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Challenges

23 challenges

All 🌐 Web 💥 Pwn 🔐 Crypto 🔍 Forensics ⚙️ Reversing 🎯 Misc 📱 Mobile
Reversing
100 XP

LockBit

★★☆☆☆ Easy

Inspired by obfuscation techniques used in the LockBit ransomware family, this challenge implements a multi-layer...

Reverse Engineering Linux Binary Analysis
👥 5 ❤️ 0
by Administrator
Reversing
100 XP

Cyclix

★★☆☆☆ Easy

Inspired by real-world malware obfuscation techniques, this challenge implements a cyclic encryption routine to hide...

Reverse Engineering Linux Binary Analysis
👥 4 ❤️ 0
by Administrator
Reversing
100 XP

AMOS

★★☆☆☆ Easy

Inspired by real-world obfuscation techniques used in the AMOS Stealer malware, this challenge hides a flag using a...

Reverse Engineering Linux Binary Analysis
👥 4 ❤️ 1
by Administrator
Pwn
100 XP

Legacy Auth

★★☆☆☆ Easy

An old authentication daemon was discovered running on an internal server. The sysadmin claims it's been there "since...

Pwn Linux Binary Exploitation
👥 7 ❤️ 0
by Administrator
Crypto
150 XP

Matryoshka Payload

★★★☆☆ Moderate

Like Russian nesting dolls, each layer reveals another. Ciphertext:

👥 3 ❤️ 0
by Administrator
Crypto
150 XP

Loader Chain

★★★☆☆ Moderate

Inspired by real IoT botnet droppers (Mirai, Gafgyt). Ciphertext:

👥 3 ❤️ 0
by Administrator
Crypto
75 XP

Escape Mania

★★☆☆☆ Easy

Some WAFs can be bypassed by encoding payloads multiple times. Ciphertext:

👥 6 ❤️ 0
by Administrator
Crypto
100 XP

High Base

★★★☆☆ Moderate

Base64 is mainstream. Base85 offers higher density encoding. Ciphertext:

👥 3 ❤️ 0
by Administrator
Crypto
100 XP

Inflate the Truth

★★★☆☆ Moderate

Zlib is gzips cousin - commonly used in HTTP compression and many file formats. Ciphertext:

👥 4 ❤️ 0
by Administrator