabile-id": {"$ref": "#/definitions/IDtype"}, "Key": {"type": "array","items": {"$ref": "#/definitions/Key"}}}, "required": ["Key"], "additionalProperties": false}, "Key": { "type": "object", "properties": { "registryaction": {"enum": ["add-key","add-value","delete-key", "delete-value","modify-key","modify-value", "ext-value"]}, "ext-registryaction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "KeyName": {"type":"string"}, "KeyValue": {"type": "string"}}, "required": ["KeyName"], "additionalProperties": false}, "CertificateData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "Certificate": { "type": "array","items": {"$ref": "#/definitions/Certificate"}}}, "required": ["Certificate"], "additionalProperties": false}, "Certificate": { "type": "object", "properties": { "observable-id": {"$ref": "#/definitions/IDtype"}, "X509Data": {type: "string"}, "Description": {"type": "array","items": {"type": "string"}}}, "required": ["X509Data"], "additionalProperties": false}, "FileData": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "observable-id": {"$ref": "#/definitions/IDtype"}, "File": {"type": "array","items": {"$ref": "#/definitions/File"}}}, "required": ["File"], "additionalProperties": false}, "File": { "type": "object", "properties": { "FileName": {"type": "string"}, Takahashi, et al. Expires January 18, 2019 [Page 50] Internet-Draft JSON-IODEF July 2018 "FileSize": {"type": "integer"}, "FileType": {"type": "string"}, "URL": {"type": "array","items": {"$ref": "#/definitions/URLtype"}}, "HashData": {"$ref": "#/definitions/HashData"}, "Signature": {"type": "array","items": {"type": "string"}}, "AssociatedSoftware": {"$ref": "#/definitions/SoftwareType"}, "FileProperties": { "type":"array","items":{"$ref":"#/definitions/ExtensionType"}}}, "required": [], "additionalProperties": false}, "HashData": { "type": "object", "properties": { "scope": {"enum": ["file-contents","file-pe-section","file-pe-iat", "file-pe-resource","file-pdf-object","email-hash", "email-hash-header","email-hash-body"]}, "HashTargetID": {"type": "string"}, "Hash": {"type": "array","items": {"$ref": "#/definitions/Hash"}}, "FuzzyHash": { "type": "array","items": {"$ref": "#/definitions/FuzzyHash"}}}, "required": ["scope"], "additionalProperties": false}, "Hash": { "type": "object", "properties": { "DigestMethod": {"type": "string"}, "DigestValue": {"type": "string"}, "CanonicalizationMethod": {}, "Application": {"$ref": "#/definitions/SoftwareType"}}, "required": ["DigestMethod","DigestValue"], "additionalProperties": false}, "FuzzyHash": { "type": "object", "properties": { "FuzzyHashValue": { "type": "array","items": {"$ref": "#/definitions/ExtensionType"}}, "Application": {"$ref": "#/definitions/SoftwareType"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["FuzzyHashValue"], "additionalProperties": false}, "Indicator": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "IndicatorID": {"$ref": "#/definitions/IndicatorID"}, "AlternativeIndicatorID": { "type": "array", Takahashi, et al. Expires January 18, 2019 [Page 51] Internet-Draft JSON-IODEF July 2018 "items": {"$ref": "#/definitions/AlternativeIndicatorID"}}, "Description": {"type": "array","items": {"type": "string"}}, "StartTime": {"$ref": "#/definitions/DATETIME"}, "EndTime": {"$ref": "#/definitions/DATETIME"}, "Confidence": {"$ref": "#/definitions/Confidence"}, "Contact": { "type": "array","items": {"$ref": "#/definitions/Contact"}}, "Observable": {"$ref": "#/definitions/Observable"}, "uid-ref": {"type": "string"}, "IndicatorExpression":{"$ref":"#/definitions/IndicatorExpression"}, "IndicatorReference": {"$ref": "#/definitions/IndicatorReference"}, "NodeRole": { "type": "array","items": {"$ref": "#/definitions/NodeRole"}}, "AttackPhase": { "type": "array","items": {"$ref": "#/definitions/AttackPhase"}}, "Reference": { "type": "array","items": {"$ref": "#/definitions/Reference"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["IndicatorID"], "additionalProperties": false}, "IndicatorID": { "type": "object", "properties": { "id": {"type": "string"}, "name": {"type": "string"}, "version": {"type": "string"}}, "required": ["name","version"], "additionalProperties": false}, "AlternativeIndicatorID": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "IndicatorReference": { "type": "array", "items": {"$ref": "#/definitions/IndicatorReference"}}}, "required": ["IndicatorReference"], "additionalProperties": false}, "Observable": { "type": "object", "properties": { "restriction": {"$ref": "#/definitions/restriction"}, "ext-restriction": {"type": "string"}, "System": {"$ref": "#/definitions/System"}, "Address": {"$ref": "#/definitions/Address"}, "DomainData": {"$ref": "#/definitions/DomainData"}, "EmailData": {"$ref": "#/definitions/EmailData"}, "Service": {"$ref": "#/definitions/Service"}, Takahashi, et