TryHackMe Vulnversity Walkthrough

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TryHackMe Advent of cyber Day 9 Task 14 walkthrough


While using a question-answer model does make learning easier, TryHackMe allows users to create their own virtual classrooms to teach particular topics enabling them to become teachers. This not only provides other users with rich and varied content, but also helps creators reinforce their understanding of fundamental concepts.

TryHackMe Vulnversity Walkthrough

Learn about active recon, web app attacks and privilege escalation.


This is our first room on TryHackMe and we’re gonna follow along with the OSCP preparation series. Let’s get started with our first machine. TryHackMe Vulnversity Walkthrough



Specifications

• Room: Vulnversity
• Target OS: Linux
• Difficulty: Easy
• Info: Learn about active recon, web app attacks and privilege escalation.
• Services: SSH (22), FTP (21), SMB (139, 445), Squid (3128), HTTP (3333)

Contents

• Getting user
• Getting root

Reconnaissance

Ports Scanning

As always, the first step consists of the reconnaissance phase as port scanning.



Task 2-2: Number of open port

Using the following nmap command, a total of 6 open ports can be detected.


$ nmap 10.10.39.202 -Pn

OR

$ nmap -Pn -p-10000 -A -v <MACHINE IP>




    -Pn: Just scan for open ports
    -p-10000: Scan first 10000 ports
    -A: Enable OS detection, execute in-build script
    -v: Verbose mode (Displaying all the scanning processes and results)







Answer :- 6






Task 2-3: Squid proxy version


By using the nmap scanner, I am able to identify the version.


$ nmap 10.10.39.202 -Pn -sV


    -Pn: Just scan for open ports
    -sV Just scan version
   






Answer :- 3.5.12



Task 2-4: The meaning of -p-400 flag



By referring to the task 2-2, the flag means scanning the first 400 ports.


Answer :- 400




Task 2-5: What will not be resolved by -n flag

Referring to the nmap documentation, the DNS will not be resolved by using -n flag.


Answer: DNS




Task 2-6: OS detection


By using the nmap scanner, I am able to identify the OS of the machine.


$ nmap 10.10.39.202 -Pn -sV -O


OR


$ nmap 10.10.39.202 -sC -sV -Pn -O

   -O for OS Detection
   -sC for Default NSE Script








Answer :- Ubuntu



Task 2-7: Port that run by the web server.


Web servers are not always run on the port 80, that is why we miss it out sometime. The webserver is located on port 3333.



$ nmap 10.10.39.202 -sC -sV -Pn







Answer: 3333

[Task 3] Locating directories using GoBuster

Using a fast directory discovery tool called GoBuster you will locate a directory that you can use to upload a shell to.


The tasks in the challenge room want you to use Gobuster to enumerate the target website directories, which is fine, but just be aware that there are other tools that do similar types of directory scanning. See below for a brief breakdown of the more popular ones but understand they they all do the same thing - automate the time consuming task of finding various directories on a website.



$ gobuster dir -e -u http://10.10.164.121:3333 -w /usr/share/wordlists/dirb/common.txt



dir: uses directory/file brute forcing mode

-e: expanded mode, print full URLs

-u: the target URL or domain

-w: path to word list




Keep in mind that the size of your word list matters! A smaller word list will finish faster but may miss potentially interesting directories while a larger one may find more but could potentially take way longer to finish. Kali comes preinstalled with a bunch and you should play around with them to find the best ones for the situation you are in.






Answer :- /internal/




Remaining Question :- SooN




Video Tutorial :-


    

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