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Vidar Stealer Unmasked: Code Signing Abuse, Go Loaders and File Inflation
July 7, 2026 · Unit 42 · Severity: MEDIUM
Unit 42 unveils a Vidar Stealer campaign that uses a novel combination of loader-as-a-service and DLL sideloading through a Go-compiled fake MpClient.dll. The attack employs code signing abuse and file inflation to evade security products. This multi-layered evasion approach represents a significant evolution in infostealer delivery.
Key Takeaways
- A cybercrime campaign combined a loader-as-a-service framework and DLL sideloading via a Go-compiled fake.