Jewel - Osco hit again by data hack - hacker installed malware into the portion of Supervalu 's computer network that processes payment cards at some of its Cub stores , as well as its Shop'n Save and Shoppers Food & Pharmacy chains located respectively in the St. Louis and the Washington , D.C. , areas . Supervalu believes the malware may have succeeded in capturing account numbers , and in some cases , expiration dates , and cardholders ' names at the four stores . ;