VMProtect 去虚拟化工具 titan
发现一个新的脱VMP壳的工具，利用triton ast匹配和符号执行来工作，记录一下https://github.com/archercreat/titan # titan - VMProtect devirtualizer
I'm releasing my VMProtect devirtualizer for others to research, learn, and improve. This project started in 2018 as a hobby project and was rewritten at least 4 times. During my research, I've met with awesome
people, made friends, and learned a lot.
## How does it work?
The tool uses (https://github.com/JonathanSalwan/Triton) for emulation, symbolic execution, and lifting. The easiest way to match VM handlers is to match them on the Triton AST level. The tool symbolizes vip and vsp registers and propagates memory loads and stores. Almost every handler ends with the store (to the stack, vm register or memory). We take Triton AST of the value that is being stored and match against known patterns:
```c
// Match + .
//
static bool match_add(const triton::ast::SharedAbstractNode& ast)
{
if (ast->getType() == triton::ast::EXTRACT_NODE)
{
return match_add(ast->getChildren()->getChildren());
}
return ast->getType() == triton::ast::BVADD_NODE
&& is_variable(ast->getChildren(), variable::vsp_fetch);
}
```
No matter how obfuscated handlers are, it is possible to match them with a single x86 instruction! Once the handler is identified, it is lifted into a basic block. Once the basic block is terminated, the partial control-flow graph is computed and the RIP register is sliced, giving the address of the next basic block. The process repeats until no new basic blocks are found.
Every basic block is lifted into separate LLVM function. The process of building control-flow graph comes down chaining calls to basic block functions in the right order.
The tool has few custom LLVM passes like `no-alias` and `memory coalescing` passes. The only pass that is left to implement is `flag synthesis` pass which will give the cleanest LLVM bitcode.
## Usage
The tool requires 3 arguments:
- Path to vmprotect intrinsics file
- Path to virtualized binary
- Virtual address of vm entry point
```
./build/titan
titan: for the -i option: must be specified at least once!
titan: for the -b option: must be specified at least once!
titan: for the -e option: must be specified at least once!
./build/titan -i intrinsics/vmprotect64.ll -b samples/loop_hash.0x140103FF4.exe -e 0x140103FF4
```
## Acknowledgements
_Matteo Favaro_ and _Vlad Malagar_ for answering my sometimes dumb questions, helping to find bugs in llvm bitcode, giving motivation and new ideas. esxi内的虚拟机如何去虚拟化 怎么用啊出一下教程 试试怎么用. 能把安装过的虚拟机全部清除吗？我有个硬盘被那所谓的虚拟机锁了，导致无法写入擦除，只能读取。 好东西 收藏了 最新的3.8.4能搞么 怎么用，可以出下教程吗？ 请问怎么使用啊 如何使用啊，好好的学习一下，这么样不会用