Daishin reports 38,490 customers’ data exposed in fresh South Korea attack wave

A fresh wave of cyberattacks hit South Korean financial institutions Daishin Securities and Mirae Asset Global Investments, as well as crypto exchange Bithumb, roughly a month after a similar series of attacks. According to local media, Daishin reported exposure of personal data belonging to 38,490 customers, including names, email addresses and mobile phone numbers; the company notified those affected and is cooperating with authorities. Mirae and Bithumb reported separate incidents but did not confirm that customer data was taken.

Security researchers linked the September attacks to a suspected China-based hacker who allegedly used the Artex penetration-testing tool, but officials are still investigating the cause of the latest incidents. South Korea’s financial regulator called for stronger security measures, and the country plans to check dozens of private-sector IT systems. An incident involving Japan’s GMO Internet was also reported, with no connection established between the cases.