Hackers hit four South Korean banks using AI pentest tool ARTEX AI

Shinhan, KB Kookmin, Hana and BNK Busan banks suffered breaches using the open-source AI pentest tool ARTEX AI. Leaks affected about 25,000 Shinhan customers and dozens of staff at other banks; the FSC held an emergency meeting.

• Shinhan Bank: data of about 25,000 people leaked via a loan-agent portal
• KB Kookmin — 119 victims, Hana — 89, BNK Busan — 11
• Attacks targeted internal staff systems; customer-facing services were unaffected
• FSC ordered banks to audit externally accessible systems and access controls