5800,5801,5900,5901 - Pentesting VNC
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Basic Information
Virtual Network Computing (VNC) is a robust graphical desktop-sharing system that utilizes the Remote Frame Buffer (RFB) protocol to enable remote control and collaboration with another computer. With VNC, users can seamlessly interact with a remote computer by transmitting keyboard and mouse events bidirectionally. This allows for real-time access and facilitates efficient remote assistance or collaboration over a network.
VNC usually uses ports 5800 or 5801 or 5900 or 5901.
Enumeration
Connect to vnc using Kali
Decrypting VNC password
Default password is stored in: ~/.vnc/passwd
If you have the VNC password and it looks encrypted (a few bytes, like if it could be an encrypted password), it is probably ciphered with 3des. You can get the clear text password using https://github.com/jeroennijhof/vncpwd
You can do this because the password used inside 3des to encrypt the plain-text VNC passwords was reversed years ago. For Windows you can also use this tool: https://www.raymond.cc/blog/download/did/232/ I save the tool here also for ease of access:
Shodan
port:5900 RFB
If you are interested in hacking career and hack the unhackable - we are hiring! (fluent polish written and spoken required).
Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)
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