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MasriyanMasriyan/gemini-security-skills/skills/threat-intel-fusion/SKILL.md

threat-intel-fusion

Skill4 starsChanged 5 months agoMITView on GitHub

Threat intelligence fusion skill for collecting, normalizing, deduplicating, enriching, and operationalizing IOCs and TTPs from OTX, MISP, abuse.ch, VirusTotal, Shodan, GreyNoise, Censys, CISA KEV, NVD, vendor blogs, and internal telemetry. Use to build STIX/TAXII feeds, ATT&CK-mapped actor profiles, prioritized blocklists, and detection-ready intel packages.

We split this skill into the rules it gives an agent

1 rule. About 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Prefer structured formats: STIX 2.1 objects, MISP events, ATT&CK technique IDs, CVE IDs, CPE strings.

    line 11

≈ “Common” is an estimate: at least 1 in 5 of the 308,232 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Threat Intel Fusion

Operating Rules

  • Separate observation, assessment, and recommendation. Tag every claim with source, date, and confidence.
  • Prefer structured formats: STIX 2.1 objects, MISP events, ATT&CK technique IDs, CVE IDs, CPE strings.
  • Decay IOC value over time; mark sightings, first/last seen, and TLP.

Fusion Workflow

  1. Collect: pull feeds with idempotent connectors; record raw payloads with hash and timestamp.
  2. Normalize: map to STIX SDOs and SROs (indicator, malware, intrusion-set, attack-pattern, relationship).
  3. Deduplicate: canonical-form domain/url/hash; merge by id + pattern, keep all sightings.
  4. Enrich: passive DNS, WHOIS, ASN, geo, VT, GreyNoise tags, sandbox verdicts, KEV/EPSS scores.
  5. Prioritize: score by exploitability, exposure in our environment, actor relevance, and decay.
  6. Operationalize: emit firewall/EDR/SIEM-ready artifacts plus Sigma rules and hunt queries.

Actor Profiling

  • Aliases, motivations, sectors, geographies, observed TTPs (ATT&CK), tooling, infrastructure patterns, recent campaigns, and likely next moves with confidence.

Output Contract

  • feeds/: raw + normalized snapshots.
  • iocs.stix.json: deduped STIX bundle with relationships.
  • priority.csv: indicator, score, reason, action, ttl.
  • actors/<name>.md: profile with sources.
  • detections/: Sigma, YARA, Suricata, KQL, SPL exports.
  • report.md: executive summary, what changed, what to action this week.

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