Cyber Threat Force (CTF)

This was a short CTF (48h), a format that I like since it doesn’t eat up too much of my time. I enjoyed it with my friends: Lukho, R0ck3t and Volker. We registered a team on CTFTime: Root Root.

We ranked 4th out of 197 teams, scoring 6935 points. And I personnaly ranked 6th, scoring 3775 points and completing 19 challenges!

Here are the challenges that I completed or spent time on, with links to my writeups:

• Pwn
  • PrivEsc
  • Bof 1
  • Bof 1 GetShell
  • Bof 1 PrivEsc
  • Bof 2
  • Bof 2 PrivEsc
  • Bof 3
• Reverse
  • Take your time
  • Flag checker
  • Verify this (almost solved)
  • Smasher (flagged by R0ck3t)
  • The document is strange
  • Viking crypt
  • Trojan tools
• Crypto
  • Strange administration service
  • Strange service
  • (Un)Efficient encryption
• Forensic
  • Welcome to the matrix
  • Usb key cemetery (flagged by Volker)
  • Like a duck in water (flagged by Lukho)
• Steganography
  • Strange file
• Discord
  • Discord as a C2
• Misc
  • Return to the school
  • Azkaban C2

I think I improved quite a bit compared to my previous CTF, but I’m still not good enough at binary exploitation and reverse engineering ; I should have been a lot quicker for many challenges. That would have meant more time to discover the lab, which I didn’t really have time for. Guess I’ll go back to root-me for now!

Links⌗

• Official website
• CTFTime event
• My repo with the sources
• Other writeups that I found:
  • AetherBlack
  • MikeCAT
  • Electro
  • Amendil
  • W0rty
  • UVision
  • Cieran
  • Avilia
  • LightDiscord

Screenshots⌗

The teams scoreboard:

The players scoreboard:

My CTFd profile: