North Korean hackers stole 830K people’s data in attack on Seoul hospital: ROK | NK News
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September 28, 2026Sep 28, 2026

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North Korean hackers stole 830K people’s data in attack on Seoul hospital: ROK

Police attribute attack to DPRK two years after breach, warning threat actors continue to target health care systems

North Korean hackers accessed the personal medical records of hundreds of thousands of patients at a major hospital in Seoul, police announced Wednesday, in one of the largest known cyberattacks on South Korean civilian infrastructure.

The threat actor hacked into the intranet of Seoul National University Hospital (SNUH) between May and June 2021 using seven domestic and overseas computer servers, according to a ​​Korean National Police Agency (KNPA) press release.

Personal information from some 830,000 people, including 810,000 patients and 17,000 former and current employees, leaked during the attack on SNUH servers, the press release states.

The KNPA attributed