The infra got closed as soon as the CTF was over, so there’s no description :( Overview We are tasked with reverse engineering a kernel module and leaking the flag (placed at /flag.txt). We are ...

Initial Analysis This is an ELF binary coded in C++, the main function contains a loop that, once it exits, prints the flag. { char i; do { if (!set_7th_char_to...

The Sheriff steps into the square, hand twitchin’ near his holster, eyes locked on your repo. He’s seen the warnings—and he don’t take kindly to ‘em. Fire up your IDE, fix what’s broken, and make d...

This VM should keep my program safe… right? Initial Overview VM exe coded in C, takes an arg which is a 32 bit integer which is the password, prints the flag if correct, prints nothing if not. A...

Couldn’t find the official description so here’s the “Synopsis”: Gateway is a Hard reversing challenge. Players will reverse a 64-bit polyglot binary presented as an i386 statically linked ELF. Muc...

No description, no hints, very boring :( Initial Analysis In the provided source we are given 3 main pieces of functionality: creating a recipient in an array (max of 32 bytes), creating a messa...

A new and obscure programming language, MimiLang, has surfaced. It runs on a peculiar interpreter, but something about it feels… off. Dive into its inner workings and figure out what’s really going...

SIGPwny Transit Authority needs your fares, but the system is acting a tad odd. We’ll let you sign your tickets this time! https://fare-evasion.chal.uiuc.tf/ First looks When pressing the “I’m ...

I lost the description :( Background SquirelCTF challenge, called “bin fun”, TL;DR at end (to avoid spoilers). Static Analysis It’s not static but it is stripped, but finding main is not an iss...

Did you know that the mov instruction in x86 is Turing complete :D? The crackme’s background In the past, I’ve seen Christopher Domas’s work. I could tell from the challenge name it was going ...