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KT Corp. Conceals Malware Infections Leading to Data Breach

KT Corp. Conceals Malware Infections Leading to Data Breach

First seen 2 Dec 2025, 18:33 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

KT Corp., South Korea's second-largest mobile carrier, concealed critical malware infections and failed to report security breaches that resulted in a hacking incident and data theft. A government-led investigation revealed these security failures, linking them to a recent cyberattack affecting customer data.

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