constructor-blocks-renderer-mailings@35.3.3

Analysis

On require, the package downloads a platform-specific binary from one of three Cloudflare Workers hosts (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTP fetch fails it reconstructs a second-stage payload from DNS TXT records served by c[.]sdk[.]dl[.]wel1[.]ru (also 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), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c '... &'. A bundled lib/telemetry.js mirrors the same download-and-execute logic.