There are several ways to approach this conversion, ranging from automated tools to manual extraction. 1. Using Donut
A standard Windows EXE file relies on the Portable Executable (PE) format. This format includes headers, section tables, and import address tables (IAT) that tell the Windows Loader how to map the file into memory and resolve dependencies like kernel32.dll .
Donut wraps the EXE in a "loader" stub. When the shellcode executes, the stub decrypts the EXE, maps it into memory, and executes it. convert exe to shellcode
Many exploits fail if the shellcode contains null bytes ( 0x00 ), as they act as string terminators. You may need to encode your shellcode using tools like Shikata Ga Nai .
It adds a small bootstrap at the beginning of the EXE. When you jump to the start of the file, this bootstrap relocates the rest of the PE structure in memory. There are several ways to approach this conversion,
What is the (Windows version, architecture)?
Compile your code with all optimizations off and no external dependencies. Use a tool like objcopy or a Hex Editor to copy the bytes from the executable's code section. This format includes headers, section tables, and import
Shellcode is often injected into small memory buffers. Large EXEs may not fit.
It is very lightweight and preserves the original structure of the EXE, making it useful for researchers analyzing malware behavior. 3. Manual Extraction via Hex Editor
Donut is currently the industry standard for this task. It is a position-independent code generator that creates shellcode payloads from PE files, .NET assemblies, and even VBScript.