CrewCTF 2023 Writeup

CTFTime event link: https://ctftime.org/event/2032

Writeups

• Forensics:
  1. Attaaaaack 1 - 13
  2. Encrypt10n
  3. DUMPster (Unsolved)
• Web:
  1. sequence_gallery
• Misc:
  1. findme

Background

• Starts: 8 July 2023, 05:00 UTC
• Ends: 9 July 2023, 17:00 UTC

CrewCTF is an annual cybersecurity Capture The Flag competition hosted by TheHackersCrew. The second edition, CrewCTF 2023, will start at 5:00 UTC on July 8th and run for 36 hours, ending at 17:00 UTC on July 9th.

With intermediate to expert level challenges, our contests are great opportunities for students and professionals to pick up, practice, and master skills in cybersecurity. Challenge containerization provides safe, hands-on environments for all contestants. Our CTFs are free and open to anyone with an internet connection.

Categories:

• Pwn
• Misc
• Crypto
• Rev
• Forensics
• Web
• Web3

Overview

• Solves: 19/50
• Score: 5312
• Rank: 26/382
• Overall Difficulty To Me: ★★★★★★★☆☆☆

What I’ve learned in this CTF

• Forensics:
  1. Memory Forensic With Volatility & Static Malware Analysis (Attaaaaack 1 - 13)
  2. Memory Forensic With Volatility & Decrypting TrueCrypt Encrypted File (Encrypt10n)
  3. DUMPster (Unsolved)
• Web:
  1. Remote Code Execution Via Argument Injection With dc Command (sequence_gallery)
• Misc:
  1. Finding Location Via OSINT (findme)