OK Savings Bank Confirms Data Breach Affecting 250 Customers

OK Savings Bank has confirmed that a hacking incident has resulted in the leak of personal information for 250 customers. The compromised data includes names, birth dates, account numbers, annual income, and loan amounts, among other sensitive financial information.

On October 15, OK Savings Bank announced that, following a thorough investigation with two external security firms, it had verified the leak of personal information from customers who used the bank's online loan application service.

The leaked information includes names, birth dates, mobile phone numbers, account numbers, addresses, email addresses, workplace names, business registration numbers, annual income, and loan amounts related to loan applications.

The hacking attack occurred over a period of approximately five and a half hours, from 8:44 PM on October 11 to 2:14 AM on October 12. The bank detected unusual access patterns about 7 hours and 46 minutes after the attack ended, around 10 AM on October 12.

Subsequently, at 11:35 AM on the same day, the bank urgently deployed a verification logic update and blocked the suspicious IP addresses and access routes. Starting at 7:30 PM, two external security firms were engaged to analyze the breach and conduct a detailed investigation.

On October 13 at 8:40 AM, the bank first reported the potential data leak to the Financial Supervisory Service. It then notified relevant agencies of the data breach at 9 AM on October 15 and began individually notifying affected customers at 9:10 AM.

Currently, OK Savings Bank has posted an apology on its website and is informing customers whose data was compromised via text messages and emails.

An official from OK Savings Bank stated, "We take this data breach incident very seriously and deeply apologize for causing concern to our customers who trust and use our services. We will thoroughly review our personal information protection system and security measures to prevent a recurrence of such incidents."