Hacked PCs falsify billions of ad clicks

Online investigators have exposed a network of hijacked computers that defrauded advertisers by generating billions of fake ad views. The so-called botnet scheme, which hijacked 120,000 residential PCs in the US and cost advertisers millions of dollars a month, highlights the increasing complexity and opacity of online advertising.

Spider.io, a London-based start-up that tracks web browsing activity, estimates traffic from the “Chameleon” botnet accounted for almost two-thirds of the total visits to certain websites. The inflated number of page views increased advertising revenues for the websites’ owners.

In a report published on Tuesday, Spider.io said the hijacked PCs generated up to 9bn ad views or “impressions” every month across a network of more than 200 sites. Sophisticated software even mimicked cursor movements and mouse clicks, giving the impression that potential consumers were visiting the sites. Read more >>