On the evening of the 19th, there were indications of a data leak related to USIM due to malware by hackers.
Upon identifying the leak, quick reporting and deletion of the malware, along with isolation of suspicious hacking equipment, were performed.
SKT Euljiro Office Building. ⓒSKT, ‘[Dailyan = Reporter Jo In-young] SK Telecom announced on the 22nd that around 11 PM on the 19th, they detected suspicious indications that malware might have caused the leak of some information related to SK Telecom customers’ USIMs. They reported the incident to the Korea Internet & Security Agency (KISA) on the 20th.’,
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, ‘They also reported the suspected personal information leak to the Personal Information Protection Commission at 10 AM that day and explained that they are cooperating with the relevant investigation.’,
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, ‘SK Telecom stated, “After recognizing the potential leak, we immediately deleted the malicious code and isolated the equipment suspected of hacking.” They added, “So far, there have been no confirmed cases of actual misuse of the leaked information.”‘,
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, ‘However, to prevent customer damage, they are conducting a full inspection of the entire system, strengthening the blocking of illegal USIM change and abnormal authentication attempts, and implementing stronger measures for immediate suspension of use and notification upon detecting suspicious signs of damage.’,
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, ‘The company explained that they are providing USIM protection services (free) through their website and T World for customers wishing additional safety measures, alongside notifications to customers through the website.’,
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, ‘For inquiries related to the incident, customers can contact the SK Telecom customer center.’,
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, ‘SK Telecom said, “We will strengthen our security systems further to prevent such incidents from recurring and do our best to prepare measures to protect customer information.” They added, “We sincerely apologize once again for causing concern to our customers.”