The baileys-xbats npm package is a malicious fork of the Baileys WhatsApp Web library that silently subscribes the victim's WhatsApp account to attacker-controlled channels without user consent. This behavior affects versions 1.0.0 through 1.0.3. The malicious code issues authenticated FOLLOW queries using the victim's own WhatsApp session. The attack does not involve credential theft, persistence, or remote code execution.