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CRITICAL
Threat Intel
US Targets Russian-Linked UNC5792, UNC4221 Hackers of Messaging Apps
US State Dept. offers $10M for info on Russian-linked UNC5792 & UNC4221 groups targeting WhatsApp, Signal users. Learn about nation-state threats.
Runtime Rebel Intel
4 min read·Jun 29, 2026
TH
CRITICAL
Threat Intel
UNC5792 & UNC4221 Target US Officials via Messaging Apps
Russian state-linked groups UNC5792 and UNC4221 are actively targeting US government, military, and allied personnel through evolving messaging app attacks. Learn their
Runtime Rebel Intel
4 min read·Jun 29, 2026