The npm package @sairidev/baileys-new version 0.3.21 contains malicious code that silently subscribes the victim's WhatsApp account to attacker-controlled channels without user consent. The malicious action leverages the authenticated WhatsApp session of the installer by injecting covert subscription commands into the WhatsApp socket connection. The targeted channels are obfuscated or dynamically fetched, allowing attackers to change targets after installation. The malicious code does not steal credentials, maintain persistence, or execute arbitrary remote code.