Overview

• SK Telecom detected a malware-based cyberattack on Saturday night, compromising internal systems and potentially exposing USIM card data.
• The company promptly removed the malware, isolated affected systems, and launched a full-scale investigation with support from KISA.
• No confirmed misuse of leaked information has been reported, and SK Telecom is offering free USIM protection services to customers as a precaution.
• The Ministry of Science and ICT has formed an emergency response team and dispatched experts to assist in determining the breach's scope and cause.
• Under South Korea's Personal Information Protection Act, SK Telecom could face significant fines or sanctions if found in violation of security mandates.