MISP taxonomy format
draft-dulaunoy-misp-taxonomy-format-07

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Network Working Group                                        A. Dulaunoy
Internet-Draft                                                 A. Iklody
Intended status: Informational                                     CIRCL
Expires: October 10, 2019                                  April 8, 2019

                          MISP taxonomy format
                 draft-dulaunoy-misp-taxonomy-format-07

Abstract

   This document describes the MISP taxonomy format which describes a
   simple JSON format to represent machine tags (also called triple
   tags) vocabularies.  A public directory of common vocabularies called
   MISP taxonomies is available and relies on the MISP taxonomy format.
   MISP taxonomies are used to classify cyber security events, threats,
   suspicious events, or indicators.

Status of This Memo

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   This Internet-Draft will expire on October 10, 2019.

Copyright Notice

   Copyright (c) 2019 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
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Dulaunoy & Iklody       Expires October 10, 2019                [Page 1]
Internet-Draft            MISP taxonomy format                April 2019

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Conventions and Terminology . . . . . . . . . . . . . . .   3
   2.  Format  . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  predicates  . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  values  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.4.  optional fields . . . . . . . . . . . . . . . . . . . . .   4
       2.4.1.  colour  . . . . . . . . . . . . . . . . . . . . . . .   4
       2.4.2.  description . . . . . . . . . . . . . . . . . . . . .   5
       2.4.3.  numerical_value . . . . . . . . . . . . . . . . . . .   5
   3.  Directory . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Sample Manifest . . . . . . . . . . . . . . . . . . . . .   7
   4.  Sample Taxonomy in MISP taxonomy format . . . . . . . . . . .   7
     4.1.  Admiralty Scale Taxonomy  . . . . . . . . . . . . . . . .   7
     4.2.  Open Source Intelligence - Classification . . . . . . . .   9
     4.3.  Available taxonomies in the public directory  . . . . . .  11
   5.  JSON Schema . . . . . . . . . . . . . . . . . . . . . . . . .  20
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  23
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  23
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  23
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  23
     7.3.  URIs  . . . . . . . . . . . . . . . . . . . . . . . . . .  23
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  24

1.  Introduction

   Sharing threat information became a fundamental requirements on the
   Internet, security and intelligence community at large.  Threat
   information can include indicators of compromise, malicious file
   indicators, financial fraud indicators or even detailed information
   about a threat actor.  While sharing such indicators or information,
   classification plays an important role to ensure adequate
   distribution, understanding, validation or action of the shared
   information.  MISP taxonomies is a public repository of known
   vocabularies that can be used in threat information sharing.

   Machine tags were introduced in 2007 [machine-tags] to allow users to
   be more precise when tagging their pictures with geolocation.  So a
   machine tag is a tag which uses a special syntax to provide more
   information to users and machines.  Machine tags are also known as
   triple tags due to their format.