An updated variant of a malicious bot program is <A HREF="http://news.zdnet.com/2100-1009_22-6139493.html?tag=nl.e589">spreading via a flaw in Symantec's antivirus software</A> as well as through several holes in Microsoft code. The program, called "Spybot.ACYR" by Symantec and "Sdbot.worm!811a7027" by McAfee, appears to be targeting educational institutions, according to a blog item posted by Symantec Tuesday.