Target probe eyes overseas hackers; stolen cards for sale online

WASHINGTON Sat Dec 21, 2013 5:59am IST

People shop at a Target store during Black Friday sales in the Brooklyn borough of New York, November 29, 2013. REUTERS/Eric Thayer/Files

People shop at a Target store during Black Friday sales in the Brooklyn borough of New York, November 29, 2013.

Credit: Reuters/Eric Thayer/Files

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WASHINGTON (Reuters) - Investigators believe that overseas hackers were responsible for the cyber attack on U.S. retailer Target Corp (TGT.N) that compromised up to 40 million payment cards during the first three weeks of the holiday shopping season, a person familiar with the matter said on Friday.

The person, who was not authorized to talk publicly about the matter, declined to say how the hackers got in or where investigators believe they are based, saying investigators don't want to show their hand to the criminals.

Meanwhile the blogger who first broke news of the breach, Brian Krebs, reported that data stolen from Target had begun flooding underground markets that sell stolen credit cards.

KrebsOnSecurity.com reported on Friday that cards stolen from Target were being offered at "card shops" for rates starting at $20 each and going to more than $100.

Target has said that hackers accessed data on up to 40 million payment cards over 19 days through Dec 15 in the second-largest retail breach in U.S. history. It is not known who is behind the attack or how they accessed Target's network.

A Secret Service spokesman declined to comment on the investigation, which the agency is running.

The retailer reported the breach on Thursday, a day after Krebs broke news of the attack. Target has declined to say how its systems were compromised and has provided few other details about the case.

Target sought to reassure customers that it was safe to shop at its stores and encouraged them to do so by offering 10 percent discounts off most merchandise on Saturday and Sunday, the last weekend before Christmas.

"We're in this together, and in that spirit, we are extending a 10 percent discount - the same amount our team members receive," Chief Executive Gregg Steinhafel in a statement on Target's website.

Groceries are eligible for the discount, though video games, gift cards, mobile phones and a few other items are excluded.

Steinhafel said the company would offer free credit monitoring services and downplayed the impact the breach might have on customers.

"We want our guests to understand that just because they shopped at Target during the impacted time frame, it doesn't mean they are victims of fraud," he said. "In fact, in other similar situations, there are typically low levels of actual fraud."

He promised that the guests would "not be held financially responsible for any credit or debit card fraud."

Separately, Target spokeswoman Molly Snyder said in a written statement that "we are hearing very few reports of actual fraud."

She said stolen information was limited to data stored on the magnetic strip.

The hackers did not obtain PIN numbers used to access ATMs or the three or four-digit security codes that are printed on cards to verify online purchases, Snyder said.

She also said Target has provided exposed card numbers to Visa (V.N), MasterCard (MA.N), Discover (DFS.N) and American Express (AXP.N). Those companies are in turn providing the information to the financial institutions that issue them.

(Reporting by Mark Hosenball, Dhanya Skariachan and Jim Finkle; Editing by Steve Orlofsky, Bob Burgdorfer, Andrew Hay)

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