IETF                                                           B. Jordan
Internet-Draft                                      Symantec Corporation
Intended status: Informational                                A. Thomson
Expires: November 3, 2019                             LookingGlass Cyber
                                                                J. Verma
                                                           Cisco Systems
                                                            May 02, 2019

 Collaborative Automated Course of Action Operations (CACAO) for Cyber


   This is the charter for the Working Group: Collaborative Automated
   Course of Action Operations (CACAO) for Cyber Security

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
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   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on November 3, 2019.

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   Copyright (c) 2019 IETF Trust and the persons identified as the
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   include Simplified BSD License text as described in Section 4.e of

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

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Goals and Deliverables  . . . . . . . . . . . . . . . . . . .   3
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   To defend against threat actors and their tactics, techniques, and
   procedures, organizations need to manually identify, create, and
   document prevention, mitigation, and remediation steps.  These steps
   when grouped together into a course of action (COA) / playbook are
   used to protect systems, networks, data, and users.  The problem is,
   once these steps have been created there is no standardized and
   structured way to document them, verify they were correctly executed,
   or easily share them across organizational boundaries and technology

   This working group will create a standard that implements the
   playbook model for cybersecurity operations.

   This solution will specifically enable:

   1.  the creation and documentation of COAs in a structured machine-
       readable format

   2.  organizations to perform attestation including verification and
       authentication on COAs

   3.  the sharing and distribution of COAs across organizational
       boundaries and technology stacks that may include protocols,
       apis, interfaces and other related technology to support sharing.

   4.  the verification of COA correctness prior to deployment.

   5.  the monitoring of COA activity after successful deployment.

   This solution will contain (at a minimum) a standard JSON based data
   model, a defined set of functional capabilities and associated
   interfaces, and a protocol.  This solution will also provide a data
   model for systems to confirm the status of the COA execution,
   however, it will be agnostic of how the COA is implemented by the

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   Each collaborative course of action, such as recommended prevention,
   mitigation and remediation steps, will consist of a sequence of cyber
   defense actions that can be executed by the various systems that can
   act on those actions.  Further, these COAs will be coordinated and
   deployed across heterogeneous cyber security systems such that both
   the actions requested and the resultant outcomes may be verified.
   These COA actions will be referenceable in a data structure like the
   OASIS STIX V2 model that provides support for related data such as
   threat actors, campaigns, intrusion sets, malware, attack patterns,
   and other adversarial techniques, tactics, and procedures.

   Where possible the working group will consider existing efforts, like
   OASIS OpenC2 and IETF I2NSF that define the atomic actions to be
   included in a process or sequence.  The working group will not
   consider how shared actions are used/enforced, except where a
   response is expected for a specific action or step.

2.  Goals and Deliverables

   This working group has the following major goals and deliverables

   o  CACAO Use Cases and Requirements

      *  Specify the use cases and requirements

   o  CACAO Functional Architecture: Roles and Interfaces

      *  Specify the system functions and roles that are needed to
         enable Collaborative Courses of Action

   o  CACAO Protocol Specification

      *  Specify and standardize the configuration for at least one
         protocol that can be used to distribute courses of action in
         both a direct delivery and publish-subscribe method

   o  CACAO Distribution and Response Application Layer Protocol

      *  Specify the protocol which may include apis, interfaces and
         other related technology to support the requirements identified
         for the protocol.

   o  CACAO JSON Data Model

      *  Create a JSON data model that can capture and enable
         collaborative courses of action

   o  CACAO Interoperability Test Documents

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      *  Define and create a series of tests and documents to assist
         with interoperability of the various systems involved.

   The working group may decide to not publish the use cases and
   requirements; and test documents.  That decision will be made during
   the lifetime of the working group.

Authors' Addresses

   Bret Jordan
   Symantec Corporation
   350 Ellis Street
   Mountain View  CA 94043


   Allan Thomson
   LookingGlass Cyber
   10740 Parkridge Blvd, Suite 200
   Reston  VA 20191


   Jyoti Verma
   Cisco Systems
   170 West Tasman Dr.
   San Jose  CA 95134


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