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arkari's Introduction

Arkari

Yet another llvm based obfuscator based on goron.

当前支持特性:

  • 混淆过程间相关
  • 间接跳转,并加密跳转目标(-mllvm -irobf-indbr)
  • 间接函数调用,并加密目标函数地址(-mllvm -irobf-icall)
  • 间接全局变量引用,并加密变量地址(-mllvm -irobf-indgv)
  • 字符串(c string)加密功能(-mllvm -irobf-cse)
  • 过程相关控制流平坦混淆(-mllvm -irobf-cff)
  • 全部 (-mllvm -irobf-indbr -mllvm -irobf-icall -mllvm -irobf-indgv -mllvm -irobf-cse -mllvm -irobf-cff)

对比于goron的改进:

  • 由于作者明确表示暂时(至少几万年吧)不会跟进llvm版本和不会继续更新. 所以有了这个版本(amimo/goron#29)
  • 更新了llvm版本
  • 编译时输出文件名, 防止憋死强迫症
  • 修复了亿点点已知的bug
- 修复了混淆后SEH爆炸的问题
- 修复了dll导入的全局变量会被混淆导致丢失__impl前缀的问题
- 修复了某些情况下配合llvm2019(2022)插件会导致参数重复添加无法编译的问题
- 修复了x86间接调用炸堆栈的问题
- ...

编译

  • Windows(use Ninja, Ninja YYDS):
install ninja in your PATH
run x64(86) Native Tools Command Prompt for VS 2022(xx)
run:

mkdir build_ninja
cd build_ninja
cmake -DCMAKE_CXX_FLAGS="/utf-8" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;lld;lldb" -G "Ninja" ../llvm
ninja

使用

跟ollvm类似,可通过编译选项开启相应混淆. 如启用间接跳转混淆

$ path_to_the/build/bin/clang -mllvm -irobf -mllvm --irobf-indbr test.c

对于使用autotools的工程

$ CC=path_to_the/build/bin/clang or CXX=path_to_the/build/bin/clang
$ CFLAGS+="-mllvm -irobf -mllvm --irobf-indbr" or CXXFLAGS+="-mllvm -irobf -mllvm --irobf-indbr" (or any other obfuscation-related flags)
$ ./configure
$ make

参考资源

arkari's People

Contributors

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