devplatform-react-utils @35.6.9

Summary

On require of the package, index.js loads _helpers.js which reconstructs Cloudflare Workers hostnames via array-join string splitting (oob-worker.cf{99-9b3,101-adf,102-baf,103-070}.workers.dev), downloads a platform-specific binary, writes it to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start. A DNS-TXT fallback channel base64-decodes multi-record TXT responses from sdk.dl.wel1.ru into the payload bytes. lib/telemetry.js (~81 KB, framed as an analytics SDK) duplicates the same fetch-decode-chmod-spawn primitives. Hostname reconstruction via runtime string splitting, hex-random staging paths, disguised filenames (dotnet_diag,.cache_,.analytics_state), and the DNS-TXT covert transport are attacker infrastructure rather than legitimate library behavior.

Source: amazon-inspector (15880efb2feec5e49ab725414e805293700e451ede11a2e4f3b1fe8e2f8f881c)