AI Tools Cyberattack Investigation: South Korean Megachurches Probe Suspected AI-Linked Cyberattacks
Oasis Security found attack records on an overseas server, and Yoido Full Gospel Church said data on 850,000 members may have been compromised.
- On Wednesday, October 7, 2026, Seoul's Yoido Full Gospel Church and Sarang Church launched investigations into suspected cyberattacks that may have exposed personal data of hundreds of thousands of members.
- Cybersecurity company Oasis Security discovered attack records on an overseas server, pointing to evidence that artificial intelligence tools were likely used during the intrusions, including automated reports and references to "sub-agents."
- Yoido Full Gospel Church reported that data for 850,000 members may have been compromised, including names, dates of birth, and, for a smaller number of individuals, national identification numbers and addresses.
- Sarang Church formed an emergency task force to determine the breach's scope, while Yoido Full Gospel Church is notifying affected members and updating security protocols after reporting the incidents to authorities.
- These incidents follow recent cyberattacks targeting South Korean commercial banks; South Korean President Lee Jae Myung noted on Tuesday that signs had emerged of AI being utilized in those hacking attempts.
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18 Articles
The Economic Times
Times of IndiaAI tools cyberattack investigation: South Korean megachurches probe suspected AI-linked cyberattacks
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.
Fox Business
The New York LedgerSouth Korean megachurches investigate suspected cyberattacks affecting hundreds of thousands
South Korean megachurches Yoido Full Gospel Church and Sarang Church are investigating suspected cyberattacks that may have exposed personal data of hundreds of thousands of members.
Yoido Full Gospel Church, where signs of an external intrusion were detected on its internal servers, revealed that one of the seven suspected leaked documents contains the personal information of 850,000 members. Yoido Full Gospel Church [reported] the circumstances of the church information system intrusion incident through the Korea Internet Security Agency
Yoido Full Gospel Church, the largest church in the country, has been subjected to a cyber attack, raising suspicions that the names and dates of birth of 850,000 members were leaked. The church issued a press release on the 7th stating, "We have confirmed that some personal information was included in the change history of members' information among the suspected leaked data."
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