@helpcentre/tesco-helpnpm

On npm install, the postinstall hook runs node index.js, which performs an HTTPS POST to https://f1ackavab3.execute-api.eu-west-2.amazonaws.com/ carrying the installer's hostname (os.hostname()) and current working directory (process.cwd()) as JSON. The package has no other functionality. The scoped name @helpcentre/tesco-help targets a Tesco-branded internal namespace, and the inflated 999.0.0 version is the canonical dependency-confusion technique used to override a private package of the same name when an installer's registry config falls back to public npm. Installers who resolve this package leak host-identifying reconnaissance data to an attacker-controlled API Gateway endpoint, enabling targeted follow-on attacks against the affected build environment.