Daishin Securities confirmed the breach impacted 38,490 customers, with attackers accessing names, email addresses, and mobile phone numbers. The firm is currently coordinating with authorities and has pledged to provide compensation for any resulting losses. While Mirae Asset and Bithumb reported security incidents on Wednesday, neither has officially confirmed the theft of sensitive client data.
South Korean Financial Sector Reels from New Cyber Incursions
A fresh surge of digital intrusions has targeted South Korea’s financial landscape, compromising major brokerages and a leading cryptocurrency exchange. The incidents, involving Daishin Securities, Mirae Asset Global Investments, and Bithumb, arrive just weeks after a separate wave of attacks exposed systemic vulnerabilities across the nation’s private sector infrastructure.

These events echo a September campaign that investigators linked to a China-based actor utilizing the Artex AI penetration tool. In response, the Financial Services Commission of South Korea mandated intensified security protocols and announced plans to audit dozens of private IT systems. Regional instability is further reflected in Japan, where GMO Internet recently reported a similar cybersecurity event, though officials have not yet established a direct link between the cross-border attacks.



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