The json-validator-utils npm package contains malicious code that acts as a multi-stage dropper. When its public API (validateJson/validateXml) is called, it decodes a hardcoded command-and-control URL and downloads a platform-specific payload. This payload is executed on the host system and establishes persistence by creating and enabling systemd units on Linux or LaunchAgents plists on macOS. The execution is delayed by checking the system uptime to evade short-lived sandbox analysis.