npm · Malicious package advisory
Malware@zyrennofficiall/baileys
MAL-2026-18684
Malicious code in @zyrennofficiall/baileys (npm)
Details
@zyrennofficiall/baileys is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own WhatsApp account to WhatsApp Channels chosen by the publisher. A timer started when the socket connects, in lib/Socket/newsletter.js, sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363408893555851@newsletter, 120363426470081124@newsletter, 120363427718144294@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. This is separate from the update-channel follow the package announces in lib/Socket/index.js. Same behaviour as the PhantomSub family (MAL-2026-17342).
Compromised versions (5)
- 5.1.0
- 5.2.0
- 5.3.0
- 5.4.0
- 5.5.0
Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.