PowerShell-Driven Multi-Stage Windows Malware Using Text Payloads

SHADOW#REACTOR is a sophisticated multi-stage malware campaign that uses obfuscated VBS to bootstrap large inline PowerShell stagers which fetch architecture-specific text staging files (qpwoe64.txt/qpwoe32.txt), reconstruct and load a .NET assembly protected with .NET Reactor, and ultimately hand off execution to MSBuild to run Remcos RAT entirely in memory; the report details downloader behavior, anti-analysis measures, obfuscated configuration retrieval, and the modular pipeline attackers use to update components and evade detection.