CrowdStrike 2026 Global Threat Report: The definitive threat intelligence report for the AI era Download report
Umbral Bison
Discover the adversaries targeting your industry
Back to Adversary Universe
Active since at least 2017 and previously tracked as the RepeatingUmbra activity cluster, UMBRAL BISON is likely a Belarus-based, state-nexus targeted intrusion adversary. UMBRAL BISON highly likely conducts intelligence-collection operations and enables information operations (IO). The adversary’s target scope suggests they support the Belarusian government’s interests; their intelligence-collect...
-
Umbral Bison
-
Belarus, Eastern Europe, Europe
Community Identifiers
UNC1151, FrostyNeighbor, UAC-0057, White Lynx
Objective
Intelligence Gathering
Motivation
State-Sponsored
Who's targeting your industry?
Today's adversaries are faster, smarter, and better resourced. Know who they are and how to stop them.
View adversaries
CrowdStrike 2025 Threat Hunting Report
Adversaries weaponize and target AI at scale.
