A simple proof of concept for Out-Of-Tree LLVM Pass binary target obfuscation.
This LLVM Pass splits BasicBlocks and insert some junk instructions in the new branch, making more complex the function graph, but without modifiying the original execution flow.
There is a lot of room for improvement. Do not use this project for production! This is easily defeated!
Download stable version of LLVM
* git clone https://github.com/llvm-mirror/llvm.git
* git checkout stable
Download clang into the cloned LLVM directory
* git clone --depth=1 --branch=google/stable https://github.com/llvm-mirror/clang
Then compile LLVM. Building LLVM takes a lot of memory so configure your cmake accordingly! My building steps are the following:
* cd [where_llvm_was_downloaded] && mkdir build && cd build
* cmake .. -DLLVM_USE_LINKER=gold -DCMAKE_BUILD_TYPE:STRING=Release -DLLVM_TARGETS_TO_BUILD:STRING="X86;ARM;AArch64" -DLLVM_INSTALL_UTILS=ON -DCMAKE_INSTALL_PREFIX=$HOME/llvm-stable
* make -j [n-1] # which n is the number of processors
* be patient
* make install
LLVM should be installed at $HOME/llvm-stable
* mkdir build # at root of this project
* cd build
* cmake .. -DLLVM_ROOT=$HOME/llvm-stable
* cd .. && make
* ./test.sh # create binaries using the IRobs pass