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ESET documented the evolution of MATCHBOIL, a custom C downloader used by the Russia-aligned cyberespionage group UAC-0099. Samples span April 2024 to April 2026, although CERT-UA first documented the malware in August 2025. Each iteration became more sophisticated, with new obfuscation, sandbox checks and persistence methods. All victims…
Kaspersky's analysis of Operation FlashHole describes a Lazarus Group campaign against South Korean organizations. It follows Operation SyncHole and is placed within the broader Cascade Hole activity. The earliest evidence dates to July 2025 (securelist.com, bleepingcomputer.com), and Kaspersky identified at least three victims in the sof…
Symantec reports that the Russia-linked APT28 (aka Swallowtail, Fancy Bear, Forest Blizzard, BlueDelta), which the U.S. government links to the GRU, targeted organizations in two NATO member states. Victims were a naval shipbuilder, a manufacturer of military aircraft engines and a law enforcement agency (thehackernews.com, cyberscoop.com…
