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Water Gamayun Group is actively exploiting Windows MMC vulnerability to deliver hidden PowerShell payloads and final malware loaders.
The analytic detects potential MSC EvilTwin loader exploitation, which manipulates directory paths with spaces to bypass security controls. The technique, described as CVE-2025-26633, involves crafting malicious MSC files that leverage MUIPath parameter manipulation. This detection focuses on suspicious MSC file execution patterns with unconventional command-line parameters, particularly those containing unusual spaces in Windows System32 paths or suspicious additional parameters after the MSC file. If confirmed malicious, this behavior could allow an attacker to execute arbitrary code with elevated privileges through DLL side-loading or path traversal techniques.
