The npm package @catamania/front-components version 1.0.5 contains malicious code that executes during installation. Its postinstall.js script collects host reconnaissance data such as hostname, username, current working directory, and environment variable names, then sends this information to a hardcoded external URL. The package's main component is benign, indicating the malicious behavior is limited to the install-time script. This behavior suggests a reconnaissance or dependency confusion attack vector.