Ember Bear G1003
Also known as UNC2589, Bleeding Bear, DEV-0586, Cadet Blizzard, Frozenvista, UAC-0056.
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.
Documented targeting: Government, Telecommunications, Critical Infrastructure
Methodology
Relevance is a match on your industry sector and technology stack against the MITRE ATT&CK v19.1 group graph (174 groups, 821 software families, 56 campaigns). It is computed deterministically from that data, with no language model in the request path. It is a relevance match, not threat-intelligence probability data: it tells you which documented actors and techniques are worth emulating for an org like yours, not a forecast that any specific group will act.
TurboPentest can autonomously exercise 6 of 47 of this actor's documented techniques today (13%). 14 are out of scope for automated testing (social engineering, denial of service, physical).
+24 coming soonmore unlock with our internal pentesting agent, currently in private beta.
These counts are computed from the vendored MITRE ATT&CK graph and the published coverage map, and are reproducible from source.
In-scope techniques to emphasize
Known software
PsExec, Responder, Impacket, CrackMapExec, ngrok, BloodHound, P.A.S. Webshell, WhisperGate, Saint Bot, Rclone, reGeorg.
Emulate Ember Bear. Audit-Ready pentest, $99.
Finds nothing? Your next pentest is free. If a pentest surfaces zero actionable findings, we credit you a free re-pentest. Once per target; does not apply to retests or Recon. You always walk away with real findings or a free redo.
Launch this pentestFrequently asked questions
Who is Ember Bear (G1003)?
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.
What sectors does Ember Bear target?
Based on MITRE ATT&CK, Ember Bear has been observed targeting Government, Telecommunications, Critical Infrastructure.
Can TurboPentest test for Ember Bear?
TurboPentest can autonomously exercise 6 of 47 of this actor's documented techniques today. 24 more need internal or assumed-breach access (the Adversarial-Depth tier), and the rest are out of scope for automated testing.
What does it cost to emulate Ember Bear?
An Audit-Ready pentest starts at $99 per target. If it surfaces zero actionable findings, your next pentest is free.
Reviewed by
Michel Chamberland, Founder & CEO of IntegSec. CISSP, OSCP, OSCE, with 20+ years in offensive security, alumni of IBM X-Force Red and Trustwave SpiderLabs.
Last reviewed July 30, 2026.