What is Mimikatz?
Mimikatz is a tool created by the French developer, Benjamin Delpy used to gather credentials and can carry out a range of operations connected with penetration testing. Its creation stems from a noted vulnerability of the Windows system function called WDigest. WDigest is designed to allow larger Windows-based network users to establish credentials in multiple applications on a LAN or WAN. This feature stores authentication credentials in memory and allows for their automatic reuse so users only have to enter their login details once.