delivery-ci-upgrade-form@35.5.9

Analysis

On require, the package loads a bundled _runtime.js which fingerprints the OS/architecture and downloads a second-stage binary from Cloudflare Workers hosts (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) over HTTPS from paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If HTTPS fails it falls back to a DNS-TXT chunked transfer from *.dl[.]wel1[.]ru (c[.]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 under %TEMP% on Windows), chmod 0755, and executed detached via cmd.exe /c start /b or /bin/sh -c, so it outlives the parent process. The package's declared purpose (reusable CI upgrade form components) is unrelated to this behaviour.