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Threats Tagged 'video conferencing'

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Threats Tagged 'video conferencing'

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PhantomCore and PhantomGraph backdoors delivered via an unpatched TrueConf server
0

The Head Mare APT group exploited unpatched vulnerabilities in TrueConf video conferencing servers to deploy PhantomCore and PhantomGraph backdoors. Attackers gained unauthorized access via port 4307/TCP, executing arbitrary code with SYSTEM privileges. They replaced legitimate client installers with infected versions and deployed a web shell for persistence. PhantomGraph used Microsoft OneDrive for command-and-control. Affected TrueConf versions include 5.3.x through 5.3.9, 5.4.x through 5.4.9, and 5.5.x through 5.5.5. Multiple Russian organizations across various industries were targeted. The vulnerabilities were patched in June 2026.

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