Threat ActorHuman reviewed 2026-08-26 · Mandiant report 2013
APT1
Defense contractors; 141 companies
APT1 — Defense contractors; 141 companies (PLA Unit 61398-linked) (Source: Mandiant report 2013)
Definition
State-backed espionage group documented extensively since 2013
Why It Matters / Profile
- Sponsorship: PLA Unit 61398
- Active since: 2002
- Aliases: Comment Crew, Comment Group
Current Status
- Review status: published
- Last updated: 2026-08-26
- Evidence: 3 source(s) · 3 technique(s)
- Confidence: 85%
ATT&CK Techniques
Targets
- Defense contractors
- 141 companies
Timeline
- 2002 — APT1 activity first documented
- 2026-08-26 — Profile reviewed (Phase 45C)
Sources
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- Evidence — assertions mapped to verifiable references.
- Timeline — events in chronological order.
- Related Entities — CVE, threat actor, campaign, malware links.
- Sources — NVD, CISA KEV, MITRE ATT&CK, vendor advisories.
- Notes — your own observations and working hypotheses.
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