pynasm

python to nasm assembly conversion, with cpu control.

• x86 64bits only for now.

This allows to create:

• shellcodes
• PIC relocatable low-level code
• infections (for red-teaming)
• obfuscation

Disclaimer

Don't use this for creating malicious payloads!

Usage

generating a relocatable 64bits code blob

python3 pynasm.py shellcode.py
nasm -f bin shellcode.nasm
ls shellcode

or generating an 64bits exe

python3 pynasm.py program.py exe
nasm -f win64 program.nasm
x86_64-w64-mingw32-ld program.obj
ls a.exe

Emulate with SCEMU for testing

./scemu -f shellcode -vv -6

Demo

https://www.youtube.com/watch?v=o072bXNtxmg

Examples

check the examples folder.

WinapiAcces importing winapi lib

Control blocks

Comparing strings

API Call

Arrays and memory blobs

Documentation

https://github.com/sha0coder/pynasm/blob/main/DOCUMENTAITON.md

TODO:

• modulus with aug assign %=
• len(s) from a parameter
• complex ifs and/or
• elif
• break
• continue
• structures
• alloc 100 with: padding times 100 db 0x00