APT37 NarwhalRAT: Python ctypes fileless PE injection with outbound C2
Detects execution of potentially malicious processes masquerading as 'pythonw.exe' or 'userscreen.exe', specifically when they exhibit behavior associated with the APT37 NarwhalRAT. The rule identifies processes loading critical system DLLs (kernel32.dll, ntdll.dll) while simultaneously initiating network connections to known C2 infrastructure within a 10-minute window.
Microsoft Sentinel (KQL)
