The threat actor behind the supply chain compromise of SolarWinds has continued to expand its malware arsenal with new tools and techniques that were deployed in attacks as early as 2019, once indicative of the elusive nature of the campaigns and the adversary’s ability to maintain persistent access for years. According to cybersecurity firm CrowdStrike, which detailed the novel tactics adopted by the Nobelium hacking group last week, two sophisticated malware families were placed on victim systems — a Linux variant of GoldMax and a new implant dubbed TrailBlazer — long before the scale of the attacks came to light.

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