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threat actor

Head Mare

2 stories · 2 in the wild · August 9, 2026 – August 22, 2026

evidence: 2 observed

how they got in

  • software update 1 · Aug 9

sectors

  • government 1 · Aug 22
  • technology 1 · Aug 9

geography

  • cis 1 · Aug 22
  • russia 1 · Aug 22

malware and tools

  • phantomcore 1 · Aug 22

techniques

  • exploitation 1 · Aug 22
  • server breach 1 · Aug 9
  • trojanization 1 · Aug 9

attack phases seen

  • Initial access 2 · Aug 22
  • Execution 1 · Aug 22
  • Persistence 1 · Aug 9

what we reported, newest first, grouped by story

August 22, 2026

  • CISA ordered federal agencies to patch two actively exploited TrueConf Server flaws, the self-hosted conferencing platform widely deployed in Russia and CIS states (BleepingComputer). The Head Mare hacktivist group is exploiting the bugs to deploy PhantomCore malware (SecurityWeek). · Aug 22 · observed · Vulnerabilities & Exploits

August 9, 2026

  • Head Mare breached TrueConf video-conferencing servers to trojanize client installers, swapping legitimate downloads for backdoored versions by exploiting unpatched instances (BleepingComputer). · Aug 9 · observed · via software update · Threat Activity