Crowbar - Brute Forcing Tool for Pentests

Crowbar (crowbar) is brute forcing tool that can be used during penetration tests. It is 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. So SSH keys, that are obtained during penetration tests, can be used to attack other SSH servers.

Currently Crowbar supports
  • OpenVPN
  • SSH private key authentication
  • VNC key authentication
  • Remote Desktop Protocol (RDP) with NLA support

First you shoud install dependencies
 # apt-get install openvpn freerdp-x11 vncviewer
Then get latest version from github
 # git clone 
Attention: Rdp depends on your Kali version. It may be xfreerdp for the latest version.


-h: Shows help menu.
-b: Target service. Crowbar now supports vnckey, openvpn, sshkey, rdp.
-s: Target ip address.
-S: File name which is stores target ip address.
-u: Username.
-U: File name which stores username list.
-n: Thread count.
-l: File name which stores log. Deafault file name is crwobar.log which is located in your current directory
-o: Output file name which stores the successfully attempt.
-c: Password.
-C: File name which stores passwords list.
-t: Timeout value.
-p: Port number
-k: Key file full path.
-m: Openvpn configuration file path
-d: Run nmap in order to discover whether the target port is open or not. So that you can easily brute to target using crowbar.
-v: Verbose mode which is shows all the attempts including fail.
If you want see all usage options, please use crowbar --help

Crowbar - Brute Forcing Tool for Pentests Crowbar - Brute Forcing Tool for Pentests Reviewed by Zion3R on 8:43 PM Rating: 5