Rainfall is a 42 project aimed to be an introduction to computer security. It's composed of several levels under a virtual machine that contains challenges to get the flag for the next level. This is a writeups repo.
Every folder is a level as follow:
levelXX/
flag
source.c
walthrough.md
flag is the flag you have to find on this level and also the password for the next level (su levelYY), source.c contains the disassembled executable and walkthrough.md contains a writeup of the level.