ST. PAUL — Goodwill Industries said that none of its 44 Minnesota stores, nor any in the Upper Midwest, appear to have been involved in an 18-month-long data breach at some of its stores. Goodwill estimates that 10 percent of its stores nationwide were affected. It appears that cyberthieves placed malware on a vendor’s computer systems, which processed credit card payments. Card numbers, expiration dates and customers’ names all were stolen, Goodwill said. “The malware attack affected the third-party vendor’s system intermittently between Feb.