Water Gamayun exploits the MSC EvilTwin vulnerability for cyber espionage and data theft.
Analyst brief
Water Gamayun exploits the MSC EvilTwin zero-day vulnerability for system compromise and data exfiltration. While their specific targets are not detailed, their focus appears to be on cyber espionage and information theft. Their primary TTPs include custom payloads delivered via signed Microsoft Installer files, LOLBins for persistence, and backdoors/infostealers such as SilentPrism, DarkWisp, Stealc, and Rhadamanthys. Defenders should monitor for anomalous MSC file execution, scrutinize signed MSI payloads, and hunt for C2 patterns tied to advanced data exfiltration techniques.
Water Gamayun
unknown
Water Gamayun exploits the MSC EvilTwin zero-day vulnerability to compromise systems and exfiltrate data, utilizing custom payloads and advanced data exfiltration techniques. Their arsenal includes backdoors like SilentPrism and DarkWisp, as well as information stealers such as Stealc and Rhadamanthys. They employ delivery methods like provisioning malicious payloads through signed Microsoft Installer files and leveraging LOLBins to maintain persistence and control over infected systems. Comprehensive analysis of their command-and-control infrastructure reveals sophisticated evasion techniques and dynamic control capabilities.