al. Expires January 18, 2019 [Page 52] Internet-Draft JSON-IODEF July 2018 "WindowsRegistryKeysModified": { "$ref": "#/definitions/WindowsRegistryKeysModified"}, "FileData": {"$ref": "#/definitions/FileData"}, "CertificateData": {"$ref": "#/definitions/CertificateData"}, "RegistryHandle": {"$ref": "#/definitions/RegistryHandle"}, "RecordData": {"type": "array", "item": {"$ref": "#/definitions/Record"}}, "EventData": {"$ref": "#/definitions/EventData"}, "Incident": {"$ref": "#/definitions/Incident"}, "Expectation": {"$ref": "#/definitions/Expectation"}, "Reference": {"$ref": "#/definitions/Reference"}, "Assessment": {"$ref": "#/definitions/Assessment"}, "DetectionPattern": {"$ref": "#/definitions/DetectionPattern"}, "HistoryItem": {"$ref": "#/definitions/HistoryItem"}, "BulkObservable": {"$ref": "#/definitions/BulkObservable"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "BulkObservable": { "type": "object", "properties": { "type": {"enum": ["asn","atm","e-mail","ipv4-addr","ipv4-net", "ipv4-net-mask","ipv6-addr","ipv6-net","ipv6-net-mask", "mac","site-url","domain-name","domain-to-ipv4", "domain-to-ipv6","domain-to-ipv4-timestamp", "domain-to-ipv6-timestamp","ipv4-port","ipv6-port", "windows-reg-key","file-hash","email-x-mailer", "email-subject","http-user-agent","http-request-url", "mutex","file-path","user-name","ext-value"]}, "ext-type": {"type": "string"}, "BulkObservableFormant":{ "$ref": "#/definitions/BulkObservableFormat"}, "BulkObservableList": {"type": "array", "item":{"type": "string"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "BulkObservableFormat": { "type": "object", "properties": { "Hash": {"$ref": "#/definitions/Hash"}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "IndicatorExpression": { "type": "object", "properties": { "operator": {"enum": ["not","and","or","xor"]}, "ext-operator": {"type": "string"}, Takahashi, et al. Expires January 18, 2019 [Page 53] Internet-Draft JSON-IODEF July 2018 "IndicatorExpression": { "type": "array", "items": {"$ref": "#/definitions/IndicatorExpression"}}, "Observable": { "type": "array","items": {"$ref": "#/definitions/Observable"}}, "uid-ref": {"type": "string"}, "IndicatorReference": { "type": "array", "items": {"$ref": "#/definitions/IndicatorReference"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}, "IndicatorReference": { "type": "object", "properties": { "uid-ref": {"type": "string"}, "euid-ref": {"type": "string"}, "version": {"type": "string"}}, "required": [], "additionalProperties": false}, "AttackPhase": { "type": "object", "properties": { "AttackPhaseID": {"type": "array","items": {"type": "string"}}, "URL": {"type": "array","items": {"$ref": "#/definitions/URLtype"}}, "Description": {"type": "array","items": {"type": "string"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": [], "additionalProperties": false}}, "title": "IODEF-Document", "description": "JSON schema for IODEF-Document class", "type": "object", "properties": { "version": {"type": "string"}, "lang": {"$ref": "#/definitions/lang"}, "format-id": {"type": "string"}, "private-enum-name": {"type": "string"}, "private-enum-id": {"type": "string"}, "Incident": { "type": "array","items": {"$ref": "#/definitions/Incident"}}, "AdditionalData": {"$ref":"#/definitions/ExtensionTypeList"}}, "required": ["version","Incident"], "additionalProperties": false} Figure 3: JSON schema Takahashi, et al. Expires January 18, 2019 [Page 54] Internet-Draft JSON-IODEF July 2018 Authors' Addresses Takeshi Takahashi National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei, Tokyo 184-8795 Japan Phone: +81 42 327 5862 Email: takeshi_takahashi@nict.go.jp Roman Danyliw CERT, Software Engineering Institute, Carnegie Mellon University 4500 Fifth Avenue Pittsburgh, PA USA Email: rdd@cert.org Mio Suzuki National Institute of Information and Communications Technology 4-2-1 Nukui-Kitamachi Koganei, Tokyo 184-8795 Japan Email: mio@nict.go.jp Takahashi, et al. Expires January 18, 2019 [Page 55]