South Korean brokerage Daishin Securities disclosed a cyberattack exposing personal and credit information belonging to 38,490 customers. Its October 28 customer notice says suspicious access was detected on October 17, and the data leak was confirmed on October 26.
The eight affected data categories include names, email and postal addresses, communications IDs, bank names, bank account numbers, Daishin account numbers, and mobile numbers. The company says both types of account numbers and the mobile numbers were encrypted. The specific information exposed varies by customer.
The incident involved a server linked to remote securities-account opening for discretionary investment services. Daishin blocked attack-related IP addresses and reported the intrusion to regulators. It said no unauthorized access to core business systems had been identified, Hankook Ilbo reported.
Daishin says it has found no evidence so far of further harm from the leaked information, while warning customers about impersonation calls, suspicious links, and requests for financial information. It plans individual notifications and compensation for resulting losses under applicable laws and procedures.
The brokerage is strengthening access controls, monitoring, and checks on externally connected systems. The disclosure follows earlier financial-sector incidents, including the Gopax and Prabang breaches covered by CoinScreamer this month. The reports do not establish a common attacker.
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