Table of Contents

47 Challanges

• Forensics
• Reverse Engineering
• Cryptography
• Binary
• Web Exploitation
• Misc
• Boot2Root
• Credits & References

Forensics

8 Challanges

• STRABA
• EFTERFORSKNINGEN
• PING-SWEEP
• FDE-BOOTLOADER
• FUTURISTIC MALWARE
• COVERTCHANNEL1
• COVERTCHANNEL2
• COVERTCHANNEL3

Reverse Engineering

6 Challanges

• OUTXORCING
• WHAT TIME IS IT?
• PASSPROTECTOR
• STERN BROCCOLI
• NOTEPADLAUNCHER
• DDCLE

Cryptography

10 Challanges

• VIGENÈRE'S DICTIONARY
• LONG LIVE, CAESAR!
• AES DECRYPTION
• BINARY-ENCODINGS1
• BINARY-ENCODINGS2
• DLOG
• DLOG 2
• RSA2
• LEARNING WHAT EXISTS
• AUTHENTICATED PRIVILEGE 2, SYMMETRIC PSYDUCKS RETURN!

Binary

5 Challanges

• GOTOWIN
• PWN ME GOOD UWU
• PWN ME GOOD UWU - WIFU EDITION
• ROPLICATOR
• EZWIN

Web Exploitation

8 Challanges

• CROSS SITE JOB
• LEAKY STORE
• COMPLETE STYLING SADNESS
• FIND FRONTDOOR
• DDC LOUNGE
• FILM TIL DIG PT 1
• FILM TIL DIG PT 2
• PHP101

Misc

8 Challanges

• MASAHIRO HARA
• THE PROFESSOR’S LOST NOTE
• SHUTTER TRACE
• HASHER IS BACK
• DDC ADMIN BOT
• ROLL YOUR OWN CRYPTO
• MAX 420
• MAX 69

Boot2Root

2 Challanges

• THE GAUNTLET PT 1
• THE GAUNTLET PT 2

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Credits & References

Huge thanks to the following contributors and sources whose writeups or insights were referenced in this repository:

Contributor	Discord Handle	Source / Reference / Material Used
MartenPK	MartenPK	Private contributions via Discord ECSCPrequalWriteups.tar ␥ dlog1 ␥ dlog2 ␥ covertchannel2 ␥ DDC Admin Bot ␥ Max 420 ␥ Roll your own crypto ␥ gotowin ␥ Pwn Me Good Uwu ␥ Pwn Me Good Uwu Wifu Edition ␥ ROPlicator ␥ DDCLE ␥ Stern Broccoli
zebbern	cc_pz	GitHub – CTF Quals 2025 ␥ Binary-Encodings1 ␥ outXORcing ␥ Complete Styling Sadness ␥ Long live, Caesar! ␥ The Professor's Lost Note ␥ Shutter Trace ␥ Hasher is back ␥ Straba
lilliefox	lilliefox	CTF Archive – Nordics DDC ECSC 2025 ␥ fde-bootloader ␥ Futuristic Malware ␥ The Gauntlet part 1 ␥ The Gauntlet part 2 ␥ Max69
R4	0xlimE	Blog – Film Til Dig Writeup ␥ Film Til Dig part 1 ␥ Film Til Dig part 2
noisedk	noisedk	GitLab Snippet – CTF Writeups ␥ Covert Channel 3
marko213	marko312	GitHub – DDC Quals 2025 Writeups ␥ Binary-Encodings2

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If you have additional writeups, insights, or corrections you'd like added, feel free to reach out or open a PR!

Or Contact me via: discord: cc_pz