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 (404569337a1e5fc46fff2584e052d2f9f99c3cb8d04e5fb3b5c5d633c178e01c)
The package's preinstall lifecycle script runs on npm install and collects the installer's local username (whoami), hostname, and public IP address (fetched via ifconfig.me), then transmits them as query-string parameters in an HTTP GET request to a hardcoded subdomain of oast.fun (kwphewvexhjbtfduscqybx6q7c862eh0g.oast.fun). oast.fun is an out-of-band interaction/callback service commonly used for reconnaissance and exfiltration in dependency-confusion attacks. The behavior fires automatically on default install with no relation to any documented package purpose.