(Bloomberg) -- Wendy’s Co., which reported a payment-card hack earlier this year, said that the breach affected about 18 percent of its U.S. locations.

Criminals used malicious software to access customers’ names, credit- and debit-card numbers and expiration dates from about 1,025 franchised restaurants, Bob Bertini, a spokesman for the Dublin, Ohio-based company, said in an e-mail on Thursday. The company is working to get a list of the affected locations on its website. Last month, Wendy’s confirmed that it had disabled the malware and said the attack was “considerably” bigger than it previously thought.

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