The number of computers in North America infected by the Backoff malware, which is blamed for a string of payment card breaches, has risen sharply, according to research from network security company ...

Dairy Queen said Thursday the “Backoff” point-of-sale malware infected systems at 395 of its stores, stealing payment card data. The company, which has 4,500 independently owned franchises in the U.S.

The number of computers in North America infected by the Backoff malware, which is blamed for a string of payment card breaches, has risen sharply, according to research from network security company ...