Challenges

Clear
All 96 Web 10 Pwn 7 Crypto 7 Forensics 7 Rev 6 Misc 7 OSINT 6 network 7 Mobile 10 Cloud 10 web3 10 Linux 9
Rev Easy

Simple Serial Key Checker

This program checks if you enter the correct serial key. Reverse engineer the validation logic to find the correct key. The flag is the serial format. Compile: gcc -o crackme crackme.c -O0

150 pts
7 solves 🩸
Rev Easy

String Search

A simple crackme with the password stored as hex-escaped bytes. Extract using strings or a disassembler.

100 pts
4 solves 🩸
Rev Medium

Anti-Debug Bypass

Binary uses ptrace() to detect debuggers. Bypass the anti-debug or patch the binary to always take the non-debug path.

300 pts
4 solves 🩸
Rev Hard

Obfuscated Python

Obfuscated Python with base64 encoding. Trace the decode logic to recover the password and flag.

400 pts
4 solves 🩸
Rev Hard

VM Reversing

A custom virtual machine with 7 opcodes. Reverse the bytecode to find the password, then run the VM to get the flag.

400 pts
4 solves 🩸
Rev Insane

Packed Binary

Binary with XOR-encoded payload using key 'UNPACK'. Deobfuscate to reveal the secret passphrase which IS the flag.

500 pts
4 solves 🩸