Saturday, April 25, 2020

Vulnhub VMs and guide/hints

I released some VM's on Vulnhub almost a month ago.

This post has guide/hints for those VM's.

Cloud Antivirus/Cloud AV:
1. Start by port scanning your network and locate the Easy Cloud AV VM’s IP address.
a. Port 22 and 8080 should be open and the MAC address should be: 08:00:27:BA:A5:BA
2. Do an Aggressive nmap scan on the target IP address and find out what services are running.
3. Visit the web server running on the target IP
4. You were not provided an Invite code. Bypass the Invite code page.
a. Input data in the invite form field to cause an error on the web server
b. Read the error messages and craft input to bypass the invite code page
5. Get command line injection on the scanner page
a. Based on scanner output, determine what the input could have been
b. Inject your own commands
c. To make sure command execution works, cat /etc/hostname
i. Output from it will be “cloudav”
6. Gather information about the users
a. View linux files that could contain user information
7. Brute force port 22/SSH
a. Use the gathered usernames to build a list of usernames and passwords
b. Use the list for brute forcing port 22/SSH
8. Examine home directory of users and exploit vulnerable application to get root
a. Examine the left behind source code
b. Determine how to inject commands
c. Inject commands to gain root privileges!

Socnet/social network:
Goal: Get root privilege on the machine (hostname: socnet)
1. Start by port scanning. Locate socnet VM’s IP address.
a. Port 22 and 5000 should be open. Mac address should be: 08:00:27:A6:E2:EC
2. Do an aggressive nmap scan on the target IP and find out which services are running
3. Visit the webpage on the target IP
a. Examine it for any vulnerabilities
4. Use dirb to scan the website for hidden pages
5. Use the input on the hidden page to test code
b. Try Python’s time.sleep module and see if website will take sleep and take longer to
respond. Try 5 second sleep then 10 second sleep to observe different response times.
6. Abuse to the code testing functionality to get a reverse shell
7. Setup a more stable reverse shell with meterpreter
b. Create the reverse shell binary
c. Transfer the binary to target machine using a webserver on the attacker machine and
running wget on the target machine
d. Use metasploit to handle meterpreter reverse shell
8. Utilize the ‘arp’ command in meterpreter to look for other machines on the target network
9. Utilize the ‘ifconfig’ command in meterpreter to get targets network information
10. Using metasploit, setup a route via meterpreter session
11. Utilize auxiliary/scanner/portscan/tcp to scan other machines on the target network
12. Google open ports and find out what they’re used for
13. Utilize meterpreter session to do port forwarding from your local machine to the machine with
port 9200 open
14. Utilize curl and query machine with port 9200 open and find what’s running on it, including any
version numbers
15. Exploit the service running on port 9200
a. Search for an exploit that works against version of service running on 9200
b. Utilize the exploit and gain shell access
c. Examine / directory for interesting files
16. Utilize passwords file collected from machine with port 9200 open, crack the passwords, and
build a username and password list
17. Attack SSH running on the target machine with the username and password list
18. After logging in successfully on the target machine via SSH, gather machine information
a. Get OS info
b. Get kernel info
c. Arch info (64bit or 32bit)
19. Use privesc exploit to get root privs
a. Utilize collected info to search for privesc exploits
b. Compile the privesc exploits and transfer the compiled files to target system using SCP
c. Execute the exploits to finally get root privs

Socnet2/social network 2:
Goal: Get root privilege on the machine
1. Start by port scanning and locating socnet2 VM.
a. Port 22, 80, and 8000 should be open. Mac address should be: 08:00:27:e9:e5:e6
2. Do an aggressive nmap scan and find more information about the services running
3. Visit webservers
4. Visit webserver on port 80 and examine it
a. Sign up
b. Explore the site
c. Look for any issues
5. Get a backdoor on the webserver
a. Utilize file upload functionality to get a backdoor on the webserver
b. Run the backdoor
6. Utilized the backdoor to find more information about whats running on port 8000
a. Examine the file system, processes
b. Be sure to read social network posts as well
7. Abuse the service running on port 8000 to get another shell
a. Examine the source code for the service running on port 8000
b. Write a custom tool/script to gain shell through service running on port 8000
8. Load a meterpreter backdoor on the victim machine and utilize it to examine files in the users
9. Write an exploit for SUID binary
a. Find the SUID binary in the user folder
b. Binary includes a backdoor function
c. Download the binary, use a debugger, and different inputs to trigger a crash and control
the EIP
d. Create a working exploit that launches backdoor function
10. Put the exploit on victim machine and exploit the SUID binary to get root

Moriarty Corp:
Goal: Get all the flags

No guide or hints. Sorry.


  1. hey bro, i been working on the Moriarty Corp VM and im stucking on the Simple Image Warehouse. I've tried BruteForce the login form but failed. seems like i got the wrong path here, Could u give me some hints? thanks for that!

  2. Hi buddy, today I think I finished your ctf (I got the 6th flag and got "BlackListed"), is it the end or should I find a way to pwn the docker host ?

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