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CyberRussia

Ember Bear

State-sponsored cyber threat groupTrackedPending verification

Also known as: UNC2589, Bleeding Bear, DEV-0586, Cadet Blizzard, Frozenvista, UAC-0056

CyberRUS
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Fact cardConfidence · Source
System
TypeState-sponsored cyber threat group
Alternative designationsUNC2589, Bleeding Bear, DEV-0586, Cadet Blizzard, Frozenvista, UAC-0056
ProliferationOrigin country only
Active since2020At least 2020Med[1]
MITRE ATT&CK IDG1003High[1]
Capabilities
ATT&CK techniques used47ATT&CK v20.1High[1]
Malware and toolsBloodHound, CrackMapExec, Impacket, ngrok, P.A.S. Webshell, PsExec, Rclone, reGeorg, Responder, Saint Bot, WhisperGate11 malware and tool entries linked in ATT&CKHigh[1]
Attribution and activity
Attributed sponsorRussia's GRU 161st Specialist Training Center, unit 29155High[1]
Notes
Ember Bear is a Russian state-sponsored cyber espionage group that has been active since at least 2020, linked to Russia's General Staff Main Intelligence Directorate (GRU) 161st Specialist Training Center (Unit 29155). Ember Bear has primarily focused operations against Ukrainian government and telecommunication entities, but has also operated against critical infrastructure entities in Europe and the Americas. Ember Bear conducted the WhisperGate destructive wiper attacks against Ukraine in early 2022. There is some confusion as to whether Ember Bear overlaps with another Russian-linked entity referred to as Saint Bear. At present available evidence strongly suggests these are distinct activities with different behavioral profiles. Description adapted from MITRE ATT&CK®, © The MITRE Corporation, used under the ATT&CK Terms of Use.
Summary

Ember Bear is a Russian state-sponsored cyber espionage group that has been active since at least 2020, linked to Russia's General Staff Main Intelligence Directorate (GRU) 161st Specialist Training Center (Unit 29155). Ember Bear has primarily focused operations against Ukrainian government and telecommunication entities, but has also operated against critical infrastructure entities in Europe and the Americas.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
Russia
Sources
  1. Ember Bear, Group G1003, MITRE ATT&CK
    Published/updated 2026-07-31 · Tier 2 · checked 2026-11-08
Change log
  • 2026-11-08 Entry created from MITRE ATT&CK Enterprise v20.1 (group G1003)