Themida-Unmutate : Mastering Deobfuscation Of Protected Software

A Python 3 tool to statically deobfuscate functions protected by Themida, WinLicense and Code Virtualizer 3.x’s mutation-based obfuscation.
The tool has been tested on Themida up to version 3.1.9. It’s expected to work on WinLicense and Code Virtualizer as well.

A Binary Ninja plugin is also available here.

Features

• Automatically resolve trampolines’ destination addresses
• Statically deobfuscate mutated functions
• Rebuild fully working binaries

Known Limitations

• Doesn’t support ARM64 binaries

How To Download

You can install the project with pip:

pip install themida-unmutate

A standalone PyInstaller build is available for Windows in “Releases”.

How To Use

Here’s what the CLI looks like:

$ themida-unmutate --help
usage: themida-unmutate [-h] -a ADDRESSES [ADDRESSES ...] -o OUTPUT [--no-trampoline] [--reassemble-in-place] [-v] protected_binary

Automatic deobfuscation tool for Themida's mutation-based protection

positional arguments:
  protected_binary      Protected binary path

options:
  -h, --help            show this help message and exit
  -a ADDRESSES [ADDRESSES ...], --addresses ADDRESSES [ADDRESSES ...]
                        Addresses of the functions to deobfuscate
  -o OUTPUT, --output OUTPUT
                        Output binary path
  --no-trampoline       Disable function unwrapping
  --reassemble-in-place
                        Rewrite simplified code over the mutated code rather than in a new code section
  -v, --verbose         Enable verbose logging