PS1Bot: Multi-Stage Malware Framework Targeting Windows Systems

Cisco Talos researchers have uncovered an aggressive malware campaign active since early 2025, deploying a sophisticated multi-stage framework dubbed PS1Bot, primarily implemented in PowerShell and C#. This threat actor leverages malvertising and SEO poisoning to distribute compressed archives with file names mimicking legitimate search queries, such as “chapter 8 medicare benefit policy manual.zip” or “pambu […]

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