The npm package @years18/n8n-nodes-utils-helper-t version 1.0.0 contains malicious code that executes during installation and runtime. It collects system information and sends it to a remote server, disables TLS verification, and establishes a command channel allowing remote command execution. Additionally, it installs and runs a Python-based DDoS toolkit on the host. The package name is designed to mimic a legitimate n8n community node to trick users into installing it.