50d9cba542
Fixes #421 Ensures sogen handles two edge cases correctly: - VirtualAlloc with size 0 and invalid flags now returns STATUS_INVALID_PARAMETER instead of terminating emulation with an exception. - VirtualFree with an invalid free_type now fails cleanly, as per Windows behavior. Using test code from #421 before change: Executing syscall: NtAllocateVirtualMemory (0x18) at 0x180162bb2 via 0x103858074 (KernelBase.dll) Syscall threw an exception: 18 (0x180162bb2) - Unsupported allocation type! Emulation terminated without status! After: Executing function: kernel32.dll - VirtualAlloc (0x103703c90) via (0x14000119a) Valloc.exe Executing syscall: NtAllocateVirtualMemory (0x18) at 0x180162bb2 via 0x103858074 (KernelBase.dll) Executing function: kernel32.dll - GetLastError (0x1036e8640) via (0x1400011a5) Valloc.exe Terminating normally: Emulation terminated with status: 0
Sogen is a high-performance Windows user space emulator that operates at syscall level, providing full control over process execution through comprehensive hooking capabilities.
Perfect for security research, malware analysis, and DRM research where fine-grained control over process execution is required.
Built in C++ and powered by the Unicorn Engine (or the icicle-emu 🆕).
Try it out: sogen.dev
Key Features
- 🔄 Syscall-Level Emulation
- Instead of reimplementing Windows APIs, the emulator operates at the syscall level, allowing it to leverage existing system DLLs
- 📝 Advanced Memory Management
- Supports Windows-specific memory types including reserved, committed, built on top of Unicorn's memory management
- 📦 Complete PE Loading
- Handles executable and DLL loading with proper memory mapping, relocations, and TLS
- ⚡ Exception Handling
- Implements Windows structured exception handling (SEH) with proper exception dispatcher and unwinding support
- 🧵 Threading Support
- Provides a scheduled (round-robin) threading model
- 💾 State Management
- Supports both full state serialization and
fast in-memory snapshots(currently broken 😕)
- Supports both full state serialization and
- 💻 Debugging Interface
- Implements GDB serial protocol for integration with common debugging tools (IDA Pro, GDB, LLDB, VS Code, ...)
Note
The project is still in a very early, prototypical state. The code still needs a lot of cleanup and many features and syscalls need to be implemented. However, constant progress is being made :)
Preview
YouTube Overview
Click here for the slides.
Quick Start (Windows + Visual Studio)
Tip
Checkout the Wiki for more details on how to build & run the emulator on Windows, Linux, macOS, ...
1. Checkout the code:
git clone --recurse-submodules https://github.com/momo5502/sogen.git
2. Run the following command in an x64 Development Command Prompt in the cloned directory:
cmake --preset=vs2022
3. Build the solution that was generated at build/vs2022/emulator.sln
4. Create a registry dump by running the grab-registry.bat as administrator and place it in the artifacts folder next to the analyzer.exe
5. Run the program of your choice:
analyzer.exe C:\example.exe