Hex-Rays OLLVM Deobfuscator and MicroCode Explorer

Original by Rolf Folles Ported from https://github.com/RolfRolles/HexRaysDeob

Reference: https://www.hex-rays.com/blog/hex-rays-microcode-api-vs-obfuscating-compiler/

• Implements all options in a menu item on pseudo code view

• Allows to runtime enable/disable the deobfuscator

• After enable/disable press F5 again in the pseuco code view to refresh

This uses the new C++ plugin API so it's only >= IDA 7.5 compatible

Based on IDA SDK ht_view sample plugin

Alternative microcode explorer with different features is Lucid

• https://github.com/gaasedelen/lucid

• https://blog.ret2.io/2020/09/11/lucid-hexrays-microcode-explorer/

Build

The default Makefile is for macOS version. Windows and Linux versions available per original project.

Mac build

Edit the Makefile and fix the IDA paths if necessary.

To compile and install 64 bit version:

EA=1 make
EA=1 make install

To compile and install 32 bit version:

EA=0 make
EA=0 make install

Linux build

To compile and install 64 bit version:

EA=1 IDA_DIR=<PATH_TO_IDA> IDA_SDK=<PATH_TO_IDA_SDK> make -f makefile.lnx
EA=1 IDA_DIR=<PATH_TO_IDA> IDA_SDK=<PATH_TO_IDA_SDK> make install -f makefile.lnx

To compile and install 32 bit version:

EA=0 IDA_DIR=<PATH_TO_IDA> IDA_SDK=<PATH_TO_IDA_SDK> make -f makefile.lnx
EA=0 IDA_DIR=<PATH_TO_IDA> IDA_SDK=<PATH_TO_IDA_SDK> make install -f makefile.lnx

Windows build

Open the Visual Studio project and hope for the best. Didn't test :-)

IDA SDK References

• Augmenting IDA UI with your own actions

Deobfuscation references

• Deobfuscation: recovering an OLLVM-protected program

• Defeating Compiler-Level Obfuscations Used in APT10 Malware

• Reverse Engineering Snapchat (Part I): Obfuscation Techniques

• SATURN Software deobfuscation framework based on LLVM

• Binary Deobfuscation: Preface

• Dissecting LLVM Obfuscator Part 1