AMSI Bypass: JIT WinScanContent Patch via RuntimeHelpers+VirtualProtect in PowerShell

Ibrahim Saud@tektrix

•updated Jun 29, 2026•0•0•8

This rule detects PowerShell command lines that contain indicators associated with AMSI (Antimalware Scan Interface) bypass techniques and low-level memory manipulation methods, such as 'VirtualProtect' and 'GetFunctionPointer' used in conjunction with 'RuntimeHelpers'. These techniques are commonly used by attackers to subvert defensive security mechanisms and execute malicious code in memory.