npm · Malicious package advisory
Malwarezakkixd1
MAL-2026-19045
Malicious code in zakkixd1 (npm)
Details
zakkixd1 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. When the socket connects, code in lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363419868857431@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).
Compromised versions (4)
- 27.0.24
- 27.1.25
- 27.1.26
- 27.2.1
Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.