Raspberry Robin Malware in 2025: From USB Worm to Elite Initial Access Broker

Raspberry Robin (aka Roshtyak, tracked as Storm-0856) is a sophisticated Windows malware family that has progressed from USB worm behavior to a large-scale initial-access broker delivering ransomware, loaders, and infostealers. The report describes diverse distribution methods (USB LNKs, phishing, malvertising, Discord CDN), DLL side‑loading and WSF-based loaders with anti-analysis checks, living‑off‑the‑land execution, privilege escalation, PAExec-based lateral movement, and a resilient C2 built on fast‑flux DNS, compromised IoT/NAS relays and Tor; it also lists detection opportunities and mitigations.