Do Son The U.S. offers a $10 million reward for UNC5792, a Russian FSB-linked group behind Signal and WhatsApp phishing of officials.
UNC5792
A sophisticated spear-phishing campaign using Signal targeted Armenian civil society and government in March 2025, linked to threat actor UNC5792.
A report from Google Threat Intelligence Group has revealed a coordinated effort by multiple Russia-aligned threat actors to compromise Signal Messenger accounts