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Anthropic-Cybersecurity-Skills/skills/collecting-threat-intelligence-with-misp/references/standards.md
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Standards and Frameworks Reference

MISP Standards

MISP Core Format

  • MISP JSON Format: Native event format used for synchronization between instances
  • MISP Galaxy: Cluster-based knowledge base linked to MITRE ATT&CK, threat actors, tools
  • MISP Taxonomies: Machine-readable tagging schemes (TLP, PAP, admiralty-scale, OSINT)
  • MISP Warninglists: Lists of well-known indicators to reduce false positives (Alexa Top 1M, Office 365 IPs)

STIX 2.1 (Structured Threat Information Expression)

  • Standard language for representing cyber threat intelligence
  • MISP supports import/export of STIX 2.1 bundles
  • Object types: Indicator, Malware, Threat Actor, Attack Pattern, Campaign, Observed Data
  • Relationship types: uses, targets, attributed-to, indicates, mitigates

TAXII 2.1 (Trusted Automated Exchange of Intelligence Information)

  • Transport protocol for sharing CTI over HTTPS
  • MISP can consume TAXII feeds and serve as a TAXII server
  • Collection-based model: discovery, API root, collections, objects
  • Supports pagination and filtering by added_after, type, version

MITRE ATT&CK Integration

  • MISP Galaxy clusters map directly to ATT&CK techniques (T-codes)
  • Events can be tagged with ATT&CK tactics: Initial Access, Execution, Persistence, etc.
  • ATT&CK Navigator integration for visualizing technique coverage
  • Sub-technique support (e.g., T1566.001 - Spearphishing Attachment)

Traffic Light Protocol (TLP)

  • TLP:CLEAR (formerly TLP:WHITE): Unlimited disclosure
  • TLP:GREEN: Limited disclosure within community
  • TLP:AMBER: Limited disclosure within organization
  • TLP:AMBER+STRICT: Restricted to organization only
  • TLP:RED: Restricted to specific recipients only

Permissible Actions Protocol (PAP)

  • PAP:RED: Only passive actions (no external lookups)
  • PAP:AMBER: Active actions allowed but not against infrastructure
  • PAP:GREEN: Active actions allowed
  • PAP:CLEAR: Unlimited use

References