A worm affecting Microsoft Windows was one of the fastest spreading worms in history affecting a new computer every millisecond. It appears that it might have been commissioned by e-mail spammers to send junk e-mail through infected computers. The actual author of the worm remains unknown.
The worm was transmitted via e-mail with a subject line like “Mail Delivery System Error.” The mail contains an attachment that resends the worm to e-mail addresses found in the user’s address book and also copies itself to the “shared folder” of peer-to-peer sharing applications (like Kazaa, at the time) in order to spread through file exchanges. Versions of MyDoom
have continued to resurface as recently as July 2009, targeting Web sites belonging to the White House, Department of Homeland Security, U.S. Secret Service, National Security Agency, Federal Trade Commission, Department of Defense and the State Department, as well as sites in South Korea including the Ministry of Defense.
Photo Credit: Michael_Chavarria