Hotel chains such as Hyatt, Sheraton, Marriott and Westin in 10 states and the District of Columbia may have been targeted by hackers for months. HEI Hotels & Resorts says that malware put into place in at least 20 locations — including five in California — may have collected names, credit card account numbers, expiration dates and verification codes. Customer information may have been compromised between December-June. HEI also says that data collection may have begun as early as March 2015.
