boxy-fixture @35.6.4

Summary

On require() of the package, index.js loads _support.js which executes setup() at module load. The code reconstructs Cloudflare Workers hostnames (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) from split-string arrays, downloads a platform-specific binary via https.get, writes it to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start with unref(). A DNS-TXT covert-channel fallback reconstructs the payload from base64-encoded TXT records under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru (chunk count from c.<domain>, chunks from <i>.<domain>). A second copy of the dropper primitives (base64 chunk assembly, chmodSync 0755 via string concatenation, detached /bin/sh -c spawn) is bundled in lib/telemetry.js under an 'Analytics SDK' label. Filenames masquerade as analytics_state and dotnet_diag_*.exe.

Source: amazon-inspector (bb575dd1ac71dc5968106b313680bb84dd0d90172e82c1a79887b085ba55b4bd)