CTF Writeups by @jiegec
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Advent of CTF 2025

Link: https://cyberstudents.net/advent/2025

Solved Challenges:

  • Day 01 The Mission Begins
  • Day 02 The First Strike
  • Day 03 Syndicate Infrastructure
  • Day 04 The Elf's Wager
  • Day 05 Kramazon
  • Day 06 KDNU-3B
  • Day 07 Failed Exfil
  • Day 08 Log Folly
  • Day 09 Time To Escalate
  • Day 11 Syndiware
  • Day 12 Re-Key-very
  • Day 13 Holiday Routing
  • Day 14 Multifactorial
  • Day 17 Won’t You Guide My Drone Tonight?
  • Day 19 Trust Issues
  • Day 20 Custom Packaging

Pending for disclosure:

  • Day 10 Jingle's Validator
  • Day 16 FrostByte

Not fully solved:

  • Day 15 Image Security
  • Day 18 Sealed for Delivery

Copyright © 2025 Jiajie Chen

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