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  • crowbar - Brute forcing tool that can be used during penetration tests


Crowbar (formally known as Levye) is a brute forcing tool that can be used during penetration tests. It was developed to brute force some protocols in a different manner according to other popular brute forcing tools. As an example, while most brute forcing tools use username and password for SSH brute force, Crowbar uses SSH key(s). This allows for any private keys that have been obtained during penetration tests, to be used to attack other SSH servers.

Currently Crowbar supports:

  • OpenVPN (-b openvpn)
  • Remote Desktop Protocol (RDP) with NLA support (-b rdp)
  • SSH private key authentication (-b sshkey)
  • VNC key authentication (-b vpn)


usage: Usage: use --help for further information 
Crowbar is a brute force tool which supports OpenVPN, Remote Desktop Protocol, SSH Private Keys and VNC Keys.
positional arguments:
-h, --help show this help message and exit
-b {openvpn,rdp,sshkey,vnckey}, --brute {openvpn,rdp,sshkey,vnckey}
Target service
-s SERVER, --server SERVER
Static target
Multiple targets stored in a file
Static name to login with
Multiple names to login with, stored in a file
-n THREAD, --number THREAD
Number of threads to be active at once
-l FILE, --log FILE Log file (only write attempts)
-o FILE, --output FILE
Output file (write everything else)
-c PASSWD, --passwd PASSWD
Static password to login with
-C FILE, --passwdfile FILE
Multiple passwords to login with, stored in a file
-t TIMEOUT, --timeout TIMEOUT
[SSH] How long to wait for each thread (seconds)
-p PORT, --port PORT Alter the port if the service is not using the default value
-k KEY_FILE, --keyfile KEY_FILE
[SSH/VNC] (Private) Key file or folder containing multiple files
-m CONFIG, --config CONFIG
[OpenVPN] Configuration file
-d, --discover Port scan before attacking open ports
-v, --verbose Enable verbose output (-vv for more)
-D, --debug Enable debug mode
-q, --quiet Only display successful logins

Install crowbar
sudo apt install crowbar
Remove crowbar
sudo apt remove crowbar

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