If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: amazon-inspector (0b547ced93ce179bd009fd7e88e23e19ba63fdb224d9b32c62588f05a3fd40f5)
On require('devplatform-spa-di'), index.js loads _polyfill.js which fetches a platform-specific native binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf100-416.workers.dev, cf99-9b3.workers.dev, cf101-adf.workers.dev, cf102-baf.workers.dev), with a DNS-TXT base64 fallback resolving through sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /tmp/.cache_<rand> on POSIX or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. Host strings and DNS domains are reconstructed at runtime by joining split array fragments (e.g. ["oob-worker.cf100-416.worke","rs.dev"].join("")) and cover-story comments frame the dropper as telemetry, with DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK env-var gates and an EXPIRE_SEC mtime stamp implementing dormancy and once-per-host gating. No hash or signature verification is performed. The package's advertised purpose is a small SPA dependency-injection helper, unrelated to native binary execution.