The @smart-dev-wa/baileys npm package version 1.0.0 contains malicious code that automatically subscribes the user's authenticated WhatsApp account to a specific WhatsApp Channel without user consent. This behavior contradicts the package's README claim of no auto-follow functionality. The malicious action occurs when an application using this library creates a WhatsApp socket connection. No credentials or session keys are exfiltrated, and no install-time payload or persistence mechanisms are present. The primary harm is unauthorized use of the victim's account to inflate subscriber counts for the attacker's chosen channels.