bigops-opening-file-handler@35.9.2

Analysis

On module load the package executes a bundled dropper (_support.js) that downloads a platform-specific binary from a rotating set of Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If the HTTP download fails it retrieves the payload in base64 chunks via DNS TXT records from the domain dl[.]wel1[.]ru (subdomains sdk., ext., pkg., net.). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched as a detached background process via /bin/sh -c or cmd.exe /c start /b. Execution is rate-limited by a state file at /tmp/.analytics_state.