npm · Malicious package advisory
Malware@bellaxchan/sixtech
MAL-2026-18673
Malicious code in @bellaxchan/sixtech (npm)
Details
@bellaxchan/sixtech 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) 120363431475943819@newsletter (stored base64-encoded), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).
Compromised versions (1)
- 1.1.5
Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.