OnTheFly Type Subtype Creator(s) Date Place of Origin Source Language Platform File Type Aliases Family File Size Infection Size Infection Impact Reported Costs MD5 Hash SHA1 Hash CRC32 Hash OnTheFly is a Visual Basic Script worm. The worm was created with a worm construction kit. This worm stands out because virus and worm construction kits rarely produce working code, but rather broken, intended code. It is probably most famous for its social engineering tactic, using the promise of pictures of the famous tennis star, Anna Kournikova, to entice victims to run the worm.