KB Kookmin becomes latest bank to be hit by cyberattack

The information of some 100 customers was exposed, but the breach did not affect financial transaction systems.

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The logo of KB Kookmin Bank at its branch in Yeongdeungpo District, western Seoul

KB Kookmin Bank has become the latest major lender to suffer a cyberattack, with information belonging to about 100 customers exposed, according to financial authorities on Friday. 

The breach involved a mobile working system used by its employees. The bank reportedly blocked the affected server and access route shortly after detecting signs of abnormal external access that may have led to the leak.

The affected system is unrelated to customer financial transactions, such as internet and mobile banking, according to the bank.

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The Financial Services Commission and Financial Supervisory Service have received a report on the incident from KB Kookmin and are discussing how to respond.

The breach follows another major bank hack. Information belonging to about 25,000 customers at Shinhan Bank was leaked in a new type of cyberattack that used an AI agent, Shinhan Bank said on Thursday.

Authorities are conducting an on-site investigation of the KB Kookmin attack over concerns that the damage could spread further.

 

BY JANG GU-SEUL [lee.jiwon10@joongang.co.kr]

This article was originally written in Korean and translated by a bilingual reporter with the help of generative AI tools. It was then edited by a native English-speaking editor. All AI-assisted translations are reviewed and refined by our newsroom.

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