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South Korean megachurches probe suspected AI-linked cyberattacks

By Thomson Reuters Oct 6, 2026 | 10:00 PM

SEOUL, Oct 7 (Reuters) – Two South Korean megachurches are investigating suspected cyberattacks that may have exposed the personal data of hundreds of ​thousands of congregants, with evidence suggesting AI ‌tools may have been used in the attacks, according to the churches and a cybersecurity firm.

Here are some details:

• Cybersecurity company Oasis Security found data, attack records and account information ‌on ​an overseas server that contained ⁠information linked to Seoul’s ⁠Yoido Full Gospel Church and Sarang Church.

• Records of the alleged attacks included signs that AI tools were used during the intrusion, such as ​references to “sub-agents” and extensive attack reports that appeared automated, Oasis Security said.

• Yoido Full Gospel Church ⁠said on Wednesday that ⁠initial analysis indicated data relating to 850,000 ​members may have been compromised.

• The data included names ​and dates of birth with a smaller number ‌of records containing changes to national identification numbers, addresses and telephone numbers.

• The church said it was notifying affected members, blocking external access and changing ⁠server passwords.

• Sarang Church, in Seoul’s Seocho district, said it had formed an emergency task force, reported the suspected ⁠incident to ‌relevant authorities and was taking steps ⁠to determine what happened and prevent ​further harm.

• ‌The news follows hacking attacks against ​South Korean ⁠commercial banks that led to a breach of customers’ personal information. South Korean President Lee Jae Myung said on Tuesday that AI was believed to have been used in the cyberattacks.

(Reporting by Joyce LeeEditing ​by Ed Davies)