bigops-tasks@35.1.4

Analysis

bigops-tasks@35.1.4 is a multi-stage dropper. On require, index.js loads a bundled _vendor.js module which fingerprints the OS/architecture and downloads a platform-specific binary from a rotating set of Cloudflare Workers hosts (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf10-2-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTP download fails it reconstructs the payload from chunked base64 DNS TXT records served by wel1[.]ru resolver domains (sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), chmod 755, and executed detached via cmd.exe /c start /b or /bin/sh -c "<path> &". The package has no lifecycle hook; the download-and-execute runs on module load.