Welcome to the realm of the elves, where you can learn how to solve CTF-style ELF crackmes with Angr binary analysis toolkit.
█████╗ ███╗ ██╗ ██████╗ ██████╗ ███████╗██╗ ███████╗
██╔══██╗████╗ ██║██╔════╝ ██╔══██╗ ██╔════╝██║ ██╔════╝
███████║██╔██╗ ██║██║ ███╗██████╔╝ █████╗ ██║ █████╗
██╔══██║██║╚██╗██║██║ ██║██╔══██╗ ██╔══╝ ██║ ██╔══╝
██║ ██║██║ ╚████║╚██████╔╝██║ ██║ ███████╗███████╗██║
╚═╝ ╚═╝╚═╝ ╚═══╝ ╚═════╝ ╚═╝ ╚═╝ ╚══════╝╚══════╝╚═╝
According to the official documentation, Angr is a
user-friendly binary analysis suite, allowing a user to simply start up iPython and easily perform intensive binary analyses with a couple of commands.
Its capabilities are very exciting: symbolic execution, automatic ROP chain building, automatic exploit generation. The number and variety of examples, and the amount of documentation is impressive. Installation is straight-forward on both Windows and Linux, so we can quickly get started with real projects. A lot of work has been put into this framework. Kudos to the phe people behind, the security researchers from Computer Security Lab at UC Santa Barbara with a long tradition of winning CTFs.
crackme.c- CTF challenge that expects a 10 characters flag to be provided from standard inputangr_solver.py- Solver script using Angr