The npm package @years20/n8n-nodes-utils-helper-d version 1.0.0 contains malicious code that executes both during installation and when the module is loaded. The payload collects system information, including the machine hostname and SSH public keys, and exfiltrates this data to a remote server with TLS verification disabled. It also decodes and writes an OpenSSH private key to disk and attempts unauthorized SSH logins to local services, reporting successful authentications back to the attacker. This malicious behavior occurs even if installation scripts are ignored, due to the payload being embedded in the main module file.