The npm package @revizahoshii/baileys contains malicious code that silently subscribes a victim's WhatsApp account to attacker-controlled channels without user consent. This is achieved by injecting covert subscription actions into the WhatsApp socket layer using the installer's authenticated session. The targeted channels are obfuscated or dynamically fetched, allowing attackers to modify targets after installation. The malicious code does not steal credentials, maintain persistence, or enable remote code execution.