The npm package 'route-processor' version 3.1.5 contains malicious code that fetches and executes arbitrary JavaScript from a concealed remote URL. This code runs with full Node.js capabilities, including access to require, process, and filesystem modules. The package also includes suspicious dependencies used to harvest browser-stored credentials and fingerprint the host machine, which are unrelated to its advertised functionality. This behavior enables remote code execution and credential theft on any system using this package version.