Santy 【Santy computer worm】
Santy is a name of a computer virus falls in to computer worm category. It was release on 20 December 2004. Within 24 hours of its release, it attacked large number of websites. Santy exploit vulnerability in phpBB software and used Google to spread across the internet.
Santy was created using Perl and when infected, it causes writable files on the infected server to display the message "This site is defaced!!! This site is defaced!!! NeverEverNoSanity WebWorm generation X".