Virii and PPC

[Spearmaster]

A virus alert purporting to be a security bulletin from Microsoft, could be the reason why your PPC hits are inflated. Not that we didn't already know, but here may lie the answer to how it was done.

[cnn.com...]

The key quote: Alan Paller, research director at the SANS Institute, a nonprofit security and antivirus research group in Bethesda, Md., said the worm appears not to damage computers, nor allow the theft of data. The goal of the invaders, he said, appears to be to use target computers to click ad banners and other sites as part of a money-making scheme.