SK Telecom Reveals Long-Term Malware Intrusion Leading to Massive IMSI Data Leak

SK Telecom has disclosed a malware intrusion that remained hidden for nearly two years, resulting in the leak of 26.69 million IMSI records. The attack began in 2020 and was discovered in 2022. IMSI (International Mobile Subscriber Identity) are unique identifiers used to identify users on mobile networks. This leak of sensitive data could have serious implications for user privacy.