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Day 3 Advent of Cyber 2024 - TryHackMe Walkthrough

 Welcome to Day 3 of the Advent of Cyber 2024 challenge by TryHackMe! Today’s challenge is focused on detecting and analyzing web shells and understanding their role in exploiting vulnerable systems. Let's walk through the steps to answer the questions for “Even if I wanted to go, their vulnerabilities wouldn't allow it.”


Step-by-Step Solution

BLUE Team: Where was the web shell uploaded to?

  • Analysis: By examining the web server logs and monitoring file upload paths, the directory and file name of the web shell were identified.
  • Answer: /media/images/rooms/shell.php

BLUE Team: What IP address accessed the web shell?

  • Analysis: Reviewing the server access logs revealed the IP address that interacted with the uploaded web shell.
  • Answer: 10.11.83.34

RED Team: What is the contents of the flag.txt?

To access the flag, we need to simulate an attacker's steps to exploit the vulnerability in the Frosty Pines system.

Answer: THM{Gl1tch_Was_H3r3}

If you liked today's task, you can learn how to harness the power of advance ELK queries.

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