SNOWLIGHT RWX Memory Allocation and APC Injection via VirtualProtect

Ibrahim Saud@tektrix

•updated Jun 28, 2026•0•0•1

Detects cross-process activity (such as process injection or handle access) initiated by the Windows Update service (wusvc.exe) where the executable is not digitally signed by Microsoft Corporation. This behavior is highly suspicious as the legitimate wusvc.exe should always be signed by Microsoft, and this may indicate process masquerading or a compromised service binary.