1) Exploit-based worm 
`The Zotob worm and several variations of it, known as Rbot.cbq, SDBot.bzh and Zotob.d, infected computers at companies such as ABC, CNN, The Associated Press, The New York Times, and Caterpillar Inc.` — Business Week, August 16, 2005. `Zotob``` is a computer worm which exploits security vulnerabilities in Microsoft operating systems like ...