As a preliminary step, Ivan would do an enumeration, which reveals details about a target system. Once again the Internet conveniently provides software for the purpose (at http://ntsleuth.0catch.com ; the character before "catch" is a zero). Ivan found several publicly available hacking tools on the Web that automated the enumeration process, avoiding the need to do it by hand, which would take longer and thus run a higher risk. Knowing that the organization mostly deployed Windows-based servers, he downloaded a copy of NBTEnum, a NetBIOS (basic input/output system) enumeration utility. He entered the IP (Internet protocol) address of the ATM5 server, and started running the program. The enumeration tool was able to identify several accounts that existed on the server.