<ul><li>SK Telecom revealed that the security breach disclosed in April began in 2022.</li><li>SK Telecom, South Korea's largest wireless telecom company, detected a malware attack in April affecting 27 million users.</li><li>The breach exposed data like phone numbers, IMSIs, SIM keys, and HSS-stored info of users.</li><li>Investigations found that the breach began in 2022, went undetected for nearly three years, and involved 25 malware types across 23 servers.</li></ul>

SK Telecom revealed that malware breach began in 2022

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