SK Telecom has discovered a suspected hacking case and is taking steps to strengthen its security system and protect customer information to prevent recurrence.

SKT announced at around 11:00 PM on the 19th that it had discovered circumstances in which some of SK Telecom customers' SIM-related information was suspected to have been leaked due to malware.

We are currently continuously investigating the exact cause, scale, and items of the leak, and in accordance with relevant laws, we immediately reported the breach to the Korea Internet & Security Agency (KISA) on April 20.

In addition, we reported the personal information leak to the Personal Information Protection Commission at 10:00 AM on the 22nd and are actively cooperating with the related investigation.

SKT said that after recognizing the possibility of a leak, it immediately deleted the malware and isolated the suspected hacking device.

In addition, although there have been no confirmed cases of actual exploitation of the information so far, they stated that in order to prevent damage to customers, they are conducting a comprehensive investigation of the entire system, strengthening the blocking of illegal SIM card changes and abnormal authentication attempts, and strengthening the immediate suspension of use and guidance measures when suspicious signs of damage are found.

In addition, the company said that it is providing SIM card protection service (free of charge) through the website and T World for customers who want additional safety measures along with customer notification through the website.

You can sign up for the SIM protection service at http://skt.sh/nUO7D, and for inquiries related to this accident, please contact SK Telecom Customer Center (080-800-0577).

SKT said, “We will further strengthen our security system and implement customer information protection measures to prevent similar incidents from recurring in the future.”We will do our best in the future as well,” he said, adding, “We sincerely apologize once again for causing concern to our customers.”