VU Cyberthon 2023 Writeups

CTFtime event link: https://ctftime.org/event/1881

Writeups

• Web Exploitation:
  • Simple Web
  • Docker Web (Unsolved)
• OSINT:
  • Authors mistake
  • Find location
• Network Security:
  • Blue Baby Shark
• Steganography:
  • Music assignment
• Digital Forensics:
  • SHA1 Checksum
  • Viewing Phone Disk Image

Background

Participants will get an access to the cyber security tournament platform and they will have 12 hours to solve CTF challenges.

More info: https://www.cyberthon.lt/

Registration: https://2023.cyberthon.lt/register

• Start: 25 Feb. 2023, 15:00 HKT
• End: 26 Feb. 2023, 03:00 HKT

Categories:

• Cryptography
• Steganography
• OSINT
• Digital Forensics
• Reverse Engineering
• Network Security
• Web Exploitation

Overview

• Solved: 10 (Gave up after 5 hours of playing)
• Overall Difficulty To Me: ★★★★☆☆☆☆☆☆

What I’ve learned in this CTF

• Web Exploitation:
  1. “Brainfuck” Esoteric Programming Language Simple Web
  2. Docker Web (Unsolved)
• OSINT:
  1. Viewing Pinterest Comments Authors mistake
  2. Viewing Image Metadata Find location
• Network Security:
  1. Analyzing How A Bad Actor Infiltrate A System Via Inspecting Packets In WireShark Blue Baby Shark
• Steganography:
  1. Decoding Morse Code In An Audio File Music assignment
• Digital Forensics:
  1. SHA1 Checksum
  2. Viewing Phone Disk Image