APT29 (Cozy Bear / Midnight Blizzard)
Russia SVR-linked threat group (APT29 / Cozy Bear / Midnight Blizzard / Nobelium) known for SolarWinds, Microsoft 365 phishing and cloud identity attacks.
APT29 (Cozy Bear / Midnight Blizzard) is Russia's SVR-linked espionage group behind the SolarWinds SUNBURST supply-chain attack and sustained cloud identity hacking against government, tech and research organizations.
Definition
Advanced persistent threat attributed to Russia's Foreign Intelligence Service (SVR); specializes in stealthy cloud compromise, token theft, password spraying and supply-chain operations rather than disruptive malware.
Why It Matters / Profile
- Sponsorship: Russian Federation (SVR)
- Active since: 2008
- Aliases: Cozy Bear, Midnight Blizzard, Nobelium, The Dukes
Current Status
- Review status: published
- Last updated: 2026-08-26
- Evidence: 3 source(s) · 4 technique(s)
- Confidence: 91%
ATT&CK Techniques
Targets
- Government
- Technology
- Research
- Microsoft 365 tenants
Timeline
- 2008-01-01 — Attributed origins (approx.)
- 2019-10-01 — SolarWinds SUNBURST campaign begins
- 2024-01-12 — Microsoft confirms internal mailbox compromise
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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