dolyame-ui-test@35.2.5

Analysis

dolyame-ui-test is a multi-stage dropper disguised as a UI component library. Requiring the package triggers _platform.js, which fingerprints the OS/architecture and downloads a binary payload over HTTPS from Cloudflare Workers hosts oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, and oob-worker[.]cf99-9b3[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the download fails it falls back to a DNS-TXT exfiltration channel: it queries c[.]sdk[.]dl[.]wel1[.]ru (and ext/pkg/net[.]dl[.]wel1[.]ru variants) for a chunk count, then reassembles base64 payload chunks from numbered TXT records. The downloaded binary is written to a temp file (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows) and executed detached via /bin/sh -c "file &" or cmd.exe /c start /b, so it runs in the background and outlives the parent. The payload is fully attacker-controlled and executed on the installer's machine.