US Positive Iran Is Behind Wave of Banking Hacks Cyberattacks have caused online slowdowns at several sites By John Johnson, Newser Staff Posted Jan 9, 2013 12:03 PM CST 39 comments Comments Bank of America is among the banks that have been hit, though the hacks didn't affect individual customer accounts. (AP Photo/Lynne Sladky) (Newser) – Just about every big American bank has been hit by cyberattacks in recent months, and while one obscure overseas group has claimed responsibility, US officials think the real culprit is Iran, reports the New York Times. The attacks are too sophisticated to be the work of amateurs and smack of being state-sponsored—the hackers aren't stealing money or corrupting individual accounts, instead opting to cause huge online slowdowns and headaches. Exactly how the attacks are taking place isn't all that clear, but the hackers are apparently hijacking clouds already in place or, scarily, "crafting their own private clouds," an analyst at Forrester Research tells the newspaper. They're also making use of a malware with the slang name of "itsoknoproblembro," which has infected data servers around the world. All this might be payback for the Stuxnet worm that wreaked havoc on Iran's nuclear industry. "It's a bit of a grudge match," says one online security expert.