PowerShell AMSI Bypass Attempt via Reflection or Memory Patch

Ankit Mehta@Secvyn

•updated Jun 27, 2026•0•0•1

Detects attempts to bypass the Antimalware Scan Interface (AMSI) in PowerShell processes. This is achieved by monitoring command-line arguments for keywords associated with memory patching or reflection techniques, such as modifying AmsiScanBuffer, AmsiUtils, or interacting with amsi.dll to neutralize security scanning.