OTX Threat: Analysis of Kimsuky's Attack on a South Korean Groupware Vendor Using a New Gomir Family Variant

Between 2025 and early 2026, the North Korean-linked Kimsuky group infiltrated South Korean groupware vendors through vulnerability exploitation and spear-phishing. They deployed two new malware variants, BirdTroy and DriveTroy, based on the Gomir/HttpTroy family. BirdTroy uses custom protocols and HTTP/3 (QUIC) for command-and-control communication, while DriveTroy abuses Google Drive as a C2 cha Sectors: Technology