c-to-shellcode.py

It's a simple Python script to easily convert C code to shellcode (standalone binary machine code) with one command 👾🐚 Read more: From C to shellcode

Dependencies:

• Python 3.x
• x86_64-w64-mingw32-gcc-win32
• ld

Usage

1. Write something cool to payload.c
2. Execute: python c-to-shellcode.py
3. Look at the bin/ directory:
   • payload.exe - compiled C program (without shellcode conversion), so you can use libc and WinAPI functions directly, e.g. printf(). Great for debugging and fast development.
   • loader.exe - loader with compiled shellcode. It really injects shellcode into memory and executes it just like real malware.
   • payload.bin - raw standalone shellcode binary file.

Caveats

• There's no external functions! No linkage to libc or win32. However, you are still able to include header files and use macros and types only. If you see linker errors during compilation then you are probably using some external functions. You have to implement everything on your own here.
• Global variables are not available.
• Use ALIGN_STACK() macro directly before any WinAPI call! The 16-bytes stack alignment is required for WinAPI functions.
• Use FUNC macro before function header (except start):

FUNC int ExampleFunction() { ... } 

• All strings have to be stack based:

int start(void) {
    // Stack based string
    char string[] = {'t', 'e', 's', 't', '\0'};
}