The Financial Supervisory Service has launched an on-site inspection of Lotte Card, which was targeted by a hacking attack.
The FSS noted on the 2nd, "Lotte Card immediately initiated the on-site inspection after reporting the occurrence of an electronic financial incident related to hacking."
On the 26th of last month, Lotte Card confirmed that some servers were infected with malware during a server inspection and took measures to delete malware found on three servers while checking all servers. Subsequently, on the 31st of last month, they discovered traces of an external attacker attempting to leak data on the online payment server and reported it to the financial authorities the day before.
The size of the leaked data is estimated to be around 1.7 gigabytes (GB). As of the first half of this year, the number of Lotte Card customers is 9.67 million, with a market share of 10.1% based on credit sales. Lotte Card stated that, as of now, it has not confirmed whether any personal information, including customer data, has been leaked.
An FSS official said, "We are currently investigating the facts regarding the possible leak of customer information in conjunction with the Financial Security Agency," and added, "The FSS will swiftly clarify the facts to ensure that financial consumers do not suffer any harm and take necessary measures."