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 (15e4272ba48bc8a81c8a76e7948aed6974b40956c151f05a613456e92690f5f2)
package.json declares scripts.preinstall = 'node index.js', so npm install auto-executes index.js. The script collects hostname, username, home directory, local IPv4, INIT_CWD, and the public egress IP (queried from api.ipify.org, icanhazip.com, and ifconfig.me), and reads the consuming project's package.json (INIT_CWD/package.json) to extract name, author, repository, and homepage — identifying which internal package name resolved to this public package. The payload is transmitted to the hardcoded collector da51rv0hb2uc72tg4gvgdepinjcallbk1.oast.fun via HTTPS POST to /poc/<uuid> and, in parallel, hex-encoded and chunked into DNS labels (`<idx>-<chunk>.u-<uuid>.<callback>`) resolved via dns.resolve, providing a fallback exfiltration channel when outbound HTTP is filtered. The package's self-description as a dependency-confusion research PoC does not change the behavior: installer host and parent-project identifiers are shipped to a third-party Interactsh collector without installer consent.