Also tracked 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.
Derived from MITRE ATT&CK's own description text for this group — not a confirmed, exhaustive targeting assessment.
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Surfaced when a technique used by this actor maps to a tracked CISA KEV entry.
Derived from MITRE's own published description text, never asserted beyond it.
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