TryHackMe | Linux Server Forensics Walkthrough

 

Learn about digital forensics artefacts found on Linux servers by analysing a compromised server

Link:- https://tryhackme.com/room/linuxserverforensics


Deploy the first VM

Login using ssh and navigate to /var/log/apache2



How many different tools made requests to the server?

Run the below command



Answer is 2


Name a path requested by Nmap.

Run below command



Answer is /nmaplowercheck1618912425


What page allows users to upload files?

Navigate to the website



Answer is contact.php


What IP uploaded files to the server?

Run below command to find



Answer is 192.168.56.24


Who left an exposed security notice on the server?

Run below command to find



Go to the location mentioned above and open the security.md file



Answer is Fred

What command and option did the attacker use to establish a backdoor?

Run below command to find backdoor



Answer is sh -i

What is the password of the second root account?

Search passwd



Google search xxx from root2 :xxx to find password


Deploy the second VM

Login and navigate to logs



Name one of the non-standard HTTP Requests.

Run below command


Answer is gxwr


At what time was the Nmap scan performed? (format: HH:MM:SS)

Non standard method gxwr -nmap

Answer is 13:30:15


What username and hostname combination can be found in one of the authorized_keys files? (format: username@hostname)


Answer is kali@kali


What is the first command present in root’s bash_history file?


nano /etc/passwd


Deploy The Final VM

Login



Run below command



Figure out what’s going on and find the flag.

Run systemctl status IpManager.service



Open the file /etc/network /ZGtsam5hZG1ua2Fu.sh

This will show the flag



That’s it! See you in the next room :)


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