Sept. 26–A day of disruptions in Wells Fargo & Co.’s electronic banking operations apparently was the latest in a series of cyber attacks that disrupted online operations at Bank of America Corp., Citigroup Inc. and JPMorgan Chase & Co.
A computer security expert blamed massive denial of service attacks, in which perpetrators overwhelm computer servers with communications demands, causing networks to seize up or slow down.
In a posting at Pastebin.com, a group calling itself the Izz al-Din al-Qassam Cyber Fighters claimed responsibility for last week’s outages at Bank of America, Citi, and JPMorgan before hitting Wells Fargo. It said it would attack U.S. Bancorp on Wednesday and PNC Financial Services Thursday.
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