Saint Bear
Essential information
- Confidence
- 100/100
- Published
- 16/12/2025 19:39
- Modified
- 27/03/2026 01:13
- Updated at
- 27/03/2026 01:13
- Revoked
- No
- Author / Source
- The MITRE Corporation
- Resource level
- —
- Primary motivation
- —
- Related entities
- 65 attack patterns (mitre), 5 malware, 1 countries, 23 indicators, 4 vulnerabilities (cve), 7 tool
Aliases
UNC2589 Bleeding Bear DEV-0586 Frozenvista Storm-0587 TA471 Lorec53 UAC-0056 Cadet Blizzard Ember Bear
Description
[Saint Bear](https://attack.mitre.org/groups/G1031) is a Russian-nexus threat actor active since early 2021, primarily targeting entities in Ukraine and Georgia. The group is notable for a specific remote access tool, [Saint Bot](https://attack.mitre.org/software/S1018), and information stealer, [OutSteel](https://attack.mitre.org/software/S1017) in campaigns. [Saint Bear](https://attack.mitre.org/groups/G1031) typically relies on phishing or web staging of malicious documents and related file types for initial access, spoofing government or related entities.(Citation: Palo Alto Unit 42 OutSteel SaintBot February 2022 )(Citation: Cadet Blizzard emerges as novel threat actor) [Saint Bear](https://attack.mitre.org/groups/G1031) has previously been confused with [Ember Bear](https://attack.mitre.org/groups/G1003) operations, but analysis of behaviors, tools, and targeting indicates these are distinct clusters.
Marking (TLP)
TLP:CLEAR Copyright 2015-2025, The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation.