Original obfuscation passes including bogus control flow (-bcf), split basic block (-split), control flow flattening (-fla) and substitution (-sub) and MBA-substitution(-mba-subs) and Indirect-Call(-ind-call) and StringXor(-string-obfus) and ConstVarXor(-const-obfus) and VM-Flattening (-vm-fla).
https://github.com/gmh5225, 日天同学的llvm-msvc让人心情激动
https://github.com/gmh5225/awesome-llvm-security#ollvm
放弃TAG自动Build了，自己build吧
- 在vm-fla-sym添加反符号执行和反内存追踪
- vm-fla-enc 对vm-fla的部分数据加密
[ ] MBA-subs的bug[ ] 移植xVMP- 在vm-fla-enc中使用间接全局变量访问
- vm-fla-level 0~7 8个处理等级 7最强，0最弱，默认7
- 弱鸡vmp加入
- 添加combine功能
- 添加fla強化 x-fla-enh
- x-full 功能，在function上使用vm-fla-level=7
- 字符串加密等相似加了combine
- 自定義分割合併 combine_func[tag_number] 模式
[ ] x-var-rot 待处理- 新功能
- custom-cc 参数传递和返回值的方法
- anti-ida, copy from some other ollvm codes
- self build
- -rich for lld-link option to build pe with rich-header
- -x-pic for -fPIC in windows (-mllvm -x-pic -mllvm -xpic-global -mllvm -xpic-memset -mllvm -xpic-memcpy)
- -x-vmobf (next vm,vm_runtime is not public)
- new functions
llvm-msvc is a compiler based on LLVM that isn't limited by MSVC. The aim is to provide the same experience as MSVC on Windows. You can use naked functions anywhere and also add custom support like obfuscation.
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⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⣴⣶⣿⣿⣿⣿⣿⣿⣿⣿⠷⢦⠀⣹⣶⣿⣦⣿⡘⣇⠀⠀⠀⢰⠾⣿⣿⣿⣟⣻⣿⣿⣿⣷⣦⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠀⠀⠀⠀⢺⣿⣿⣿⣿⣿⣿⣿⣆⠀⠀⠀⠀⠀⠀⢹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣦⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
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⠀⠀⠀⠀⠀⢠⣾⣿⠟⣡⣾⣿⣿⣧⣿⡿⣋⣴⣿⣿⣿⣿⣧⠀⠀⠀⠀⠀⢻⣿⣿⣿⣶⡄⠙⠛⠁⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣷⣝⢻⣿⣟⣿⣿⣷⣮⡙⢿⣽⣆⠀⠀⠀⠀⠀
⠀⠀⠀⠀⢀⡿⢋⣴⣿⣿⣿⣿⣿⣼⣯⣾⣿⣿⡿⣻⣿⣿⣿⣦⠀⠀⠀⠀⢀⣹⣿⣿⣿⣿⣶⣤⠀⠀⠀⠀⠀⣰⣿⣿⣿⣿⠻⣿⣿⣿⣮⣿⣿⣿⣿⣿⣿⣦⡙⢿⣇⠀⠀⠀⠀
⠀⠀⠀⣠⡏⣰⣿⣿⡿⢿⣿⣿⣿⣿⣿⣿⡿⢋⣼⣿⣿⣿⣿⣿⣷⡤⠀⣠⣿⣿⣿⣿⣿⣿⣿⣿⣷⣄⠀⢠⣾⣿⣿⣿⣿⣿⣷⡜⢿⣿⣿⣿⣿⣿⣿⡿⠿⣿⣿⣦⡙⣦⠀⠀⠀
⠀⠀⣰⢿⣿⣿⠟⠋⣠⣾⣿⣿⣿⣿⣿⠛⢡⣾⡿⢻⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠻⣿⡟⣿⣿⣿⠻⢿⣿⣿⣿⣿⣿⣿⣿⣟⠻⣿⣆⠙⢿⣿⣿⣿⣿⣿⣦⡈⠻⣿⣿⣟⣧⠀⠀
⠀⣰⢣⣿⡿⠃⣠⡾⠟⠁⠀⣸⣿⡟⠁⢀⣿⠋⢠⣿⡏⣿⣿⣿⣿⣿⢿⠁⢀⣠⣴⢿⣷⣿⣿⣿⠀⠀⠽⢻⣿⣿⣿⣿⡼⣿⡇⠈⢿⡆⠀⠻⣿⣧⠀⠈⠙⢿⣆⠈⠻⣿⣎⢧⠀
⠀⢣⣿⠟⢀⡼⠋⠀⠀⢀⣴⠿⠋⠀⠀⣾⡟⠀⢸⣿⠙⣿⠃⠘⢿⡟⠀⣰⢻⠟⠻⣿⣿⣿⣿⣿⣀⠀⠀⠘⣿⠋⠀⣿⡇⣿⡇⠀⠸⣿⡄⠀⠈⠻⣷⣄⠀⠀⠙⢷⡀⠙⣿⣆⠁
⢀⣿⡏⠀⡞⠁⢀⡠⠞⠋⠁⠀⠀⠀⠈⠉⠀⠀⠀⠿⠀⠈⠀⠀⠀⠀⠀⣿⣿⣰⣾⣿⣿⣿⣿⣿⣿⣤⠀⠀⠀⠀⠀⠉⠀⠸⠃⠀⠀⠈⠋⠀⠀⠀⠀⠙⠳⢤⣀⠀⠹⡄⠘⣿⡄
⣸⡟⠀⣰⣿⠟⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠛⠿⠿⠿⠟⠁⠀⠹⣿⣷⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⣧⠀⢹⣷
⣿⠃⢠⡿⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣄⣤⣀⠀⠀⣿⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢻⡇⠀⣿
⣿⠀⢸⠅⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣰⡿⠋⠉⢻⣧⢀⣿⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⠀⢸
⡇⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢿⣧⡀⠀⠀⣿⣾⡟⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠀⢸
⢸⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⠿⣿⣿⠟⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡾
⠈⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣰⡿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠃
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢰⡏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣧⢀⣾⣤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⡼⣿⣿⣾⣤⣠⡼⠀⠀⠀
- Compatible with
MSVCsyntax as much as possible. - Improved
SEHstability. - Added some special Intrinsic functions(
__vmx_vmread/__vmx_write). - Supports
x64/ARM64windows drivers. - Supports
AArch64android GKI drivers. - Allows naked
X64inline asm. - Enables multiple cores compilation.
- Supports
/MPwhen precompiled headers are present. - Supports
/GL(LTO optimization).
Clangfollows theGCCstandard, whileMSVChas its own unique syntax.- Some of the code is pretty hacky. Can't submit it officially.
- Waiting for the official fix takes too long.
- Install Visual Studio 2015-2022 (I recommend using 2022) along with WDK11.
- Download and install llvm-msvc from the following repository llvm-msvc_X86_64_installer-PDB.exe.
- Create your Windows driver project and choose "LLVM-MSVC_v143_KernelMode" as your platform toolset.
- Compile your project.
X86：clang+lld+RelWithDebInfo
mkdir build-RelWithDebInfo-64
pushd build-RelWithDebInfo-64
cmake .. -G "Visual Studio 17 2022" -A X64 -DCMAKE_CXX_FLAGS="/utf-8" -DCMAKE_C_FLAGS="/utf-8" -DLLVM_ENABLE_RPMALLOC=ON -DLLDB_ENABLE_PYTHON=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_ENABLE_PROJECTS="clang;lld;lldb" -DCMAKE_INSTALL_PREFIX=E:\llvm\install-RelWithDebInfo-64 -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_OBFUSCATION_LINK_INTO_TOOLS=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_USE_CRT_RELEASE=MT ../llvm
msbuild /m -p:Configuration=RelWithDebInfo INSTALL.vcxproj
popd
mkdir build-release-64-clang
pushd build-release-64-clang
cmake .. -G "Visual Studio 17 2022" -T "LLVM-MSVC_v143" -A X64 -DCMAKE_CXX_FLAGS="/utf-8" -DCMAKE_C_FLAGS="/utf-8" -DLLVM_ENABLE_RPMALLOC=ON -DLLDB_ENABLE_PYTHON=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_ENABLE_PROJECTS="clang;lld;lldb;compiler-rt" -DCMAKE_INSTALL_PREFIX=E:\llvm\install-RelWithDebInfo-64 -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_OBFUSCATION_LINK_INTO_TOOLS=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_USE_CRT_RELEASE=MT ../llvm
msbuild /m -p:Configuration=RelWithDebInfo INSTALL.vcxproj
X86：clang+lld+release
mkdir build-release-64
pushd build-release-64
cmake .. -G "Visual Studio 17 2022" -A X64 -DCMAKE_CXX_FLAGS="/utf-8" -DCMAKE_C_FLAGS="/utf-8" -DLLVM_ENABLE_RPMALLOC=ON -DLLDB_ENABLE_PYTHON=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_ENABLE_PROJECTS="clang;lld;lldb" -DCMAKE_INSTALL_PREFIX=E:\llvm\install-release-64 -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_OBFUSCATION_LINK_INTO_TOOLS=ON -DCMAKE_BUILD_TYPE=release -DLLVM_USE_CRT_RELEASE=MT ../llvm
