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C# PoC implementation for bypassing AMSI via in memory patching

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AmsiBypass

C# PoC implementation for bypassing AMSI via in memory patching

Apply memory patching as described by Cyberark here:
https://www.cyberark.com/threat-research-blog/amsi-bypass-redux/

Write-Up on how to weaponize this with PowerShell can be found here:
http://ha.cker.info/weaponizing-amsi-bypass-with-powershell/

PoC execution

  • Build dll
  • Invoke it
  • Apply patch
  • ???
  • Profit!

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C# PoC implementation for bypassing AMSI via in memory patching

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