You asked for it and it's here! You can find all the write-ups + back-ends related to the challenges.
We recommend to install and use docker so you can host and try out some of the challenges.
Enjoy and see you next year!
| Round | Type | Challenge name | Difficulty | Solves |
|---|---|---|---|---|
| Online Qualifiers | Crypto | Exorbitant encryption | Easy | 101 |
| Online Qualifiers | Crypto | Grandpa Huberts Vault | Medium | 1 |
| Online Qualifiers | Crypto | Lost key | Hard | 30 |
| Online Qualifiers | DNS | Smallbank treasure hunt | Medium | 8 |
| Online Qualifiers | DNS | Leaky DNS server | Hard | 4 |
| Online Qualifiers | Exploitation | Too easy to be true | Easy | 197 |
| Online Qualifiers | Exploitation | flaginator30000 | Medium | 60 |
| Online Qualifiers | Exploitation | Note server | Hard | 13 |
| Online Qualifiers | Forensics | ChallengeCeption - 1 | Easy | 200 |
| Online Qualifiers | Forensics | TopNotchSecuretty | Easy | 140 |
| Online Qualifiers | Forensics | Track the strike | Easy | 115 |
| Online Qualifiers | Forensics | Secret Message | Easy | 180 |
| Online Qualifiers | Forensics | ChallengeCeption - 2 | Medium | 83 |
| Online Qualifiers | Forensics | Power up your skills | Medium | 47 |
| Online Qualifiers | Forensics | Lazy Domain Admins | Hard | 19 |
| Online Qualifiers | Forensics | ChallengeCeption - 3 | Hard | 81 |
| Online Qualifiers | Forensics | ChallengeCeption - 4 | Hard | 83 |
| Online Qualifiers | Forensics | RouteretouR | Extreme | 0 |
| Online Qualifiers | Misc | Signals | Medium | 70 |
| Online Qualifiers | Mobile | SquareGuard Part 1 | Medium | 15 |
| Online Qualifiers | Mobile | SquareGuard Part 2 | Hard | 13 |
| Online Qualifiers | Programming | Oh!See!Are? | Easy | 115 |
| Online Qualifiers | Programming | Tell me what you see | Easy | 152 |
| Online Qualifiers | Programming | Recipes food truck | Medium | 39 |
| Online Qualifiers | Reversing | WhatThePassword | Medium | 101 |
| Online Qualifiers | Steganography | The Amulet of Deletion | Medium | 56 |
| Online Qualifiers | Steganography | Running In The Metaverse | Extreme | 2 |
| Online Qualifiers | Web | Beep boop | Easy | 202 |
| Online Qualifiers | Web | Don't spy me | Medium | 21 |
| Online Qualifiers | Web | 90s chat | Hard | 11 |
| Online Qualifiers | Web | Bilingual | Extreme | 4 |
| Finals | Crypto | A Mystery File | Medium | 3 |
| Finals | Crypto | Locked out | Hard | 9 |
| Finals | Crypto | Pseudo PNG | Hard | 6 |
| Finals | Crypto | Grandpa Huberts Second Vault | Hard | 2 |
| Finals | Crypto | Grandpa Huberts third vault | Hard | 12 |
| Finals | DNS | Hidden in plain sight | Medium | 9 |
| Finals | Exploitation | hutchYyOS-0.1alpha | Hard | 4 |
| Finals | Forensics | Jeroen's Stew | Medium | 26 |
| Finals | Forensics | Corrupted GIF | Medium | 31 |
| Finals | Forensics | Home setup | Medium | 10 |
| Finals | Forensics | Corrupted GIF returns | Hard | 13 |
| Finals | Misc | Blink | Medium | 10 |
| Finals | Programming | Hungry Hungry Panda | Medium | 27 |
| Finals | Reversing | 2FA | Medium | 9 |
| Finals | Reversing | Leo's smart collar | Hard | 1 |
| Finals | Web | Black Box | Easy | 20 |
| Finals | Web | Horizon 2: the sequel | Medium | 8 |
| Finals | Web | Back to the source | Medium | 37 |
| Finals | Web | The Logical One | Hard | 1 |