Card details were published in four "batches" between 28 October and 27 November. This is the biggest theft and πώληση payment cards of recent years.
"Cards from Turkey are very rare in such stores," said Group-IB. “In the last 12 months, it is the only major sale of payment cards related to Turkish banks ”.
Group-IB, which has been monitoring the case since October, estimated that all cards will be sold to hackers earnings above $ 500.000.
According to the researchers, the exposed cards are so debit as well as credit and come from various Turkish banks.
“All credit and debit cards in this database contained the following information: expiration date, CVV / CVC, cardholder name as well as some additional information such as e-mail, name and phone number ”, said a senior IB Group official.
Having information available, such as emails and phone numbers, means the details of the cards they were not stolen by skimming Appliances that are installed on ATMs or PoS devices.
Researchers believe that the third option is the most likely.
"The source of this leak remains unknown," the company said.
Group-IB informed the Turkish authorities to investigate the case and take appropriate action.