Retail chain Michaels released information regarding the data breach it disclosed in January. About 2.6 million cards may have been affected — about 7% of the cards used at Michaels stores during that time period. The company also found malware at its Aaron Brothers subsidiary. “There is no evidence that other customer personal information, such as name, address or PIN, was at risk in connection with this issue,” the letter says. Michaels says it has “identified and fully contained the incident” and that the malware no longer threatens customers.”]