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Hidden Bear, also referred to as HiddenArt, is a telecommunications signaling threat group assessed to have ties to the Russian government. The group is associated with abuse of Signalling System 7 (SS7) weaknesses to conduct mobile-network surveillance operations on a global scale. Reported activity includes periodic reconnaissance against mobile networks, exploitation of signaling infrastructure, and use of spoofed mobile network nodes to obscure attack origin. Its operations have been linked to tracking targets and intercepting mobile communications, including activity directed at Russian dissidents and high-profile individuals. The group’s tradecraft is consistent with state-aligned espionage focused on covert collection through telecommunications infrastructure rather than conventional endpoint malware deployment.
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Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Attributed origin per open-source reporting.
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Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
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