Scanning for blank admin passwords on a windows box

[Jason <cisspstudy () yahoo com>]

I am looking for a fast multithreaded tool that can scan a range of IP 
addresses and look for blank administrator (or other user accounts) 
passwords on a windows NT/2000 server.

If it can also try the username as password, server name as password that 
would also be nice.

Doing blank password scanning using the following command line syntax is 
driving me crazy!

FOR /L %i IN (1,1,254) DO net use \\XX.XX.XX.%i\IPC$ "" /u:Administrator

Any help appreciated.

Jason

----------------------------------------------------------------------------
This list is provided by the SecurityFocus Security Intelligence Alert (SIA)
Service. For more information on SecurityFocus' SIA service which
automatically alerts you to the latest security vulnerabilities please see:
https://alerts.securityfocus.com/