More Than Half Of Top 20 Fortune 500 Firms Infected With Gameover Zeus Botnet

The Gameover Zeus botnet is now the biggest financial fraud botnet around, and it's run by a single cybercrime group out of Eastern Europe, according to new research. Brett Stone-Gross, senior security researcher with Dell Secureworks, has been closely monitoring the botnet since late April, with his team "crawling" the peer-to-peer botnet to determine its size and scope, and counted some 678,205 infected bots. He published his overall findings on the inner workings of the botnet last week during Black Hat USA.

"There's one group behind it," Stone-Gross says. "And it's the largest financial botnet out there. Note that the vast majority of these infections are caused by social engineering, and that security awareness training is an essential part of defense against this. 

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