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asprext

This project arose as a result of my work on analysis of x86-targeted anti-piracy software: ASProtect v1.6/1.7. On that time ASProtect seemed to be a quite decent piece of software, which (among other means) extensively used various VM emulation techniques to guard important parts of the protected target like: crucial parts of code, Original Entry Point (OEP) location, imports calls etc.

asprext is a WindDbg extension consisting of a set of tools, which I wrote for the purpose of my analysis allowing effectively reverse engineering this software.

NOTE: Since I have no more time (and interest) to further work on this, I abandoned the project. If someone is interested in this topic and wants to continue work on it, feel free to contact me.

Notes

Some notes on the directories structure:

  • .\analysis contains my annotated disassembly notes and other files helpful during the analysis.

  • .\script contains set of WindDbg unpacking scripts. The main script is .\script\main launched by:

    0:000> $$>a< main mod_base

    where mod_base specifies an address of unpacked, ASPR-protected module.

    NOTE: The scripts extensively use other of my WinDbg extensions: dumpext and scriptext, therefore they may serve as an illustration of usage of those extensions.

    https://github.com/pstolarz/dumpext
    https://github.com/pstolarz/scriptext

  • .\test contains some x86 apps, ASPR protected (on various level of protection), and unpacked versions of them. Used for testing the extension.

  • The rest constitutes the project sources. For x86 disassembly BSD-licensed NASM code has been used (slightly patched):

    http://www.nasm.us

Disclaimer

THE PROJECT IS MEANT FOR EDUCATIONAL PURPOSE ONLY. THE AUTHOR TAKES NO RESPONSIBILITY OR LIABILITY CAUSED BY USING THIS SOFTWARE FOR ANY OTHER PURPOSES.

License

GNU GENERAL PUBLIC LICENSE v2. See LICENSE file for details.