KT Breach Investigation Reveals Malware Infections in 94 Servers

Mk.Co.Kr

KT Breach Investigation Reveals Malware Infections in 94 Servers

First seen 29 Dec 2025, 10:19 UTC • •40.1

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ThreatCluster •March 12, 2026 at 13:27 UTC

The Ministry of Science and ICT announced the findings of a public-private investigation into a breach at KT. Out of 33,000 servers inspected, 94 were infected with 103 types of malware, including BPFDoor and Rootkit, which infiltrated during file uploads starting in April 2022.

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Threat Graph

5 entities, 3 inferred relationships (STIX 2.1).

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Technique (2)

Data Breach
Malware

Organization (1)

KT

Malware (1)

BPFDoor

Affected Platform (1)

Femtocell

Relationships

BPFDoor targets KT
Data Breach targets Femtocell
Malware targets Femtocell

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