gruntfuscator

Simple script to obfuscate Grunt strings

Adapted from: Fixing Some .NET Tradecraft

Implementation

• Random replace for 'Grunt' , 'Covenant' , and 'Stage'
• Hard-coded replace for 2 GUID strings

Usage

1. Install Cov
2. Head to Templates > GruntHTTP
3. Copy the Stager code into stager.cs
4. Copy the Executor code into executor.cs
5. Run the py scipt

python3 gruntfuscator.py stager.cs obf-stager.cs
python3 gruntfuscator.py executor.cs obf-executor.cs

6. Copy the contents of each back into the GUI's template

Finally, create your listener, then launcher(s).

Tips

• the Stager and Executor can be compiled in Visual Studio and ThreatCheck/DefenderCheck can be run on them
• Change the hard-coded replaces
• Add more strings to be replaced
• Throw in an AMSI bypass