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profiling-a-threat-actor-from-ttps

Profiles a threat actor by aggregating observed ATT&CK techniques into a TTP profile and comparing it against known-group technique sets to estimate similarity and candidate attribution. Activates for requests to profile a threat actor, compare observed TTPs to known groups, or estimate attribution from technique overlap.

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포함된 파일(4)

  • SKILL.md2.7 KB
  • LICENSE340 B
  • references/api-reference.md1.3 KB
  • scripts/analyst.py2.8 KB

SKILL.md(원문)

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Profiling a Threat Actor From TTPs

When to Use

  • You have a set of observed ATT&CK techniques from an intrusion and want to build a TTP profile and compare it against known-group technique sets for candidate attribution.
  • You are estimating similarity, not asserting attribution.

Do not use technique overlap as confirmed attribution — many groups share common techniques. Present candidates with similarity scores and the need for corroborating intel.

Prerequisites

  • Observed technique IDs from the intrusion and a reference of group→techniques (CSV/JSON).

Workflow

Step 1: Build the observed TTP profile

Collect the deduplicated set of observed ATT&CK technique IDs (including sub-techniques).

Step 2: Compare against known groups

python scripts/analyst.py compare --observed observed.txt --groups groups.json

Computes Jaccard and overlap-coefficient similarity between the observed set and each group's technique set, ranking candidate groups.

Step 3: Weigh distinctive techniques

Prioritize matches on less-common techniques (shared rare TTPs are stronger signals than ubiquitous ones).

Step 4: Document

Report ranked candidates with similarity scores, the overlapping techniques, and an explicit low/medium confidence — never definitive attribution from TTPs alone.

Validation

  • Similarity is computed on technique-ID sets (sub-techniques included).
  • Candidates are ranked by both Jaccard and overlap coefficient.
  • Output states confidence and lists the overlapping techniques.

Pitfalls

  • Over-attributing on common techniques (T1059, T1027) shared by most groups.
  • Reference group data being incomplete or out of date.
  • Treating a single high overlap as proof without corroborating intel.

References

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