NimDRM

Was presented at NorthSec 2023, available on Youtube

An experiment in improving existing anti-copy techniques. This one forces the payload to request the decryption key to a license server. This server decides to return the key depending on various anti-tampering and fingerprint checks

Any miscalculated move from the blue team and the license gets permanently banned, preventing complete behavior analysis.

For more information regarding Offensive developpment, see: [OffensiveNim](https://github.com/byt3bl33d3r/OffensiveNim)

How to use

• Install Nim on Linux
• Clone this repo
• Change values if desired, then compile Encrypt.nim
• Copy the output to NimDRM.nim, adjust the other settings and compile
• Start the python license server
• Execute the payload on arbitrary systems

How to cross-compile from Linux to Windows

• nim c -d=mingw -d=release --app=console --cpu=amd64 Encrypt.nim
• nim c -d=mingw -d=release --app=console --cpu=amd64 NimDRM.nim