My solutions to Xmas CTF challenge 2021 (https://xmas.owasp.si/)
| Day | Challenge | Category |
|---|---|---|
| 1 | First challenge | OSINT |
| 2 | Are you still alive? | forensics (text) |
| 3 | Naughty list | web (node.js) |
| 4 | Shiny Bubbles | password cracking |
| 5 | Super Easy Keygen | reverse engineering (python) |
| 6 | Weird Traffic | forensics (network) |
| 7 | Letter to Santa | esoteric languages |
| 8 | PYO | reverse engineering (python) |
| 9 | True secret | forensics (memory + disk) |
| 10 | This is fun | reverse engineering (.NET) |
| 11 | Santa's lost password | cryptography |
| 12 | Santa's radio transmission | forensics (SSTV) |
| 13 | Santa's puzzle | web (PHP) |
| 14 | QR Snake | programming |
| 15 | Santa's old program | reverse engineering (c++) |
| 16 | Shrinking Santa's nice list | forensics (disk) |
| 17 | Santa pwned | binary exploitation (aka pwn) |
| 18 | The Secret Recipe | programming |
| 19 | Santa's library | reverse engineering (.NET) |
| 20 | Santa's encrypted message | cryptography (RSA) |
| 21 | Santa's website issue | web (.NET) + cryptography (XOR) |
| 22 | Another encrypted message | steganography |
| 23 | Nik's message | forensics (gzip) |
| 24 | Saved the best for last | web (Java) |