ADVobfuscator demonstates how to use C++11 language to generate, at compile time, obfuscated code without using any external tool and without modifying the compiler. The technics presented rely only on C++11, as standardized by ISO. It shows also how to introduce some form of randomness to generate polymorphic code and it gives some concrete examples like the encryption of strings literals and the obfuscation of calls using finite state machines.
ADVobfuscator code has been updated for Visual Studio 2015. ADVobfuscator is now compatible with the RTM release of Visual Studio 2015 (previous versions or CTP releases are not). The whitepaper is not yet updated. The code has also been modified in order to avoid problems with O3 optimization and GCC. GCC with O3 defeats obfuscation (because it optimizes too much) and sometimes generates wrong code (not clear yet if it is a bug in GCC or in ADVobfuscator).
You have to install Boost library (www.boost.org) in order to use ADVdetector (it is used by FSM). Alternatively, you can comment out lines related to ObfuscatCall* (includes and code) in main.cpp.
- Debian / Ubuntu: sudo apt-get install libboost-all-dev
- Mac OS X: brew install boost
ADVobfuscator has been tested with:
- Xcode (LLVM) 6.4 (7.0 beta is also working) under Mac OS X 10.10.4
- GCC 4.9.2 under Debian 8.1 (jessie)
- Visual Studio 2015 (14.0) under Windows 10
Other compilers are probably compatible if they are C++11 compliant.
- DetectDebugger.cpp Debugger detection, implemented for Mac OS X and iOS. It is used by ObfuscatedCallWithPredicate (FSM)
- DetectDebugger.h Debugger detection, declaration
- Indexes.h Generate list of indexes at compile time (0, 1, 2, ... N)
- Log.h Helper to log messages
- MetaFactorial.h Compute factorial at compile time
- MetaFibonacci.h Compute fibonacci sequence at compile time
- MetaFSM.h Template to generate Finite State Machines at compile time
- MetaRandom.h Generate a pseudo-random number at compile time
- MetaString1.h Obfuscated string - version 1
- MetaString2.h Obfuscated string - version 2 - Remove truncation
- MetaString3.h Obfuscated string - version 3 - Random key
- MetaString4.h Obfuscated string - version 4 - Random encryption algorithm
- ObfuscatedCall.h Obfuscate function call
- ObfuscatedCallWithPredicate.h Obfuscate function call, execute a FSM based on a predicate (such as DetectDebugger)
- main.cpp Samples
- ADVobfuscator.xcodeproj Project for Apple Xcode
- Makefile Simple makefile for GCC
- ADVobfuscator.sln Visual Studio 2015 Solution
Written by Sebastien Andrivet
Copyright (c) 2010-2015 - Sebastien Andrivet All rights reserved.
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