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Java bytecode analysis/deobfuscation tool

branch: master
README.md

JMD is a general purpose Java bytecode deobfuscation tool

Project Status

JMD has been discontinued due to lack of time and was last updated November 24, 2010. I will continue to monitor this repository so feel free to submit pull requests/issues at any time and I'll try to help you out. Obfuscators update often (at least the good ones do) with new algorithms and techniques so it is more than possible some of the transformers will crash or break code.

Usage

    java -jar JMD.jar <jarfile location> <transformer name> <debug true/false> <transformer specific args>

JMDGUI.exe provides an optional frontend to the command line interface.

Examples

Remove ZKM obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" zkm true
Remove Allatori obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" allatori true
Remove Allatori-Strong obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" allatori-strong true
Remove JShrink obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" jshrink true
Remove DashO obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" dasho true
Remove SmokeScreen obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" smokescreen true
Remove Generic String obfuscation: java -jar JMD.jar "C:/Files/Magic.jar" genericstringdeobfuscator true

Find all instances of example.com: java -jar JMD.jar "C:/Files/Magic.jar" stringscanner "example.com" true
Replace all instances of example.com: java -jar JMD.jar "C:/Files/Magic.jar" stringreplacer "example.com" true "rscbunlocked.net"
Renamer (currently breaks code): java -jar JMD.jar "C:/Files/Magic.jar" renamer true
Correct stack issues: java -jar JMD.jar "C:/Files/Magic.jar" stackfixer true

Download

Stable releases: https://github.com/Contra/JMD/downloads

Latest release (most likely stable): Get the files from the repo

Requirements

JMD - Java 6 (hasn't been tested on anything else but should work)

JMDGUI - .NET 4 or higher

Tutorials

Identifying Java obfuscators: http://invokestatic.org/?p=62

Using JMD: http://invokestatic.org/?p=88

License

Copyright (c) 2011 Contra contra@australia.edu

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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