Experts Debate Danger of Phatbot Worm:
"Security discussion lists and reports were abuzz Wednesday with talk of a new worm, named 'Phatbot,' that had spread to as many as hundreds of thousands of systems. But not all security experts agreed that the worm was widespread.

As of late Wednesday afternoon, no major antivirus company had listed the worm as more than a 'low' risk. "

http://www.eweek.com/article2/0,1759,1550393,00.asp?kc=EWNWS031804DTX1K0000599