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hunting-from-a-threat-intel-report

Operationalizes a threat intelligence report into hunts: extracting IOCs and TTPs, mapping behaviors to ATT&CK and available telemetry, prioritizing durable behavioral indicators over volatile atomic ones, and producing concrete hunt queries. Activates for requests to hunt from a threat report, operationalize CTI, or turn an intel report into detections.

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포함된 파일(4)

  • SKILL.md3.1 KB
  • LICENSE340 B
  • references/api-reference.md1.0 KB
  • scripts/analyst.py2.8 KB

SKILL.md(원문)

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Hunting from a Threat Intel Report

When to Use

  • You received a CTI report (vendor writeup, ISAC bulletin, IR report) and must operationalize it.
  • You want to convert narrative TTPs and IOC lists into concrete hunts against your telemetry.
  • You need to prioritize which indicators are worth hunting given they age at different rates.

Do not use an IOC blocklist as the whole engagement — atomic indicators (hashes, IPs) are trivially changed; durable value comes from hunting the behaviors (TTPs).

Prerequisites

  • The report and a way to extract its IOCs and behavioral claims.
  • Knowledge of your telemetry coverage to judge which TTPs are huntable.

Workflow

Step 1: Extract IOCs and TTPs

Pull atomic indicators (hashes, IPs, domains, URLs) and the behavioral TTPs (the report's "how"). Defang/normalize indicators for safe handling.

python scripts/analyst.py extract report.txt

Step 2: Map to ATT&CK and the Pyramid of Pain

Tag behaviors with techniques and rank indicators by the Pyramid of Pain — prioritize TTPs and tools over hashes/IPs because they cost the adversary more to change.

Step 3: Check telemetry feasibility

For each TTP, confirm you have the data source to hunt it; note gaps as detection-engineering work.

Step 4: Build concrete hunts

Translate the high-value TTPs into queries (Sysmon, DNS, proxy, EDR), and sweep atomic IOCs as a quick first pass for current presence.

Step 5: Execute, document, and feed back

Run the hunts, record findings/gaps/negatives, escalate hits to IR, and convert durable logic into detections (Sigma).

Validation

  • Both atomic IOCs and behavioral TTPs are extracted, not just the indicator list.
  • Hunts target the highest-pain indicators feasible with your telemetry.
  • Each TTP maps to a real data source or is logged as a coverage gap.

Pitfalls

  • Stopping at IOC sweeps; the adversary rotates them and you miss the campaign.
  • Hunting TTPs you have no telemetry for, producing false confidence.
  • Failing to defang indicators, risking accidental execution/clicks.

References

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