L0phtCrack 1.5 is a tool for turning Microsoft LANMAN and NT password hashes back into the original clear text passwords. The program does this using dictionary cracking and also brute force. L0phtCrack returns not just the LANMAN password but the NT password up to 14 characters in length. L0phtCrack includes the ability to dictionary attack or brute force the network NT server challenge that is used to prevent the OWF (one-way format) from going across the wire in its plain-text format. Sample network sniffed challenges are in files sniff.txt and sniff2.txt. This means you can obtain NT passwords without administrator privileges when you have network access between the client and the server.