Scapy and Pwntools
Generating arbitrary packets and making connections is pretty easy in Python, but what if.... they were even easier. Here we will introduce two programs to make your life somehow, even easier.
Scapy:
Scapy is a Python program that enables the user to send, sniff and dissect and forge network packets. This capability allows construction of tools that can probe, scan or attack networks.
I will describe scapy as horrifyingly capable and ludicrously complex, but it's way easier than a lot of other ways to generate arbitrary packets and send them across the internet, so we'll call it a win. Check out the docs through the Quick Demo to get an idea of what Scapy is capable of.
Experiment with this and look at what you are creating in Wireshark.
Pwntools:
pwntools is a CTF framework and exploit development library. Written in Python, it is designed for rapid prototyping and development, and intended to make exploit writing as simple as possible. Before we get to exploits though, it provides a really great way to interact with tubes... aka networking.
Work through the pwntools tutorials.
- Installing Pwntools
- Tubes
- Basic Tubes
- Interactive Shells
- Processes
- Networking
- Secure Shell
- Serial Ports
If you want more practice using Pwntools, write a python script to solve the first 5 challenges in Over the Wire Bandit. https://overthewire.org/wargames/bandit/