If your computer is on a network such as office or school, it is possible to remotely import
the password hashes of other computers on the network without the need to gain physical
access to them.
This method is called sniffing and L0phtCrack 6 and above supports this
option.
To sniff password hashes from other computers, just click on the “Import From Sniffer”
button on the main window. If more than one network interface is detected, the “Select
Network Interface” dialog box allows you to choose the interface to sniff on. After
choosing your interface, the “SMB Packet Capture Output” dialog box appears where you
need to click on “Start Sniffing”.
If the hashes are captured, they are immediately displayed in the dialog box after which
you can hit “Stop Sniffing” and click on “Import” button to load the password hashes for
cracking.