profiling-threat-actor-groups

Imported from mukul975/anthropic-cybersecurity-skills (skills/profiling-threat-actor-groups/SKILL.md). Install upstream with npx skills add mukul975/anthropic-cybersecurity-skills --skill profiling-threat-actor-groups. Copyright stays with the author (Apache-2.0).

Profiling Threat Actor Groups

When to Use

Use this skill when:

• Updating the organization's threat model with profiles of adversary groups recently observed targeting your sector
• Preparing an executive briefing on APT groups that align with geopolitical events affecting your business
• Enabling SOC analysts to understand attacker objectives and TTPs to improve detection tuning

Do not use this skill for real-time incident attribution — attribution during active incidents should be deprioritized in favor of containment. Profile refinement occurs post-incident.

Prerequisites

• Access to MITRE ATT&CK Groups database (https://attack.mitre.org/groups/)
• Commercial threat intelligence subscription (Mandiant Advantage, CrowdStrike Falcon Intelligence, or Recorded Future)
• Sector-specific ISAC membership for targeted intelligence (FS-ISAC, H-ISAC, E-ISAC)
• Structured profile template (see workflow below)

Workflow

Step 1: Identify Relevant Threat Actors

Cross-reference your organization's sector, geography, and technology stack against known adversary targeting patterns. Sources:

• MITRE ATT&CK Groups: 130+ documented nation-state and criminal groups with TTP mappings
• CrowdStrike Annual Threat Report: adversary naming by nation-state (BEAR=Russia, PANDA=China, KITTEN=Iran, CHOLLIMA=North Korea)
• Mandiant M-Trends: annual report with sector-specific targeting statistics
• CISA Known Exploited Vulnerabilities (KEV) catalog: identifies vulnerabilities actively exploited by specific threat actors

Shortlist 5–10 groups most likely to target your organization based on sector alignment and recent activity.

Step 2: Collect Profile Data

For each adversary, document across standard dimensions:

Identity: ATT&CK Group ID (e.g., G0016 for APT29), aliases (Cozy Bear, The Dukes, Midnight Blizzard), suspected nation-state sponsor

Motivations: Espionage, financial gain, disruption, intellectual property theft

Targeting: Sectors, geographies, organization sizes, technology targets (OT/IT, cloud, supply chain)

Capabilities: Custom malware (e.g., APT29's SUNBURST, MiniDuke), exploitation of 0-days vs. known CVEs, supply chain attack capability

Campaign History: Notable operations with dates (SolarWinds 2020, Exchange Server 2021, etc.)

TTPs by ATT&CK Phase: Document top 5 techniques per tactic phase

Step 3: Map TTPs to ATT&CK

Using mitreattack-python:

from mitreattack.stix20 import MitreAttackData

mitre = MitreAttackData("enterprise-attack.json")
apt29 = mitre.get_object_by_attack_id("G0016", "groups")
techniques = mitre.get_techniques_used_by_group(apt29)

profile = {}
for item in techniques:
    tech = item["object"]
    tid = tech["external_references"][0]["external_id"]
    tactic = [p["phase_name"] for p in tech.get("kill_chain_phases", [])]
    profile[tid] = {"name": tech["name"], "tactics": tactic}

Step 4: Assess Detection Coverage Against Profile

Compare the adversary's technique list against your detection coverage matrix (from ATT&CK Navigator layer). Identify:

• Techniques used by this group where you have no detection (critical gaps)
• Techniques where you have partial coverage (logging but no alerting)
• Compensating controls where detection is not feasible (network segmentation as mitigation for lateral movement)

Step 5: Package Profile for Distribution

Structure the final profile for different audiences:

• Executive summary (1 page): Who, motivation, recent campaigns, top risk to our organization, recommended priority actions
• SOC analyst brief (3–5 pages): Full TTP list with detection status, IOC list, hunt hypotheses
• Technical appendix: YARA rules, Sigma detections, STIX JSON object for TIP import

Classify TLP:AMBER for internal distribution; seek ISAC approval before external sharing.

Key Concepts

Tools & Systems

• MITRE ATT&CK Groups: Free, community-maintained database of 130+ documented adversary groups with referenced campaign reports
• Mandiant Advantage Threat Intelligence: Commercial platform with detailed APT profiles, malware families, and campaign analysis
• CrowdStrike Falcon Intelligence: Commercial feed with adversary-centric profiles and real-time attribution updates
• Recorded Future Threat Intelligence: Combines OSINT, dark web, and technical intelligence for adversary profiling
• OpenCTI: Graph-based visualization of threat actor relationships, tooling, and campaign linkages

Common Pitfalls

• IOC-centric profiles: Building profiles around IP addresses and domains rather than TTPs means the profile becomes stale within weeks as infrastructure rotates.
• Vendor alias confusion: Conflating two different threat actor groups due to shared malware or infrastructure leads to incorrect threat model assumptions.
• Binary attribution: Treating attribution as certain when it is probabilistic. Always qualify attribution confidence level (Low/Medium/High).
• Neglecting insider and criminal groups: Overemphasis on nation-state APTs while ignoring ransomware groups (Cl0p, LockBit, ALPHV) which represent higher probability threats for most organizations.
• Profile staleness: Adversary TTPs evolve. Profiles not updated quarterly may miss technique changes, new malware, or targeting shifts.