dolyame-ui-navigation@35.7.3

Analysis

dolyame-ui-navigation@35.7.3 is a trojanized "UI toolkit" that acts as a multi-stage binary dropper. On require, it fingerprints the OS/architecture and downloads a platform-specific executable from Cloudflare Workers C2 endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If the HTTP download fails, it falls back to a covert DNS-TXT channel that reconstructs a base64 payload from numbered TXT records queried against c[.]sdk[.]dl[.]wel1[.]ru and per-platform resolver domains (sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process via /bin/sh -c "<path> &" or cmd.exe /c start /b. The package's own index.js exports a harmless stub class; the malicious behaviour runs from the bundled _compat.js.