The data breach at upscale retailer Neiman Marcus discovered this past January was the work of an infamous Russian crime syndicate responsible for the theft of over 160 million credit cards in the past seven years, according to a Bloomberg Businessweek report. U.S. law enforcement has been after the group for years, the report said, but has been hampered by a studied disinterest on the part of Russian officials. The criminal syndicate has been connected to credit cards stolen from over 100 different companies since 2005, including J. C. Penney, 7-Eleven and Citigroup, U.S. officials told the magazine.