msbuild /m -p:Configuration=release INSTALL.vcxproj
popd
mkdir build-release-64-clang
pushd build-release-64-clang
cmake .. -G "Visual Studio 17 2022" -T "LLVM-MSVC_v143" -A X64 -DCMAKE_CXX_FLAGS="/utf-8" -DCMAKE_C_FLAGS="/utf-8" -DLLVM_ENABLE_RPMALLOC=ON -DLLDB_ENABLE_PYTHON=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF -DLLVM_ENABLE_PROJECTS="clang;lld;lldb;compiler-rt" -DCMAKE_INSTALL_PREFIX=E:\llvm\install-release-64 -DLLVM_ENABLE_LIBXML2=OFF -DLLVM_ENABLE_ZLIB=OFF -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_OBFUSCATION_LINK_INTO_TOOLS=ON -DCMAKE_BUILD_TYPE=release -DLLVM_USE_CRT_RELEASE=MT ../llvm
msbuild /m -p:Configuration=release INSTALL.vcxproj Add To VS Project Compiler Cmdline
set /GL off
set /O2 on
-mllvm -data-obfus -mllvm -const-obfus -mllvm -string-obfus -mllvm -ind-call -mllvm -vm-fla -mllvm -fla -mllvm -sub -mllvm -sub_loop=1 -mllvm -split -mllvm -split_num=3 -mllvm -bcf -mllvm -bcf_loop=1 -mllvm -bcf_prob=40 -mllvm -vm-fla-level=7 -mllvm -x-fla-enh -mllvm -x-var-rot -mllvm -x-combine
-mllvm -data-obfus -mllvm -const-obfus -mllvm -string-obfus -mllvm -ind-call -mllvm -vm-fla -mllvm -vm-fla-level=0 -mllvm -x-fla-enh -mllvm -x-combine -mllvm -x-linear -mllvm -ida-obfus
[[clang::annotate("x-vm,x-full,x-cfg,custom-cc")]]
void crypt_func1(uint8_t *var,uint8_t*key,size_t var_size,size_t key_size){
for(auto i=0;i<var_size;i++){
var[i]^=key[i%key_size];
}
}
[[clang::annotate("x-cfg,ind-br,alias-access,custom-cc")]]
void crypt_func2(uint8_t *var,uint8_t*key,size_t var_size,size_t key_size){
for(auto i=0;i<var_size;i++){
var[i]^=key[i%key_size];
}
}
[[clang::annotate("x-cfg,x-vm,ind-br,alias-access,custom-cc")]]
void crypt_func3(uint8_t *var,uint8_t*key,size_t var_size,size_t key_size){
for(auto i=0;i<var_size;i++){
var[i]^=key[i%key_size];
}
}[[clang::annotate("combine_func[tag1]")]]
int a1(int a, int b)
{
printf("%d , %d\r\n", a, b);
printf("%x\r\n", a ^ b);
return a + b;
}
[[clang::annotate("combine_func[tag1]")]]
int a2(int a, int b)
{
std::cout << "hello1" << std::endl;
for (auto i = std::min(a, b);i < std::max(a, b);i++)
{
printf("%x,", i);
}
printf("\n");
return a * b+ a1(a, b);
}
[[clang::annotate("combine_func[tag2]")]]
int a3(int a,int b)
{
printf("%d , %d\r\n", a+1, b+2);
printf("%x\r\n", a ^ b);
return a + b+a^b+ a2(a, b);
}
- https://github.com/HyunCafe/contribute-practice
- https://docs.github.com/en/get-started/quickstart/contributing-to-projects
If you don't know how to learn LLVM, you can check out this repository of mine.
Yes.
Yes.
LLVM- Some anonymous people