The number of persons affected by a recent data breach at Evolve Bank & Trust exceeds 7.64 million, a document submitted to the Office of the Maine Attorney General this week by the law firm representing the financial services organization reveals.

According to the document, the breach occurred on February 9, but was not discovered until May 29. In a letter sent to its customers and released on Monday, the firm, which is headquartered in Memphis, Tennessee, said it “identified that some of its systems were not working properly. While it initially appeared to be a hardware failure, we subsequently learned it was unauthorized activity.”