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sondt's Blog · security · ctf · systems

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2025

2025-12-08

Writeups Backdoor CTF 2025

Writeups for Backdoor CTF 2025 — reverse, pwn, and crypto notes (14 challenges).

2024

2024-10-27

ISITDTU CTF 2024 Quals — 15th/315 teams, 21 challenges solved (web, reverse, pwn notes).

2024-01-06

In this post I write up 3 Digital Forensics challenges.

2024-01-01

A personal look at a legacy XVR camera setup and the risks of default access.

2023

2023-12-18

The last CTF i joined in 2023. Happy New Year!!!

2023-11-10

This post is a recap of my team's journey participating in the Cyber SEA Game 2023 in Bangkok, Thailand (November 9-10, 2023).

2023-08-27

Wibu time, this writeup is about the RE challenges I solved in SekaiCTF 2023

2023-07-09

Clear Reverse Engineering giải Cookie Arena mùa 2

2023-05-17

Writeup 7/8 digital forensics challs in UMDCTF 2023.

2023-05-05

Kali Linux VPS for Free

2022

2022-08-09

CorCTF 2022 reverse engineering writeups — flag checkers, custom VMs, and RE tricks.