devplatform-react-form@35.8.3

Analysis

devplatform-react-form@35.8.3 executes a multi-stage dropper on require. Its index.js loads _adapter.js, which fingerprints the OS platform/architecture and downloads a platform-specific second-stage binary over HTTPS from Cloudflare Workers hosts oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev and oob-worker[.]cf102-baf[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If HTTPS is blocked it falls back to DNS TXT chunked transfer from c[.]sdk[.]dl[.]wel1[.]ru (variants ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched detached via cmd.exe /c start /b or /bin/sh -c. A stamp file (.analytics_state in /tmp, analytics_state in TEMP on Windows) throttles re-execution. The package also ships an 81KB lib/telemetry.js decoy analytics module unrelated to its stated purpose.