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 (0d1d5c6a3a1bb7d8a26a77aada7abbec439922ebceec32b8608909ad2ee8acac)
On require of index.js, _shim.js executes immediately and fetches an opaque binary from one of three string-concatenation-obfuscated origins (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS TXT fallback under *.dl.wel1.ru. The fetched bytes are written to /tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<uid>.exe on Windows, chmod 0755, and spawned detached via /bin/sh -c or cmd. No hash or signature verification is performed. Hostnames, the DNS resolver domain, and the child_process module name are assembled at runtime via array-join concatenation to evade static analysis. The package name/version, masqueraded staging filename (dotnet_diag), dotfile staging path, and covert DNS-TXT fallback channel are consistent with a targeted supply-chain dropper.