BO2K is a remote administration tool developed by the hacker group called, “Cult of the Dead Cow.” BO2K is a “backdoor” program that consists of a client and server. This tool works on all current windows platforms and can be either rewarding or harmful to you computer system depending on how it is being used. BO2K has been classified as a Trojan Horse program because people commonly use this program to crack into other people’s systems. BO2K is an open source program and is constantly being modified with plug-ins to make this program one of the most powerful back door programs in the industry. BO2K is relatively small file of about 100K and is easy to download which makes this program very dangerous to internet users who are not cautious of what they download.