A hacker is releasing customer records after a bank in the United Arab Emirates refused to pay a ransom of $3 million in bitcoins.

Most of the bank’s customers, however, did not learn that their data had been stolen and published online until the newspaper contacted them.

Files purporting to come from the hacker, and viewed by WIRED, appear to show bank customer credit card transactions for purchases made at retailers and restaurants around the world, including the US. The records include the credit card number, amount of purchase and authorization code, though not the customer name. Other files purport to show the balances on 50,000 bank cards. Some of the files are Excel spreadsheets; others appear to be entire SQL databases stolen by the hacker.

Source: Hacker Leaks Customer Data After a United Arab Emirates Bank Fails to Pay Ransom