In September a national retailer based in Ohio discovered that Scob had weaseled its way into headquarters, taking up residence on a server used for clearing credit card transactions.

FORBES: Criminal Outbreak

The eToys sites also offered "one-click" shopping, which allows customers to leave their credit card details once in a secure server and then make repeat orders with a single mouse click.

BBC: Hamleys

Yahoo wants to prove the influence by comparing different ads in similar demographics, and comparing data from a server address, a zip code, and credit card info from a purchase.

FORBES: Yahoo, Kardashian & the Spectrum of Engagement

Once Scob's writers--most likely an organized band of code-crunchers in Russia--spotted that retail server, they were able to then implant a "Trojan horse" on it to collect credit card data and zap the info over the Internet to 16 separate computers in Russia.

FORBES: Criminal Outbreak