elf-to-shellcode 1.0

Python package to create shellcdoes from elfs

Elf to shellcode

Convert standard elf files to standalone shellcodes

Who does this work ?

The python library parses the elf and create a simple relocatable file format Then the mini loader is inserted as the entry point of the elf the mini loader will load the relocatable format and execute it. There are no special requirements, the library contain the compiled mini loaders

Supported architectures

• mips

Creating a shellcode

Some compilation flags are required for this to work properly.

Examples:

Makefile

Main.c

How to make a shellcode from an elf:

from elf_to_shellcode.relocate import make_shellcode

shellcode = make_shellcode(
    binary_path="/tmp/binary.out",
    arch="mips",
    endian="big"
)

with open("myshellcode.out", 'wb') as fp:
    fp.write(shellcode)

Testing your shellcode

You can use the provided shellcode Loader to test you shellcodes

qemu-mips ./shellcode_loader ./myshellcode.out

Output example

Shellcode size = 66620
Allocating shellcode buffer, size = 69632
Mapping new memory, size = 69632
Jumping to shellcode, address = 0x7f7ee000
Hello from shellcode !