This week in security we took a closer look at Fin7, also known as JokerStash, Carbanak, and a host of other names. The cybercrime group rakes in as much as $50 million a month by stealing credit card numbers, most recently from the company that owns Saks Fifth Avenue, Lord & Taylor, and more. They’ve got an interest in ATM hacks, too, and their professional acumen has turned them into what researchers estimate is a billion-dollar enterprise.

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