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tracking-adversary-infrastructure

Tracks adversary C2 and staging infrastructure by clustering indicators on shared attributes (TLS/JARM, certificate fields, favicon hashes, ASN, registration patterns) to find related hosts. Activates for requests to track adversary infrastructure, cluster C2 servers, or pivot on infrastructure attributes to find related hosts.

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Files included (4)

  • SKILL.md2.6 KB
  • LICENSE340 B
  • references/api-reference.md1.2 KB
  • scripts/analyst.py2.9 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Tracking Adversary Infrastructure

When to Use

  • You have a set of suspected C2/staging hosts with attributes (JARM/JA3S, TLS cert fields, favicon hash, ASN, ports, registrar) and want to cluster them to find related infrastructure.
  • You are expanding from a few known indicators to the adversary's broader footprint.

Do not use clustering as confirmed attribution — shared hosting/attributes can be coincidental. Corroborate before attributing.

Prerequisites

  • Host records (CSV/JSON) with shared-attribute fields to cluster on.

Workflow

Step 1: Cluster on shared attributes

python scripts/analyst.py cluster hosts.json --attrs jarm,cert_cn,favicon_hash,asn

Groups hosts that share one or more pivot attributes into clusters, defanging host indicators.

Step 2: Score cluster cohesion

Rank clusters by how many distinct attributes the members share (more shared attributes → stronger relationship).

Step 3: Expand and confirm

Use the strongest shared attributes (e.g., a unique self-signed cert CN or favicon hash) to pivot in internet-scan data for more hosts; corroborate.

Step 4: Document

Record clusters, the shared pivots, and confidence; feed confirmed indicators to detection.

Validation

  • Clustering keys on explicit shared attributes, not loose similarity.
  • Cluster strength reflects the count of distinct shared attributes.
  • Host indicators are defanged in output.

Pitfalls

  • Common CDN/cloud JARM/ASN values creating huge false clusters — exclude generic pivots.
  • Default certificates shared by unrelated servers.
  • Treating one weak shared attribute as a strong link.

References

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