An established information stealer (infostealer) has recently been upgraded with enhanced capabilities and filled a vacuum left by the decline of the once-dominant Lumma Stealer. According to a Trend Micro report published on October 21, a new version of the Vidar infostealer has emerged, with a new multithreaded architecture for faster, more efficient data exfiltration and improved evasion capabilities. The upgrade, dubbed Vidar 2.0, was first announced by a developer known as “Loadbaks” on underground forums on October 6. Its release coincides with a decline in activity surrounding Lumma Stealer, which had been the dominant infostealer strain for months before a law enforcement operation disrupted a big part of Lumma’s infrastructure in 2024 and a doxxing campaign targeted its…