Tuesday, January 06, 2009

CheckFree Warns 5 Million Customers After Hack

Robert McMillan writes on ComputerWorld:

CheckFree and some of the banks that use its electronic bill payment service are notifying more than 5 million customers after criminals took control of several of the company's Internet domains and redirected customer traffic to a malicious Web site hosted in the Ukraine.

The Dec. 2 attack was widely publicized shortly after it occurred, but in a notice [.pdf] filed with the New Hampshire Attorney General, CheckFree disclosed that it was warning many more customers than previously thought.

That's because CheckFree is not only notifying users of its own CheckFree.com Web site of the breach, it is also working with banks to contact people who tried to pay bills from banks that use the CheckFree bill payment service.

"The 5 million people who were notified about the CheckFree redirection were a combination of two groups," said Melanie Tolley, vice president of communications with CheckFree's parent company, Fiserv, in an prepared statement. "1.) those who we were able to identify who had attempted to pay bills from our client's bill pay sites and minus those who actually completed sessions on our site; and 2.) anyone enrolled in mycheckfree.com."

Tolley wouldn't say what banks were affected by the hack, but the majority of these five million customers were CheckFree's own users, she said. In total, about 42 million customers access CheckFree's bill payment site, she said.

More here.


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