Ben Elgin, Dune Lawrence, and Michael Riley report:
The hackers who raided the credit-card payment system of Neiman Marcus Group (NMG) set off alerts on the company’s security systems about 60,000 times as they slunk through the network, according to an internal company investigation.
The hackers moved unnoticed in the company’s computers for more than eight months, sometimes tripping hundreds of alerts daily because their card-stealing software was deleted automatically each day from the Dallas-based retailer’s payment registers and had to be constantly reloaded. Card data were taken from July through October.
[…]
Ginger Reeder, a spokeswoman for Neiman Marcus, says the hackers were sophisticated, giving their software a name nearly identical to the company’s payment software, so any alerts would go unnoticed amid the deluge of data routinely reviewed by the company’s security team.
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