Wikipedia
Badbunny
Badbunny, also known as SB/BadBunny-A ( Sophos) and StarOffice/BadBunny ( McAfee), is a multi-platform computer worm written in several scripting languages and distributed as an OpenOffice.org document containing a macro written in StarBasic.
Discovered on May 21, 2007, the worm spreads itself by dropping malicious script files that affect the behavior of popular IRC programs mIRC and X-Chat, causing it to send the worm to other users.