This is an expect script that will allow you to specify a host file, user file, and a dictionary. Extremely useful for auditing large networks where you can't manually log into every machine or don't feel like re-running something on every host.
Tool:
#!/usr/bin/expect -f
#
# Written by James Shanahan (jshanahan@comcastpc.com)
# and Erin Palmer(epalmer@comcastpc.com)
# ssh brute forcer
# This will allow you to specify hosts, password lists, and a user
# I do not take any responsibility for what you do with this tool
# Hopefully it will make your life easier rather then making other
# peoples lives more difficult!
set timeout 5
set dictionary [lindex $argv 0]
set file [lindex $argv 1]
set user [lindex $argv 2]
