Modifying Custom AD Attributes w/Powershell

Recently I needed to create a custom user attribute within our Active Directory environment.  Rather than manually edit each user with the new value, I thought of using Powershell to automate the process.  I began testing the process using set-aduser.  Generally you'd find the associated property and add the value:

set-aduser username -EmailAddress username@domain.com

The custom attribute I created was EmployeeDOB so I ran the same command but the property was not recognized.  After some research and help from the Technet forums, I was introduced to the following options:

set-aduser username -Add @{EmployeeDOB='5-1-1978'}

set-aduser username -Replace @{EmployeeDOB='4-1-1980'}

set-aduser username -Remove @{EmployeeDOB='4-1-1980'}

With this new knowledge, I can now hopefully save some time by not having to manually edit these values within ADUC!!

Brute Force Cracking of SSH

You can use Hydra to attempt a brute force attack of SSH.  You'll need a known user account and comprehensive password file.  Root is generally a known user account, but some system admins choose to disable the account from logging in via SSH.  Once you have the above prerequisites you can run the following command:

hydra -l <user> -P wordlist.txt 192.168.0.5 ssh

Happy Hunting!

Disclaimer - Only test this with systems you own and have permission to test!