Create or locate a simple executable for testing. For demonstration, you can easily create a test program, such as a small messagebox.exe . Alternatively, many tutorials use tools like mimikatz.exe as a common test case.
The GUI is intuitive and includes helpful tooltips:
return 0;
Understanding Exe to Shellcode Conversion Converting an executable (EXE) file into shellcode is a core technique in reverse engineering, malware analysis, and penetration testing. Shellcode is a list of machine code instructions that can execute directly in memory without relying on the OS loader to resolve dependencies. convert exe to shellcode
The following tools are the industry standards for transforming compiled binaries into executable shellcode:
When you convert a standard EXE into shellcode, you remove its rigid file structure. This allows the code to run flexibly inside the memory space of another process. Why Convert an EXE to Shellcode?
This is the classic pattern used by many of the most established tools. The conversion process creates a unified payload by taking a pre-written (typically a small PIC written in assembly or C) and appending the raw bytes of the target EXE file. When the combined payload is executed in memory, the loader stub runs first. It must perform all the duties of the OS loader, including: walking the PEB to find loaded DLLs, resolving API functions by their ROR13 hashes to avoid plain-text strings, mapping the PE's sections into memory with correct permissions, and finally jumping to the original entry point to execute the main program. Create or locate a simple executable for testing
donut.exe -i "C:\tools\mimikatz.exe" -a 2 -e 3 -x 2 -p "log sekurlsa::logonpasswords exit" -o "C:\payloads\mimikatz.bin"
Compile: x86_64-w64-mingw32-gcc popup.c -o popup.exe
This will generate a disassembly listing of the executable file. The GUI is intuitive and includes helpful tooltips:
Embedding Shellcode in .text and .data section. | by Irfan Farooq
[ Bootstrap Loader Code ] + [ Original EXE Payload ] + [ Configuration Data ]
The stub acts as a mini-OS loader: it allocates memory, parses the embedded PE headers, maps the sections, resolves the Import Address Table in memory, and jumps to the original entry point (OEP). Usage Example:
Safety, testing, and troubleshooting
// Example concept: Finding functions manually typedef int (WINAPI *MessageBox_t)(HWND, LPCSTR, LPCSTR, UINT); void ShellcodeEntry() // 1. Walk the Process Environment Block (PEB) to find kernel32.dll / user32.dll // 2. Locate GetProcAddress and LoadLibraryA // 3. Resolve the target function dynamically MessageBox_t pMessageBoxA = (MessageBox_t)CustomGetProcAddress(Modules.User32, "MessageBoxA"); // 4. Call the function using stack-allocated strings pMessageBoxA(NULL, "Hello", "Shellcode", 0); Use code with caution. Step 2: Compile to an Object File