Dairy Queen Customer Data Compromised by Backoff Malware

International Dairy Queen, the ice cream chain owned by Warren Buffett’s Berkshire Hathaway Inc., said customer data were compromised by hackers.

The breach with the so-called Backoff malware affected 395 of more than 4,500 U.S. locations, the unit of Omaha, Nebraska-based Berkshire said today in a statement. The systems contained customer names, and the numbers and expiration dates of their payment cards. Less than 600,000 cards were affected, said Dean Peters, a spokesman for Dairy Queen.