Threats Tagged 'matrix protocol'

Toy Ghouls, a financially motivated group targeting Russian organizations since 2025, has deployed custom backdoors for the first time. Two versions were identified: mqtt-bird-agent using HiveMQ MQTT broker and matrix-bird-agent using Element messenger as command and control infrastructure. The backdoors are delivered via Windows Remote Management (WinRM) using tools like Evil-WinRM and WinRM-fs. They establish persistence as Windows services, encrypt configuration files using ChaCha20-Poly1305 algorithm, and execute commands via PowerShell or command line. The backdoors collect system metrics including CPU load, memory, and disk usage, and communicate with attackers through unconventional channels. This represents a significant evolution from their previous reliance on public GitHub tools and leaked ransomware builders to custom-developed malware.

European governments are transitioning from encrypted messaging applications like Signal and WhatsApp to sovereign Matrix-based solutions. This shift follows successful phishing campaigns, primarily attributed to Russian intelligence services, exploiting Signal's linked devices feature to gain persistent access to political communications. While Signal was initially recommended for external communications, scope creep led to its widespread use for sensitive statecraft discussions. Matrix-based systems offer advantages including federated architecture, government-controlled identity platforms, and customizable data retention policies. However, these homegrown solutions introduce new security vulnerabilities and implementation challenges. The walled-garden nature of current sovereign systems limits their utility for international diplomacy, suggesting Signal will continue to be used for communications with external parties despite the security concerns.

MediumMalwareUnited StatesBelgiumFrance+2#fast16#phishing attacks#sovereign messaging