Description

On npm install, the declared postinstall hook runs node index.js, which reads os.hostname() and a timestamp, base64-encodes the JSON payload, and issues an HTTPS GET to https://estimator-nemeses-unwatched.ngrok-free.dev/canary?d=<base64>. The destination is a hardcoded ngrok tunnel unrelated to any registry or vendor infrastructure, and the beacon fires automatically without any caller action or opt-in. The package's own metadata describes it as a Dependency Confusion to RCE proof-of-concept, and the install-time callback carries the installer's internal hostname to an external third party.

Mitigation

Aliases