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This is a port of AMSI.fail,i modify the code to make it C# 5 compatible and can be executed on Windows 10 without installing any extra requirements.AMSI.fail itself generates obfuscated PowerShell snippets that break or disable AMSI for the current process.

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GetRektBoy724/LocalAMSI.Fail

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LocalAMSI.Fail

This is a port of AMSI.fail,i modify the code to make it C# 5 compatible and can be executed on Windows 10 without installing any extra requirements.For more info,visit amsi.fail github repo and visit amsi.fail live working PoC.

Usage

you can compile it using Windows 10's built-in csc.exe which is located on "C:\Windows\Microsoft.NET\Framework\<version>\csc.exe". you can also use the pre-compiled binary which is in a form of library/DLL.For the DLL,you can load it on powershell directly using [Reflection.Assembly]

Notes

  • This code is not flagged as malicious (idk why) nor the pre-compiled binary,so you can execute it anywhere you want.
  • the Pre-Compiled binary is not injected with anything malicious nor slipped with malicious code,so dont even think of me get a meterpreter shell from the computer you load the dll 😂
  • I call this "LocalAMSI.Fail" cause we dont need to access the AMSI.fail API to get the AMSI bypass,instead of that,we load the AMSI.fail code locally and generate the AMSI bypass locally
  • Cause i modify the AMSI Bypass a little,i create my own "Online" AMSI.Fail and you can access it by invoking the "OnlineAMSIFail.ps1" script or accessing my free website
  • You can deploy OnlineAMSIFail in your own server with the "OnlineAMSIFail.php"

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This is a port of AMSI.fail,i modify the code to make it C# 5 compatible and can be executed on Windows 10 without installing any extra requirements.AMSI.fail itself generates obfuscated PowerShell snippets that break or disable AMSI for the current process.

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