ClickFix Removes Your Background but Leaves the Malware

This report dissects a multi-stage malicious campaign that lures victims to a fake background-removal site which copies a paste-and-run command that uses the legacy finger protocol to fetch a first-stage payload; that chain ultimately installs CastleLoader to orchestrate encrypted shellcode, a reflective PE loader, NetSupport RAT drops, and a custom .NET stealer (CastleStealer) capable of browser credential, wallet and Telegram session theft; the analysis includes detailed behavioral TTPs, code-level techniques for evasion and persistence, network and file IOCs (domains, URLs, IPs, hashes), and mitigation recommendations.