npm · Malicious package advisory
Malwarevinzzknight
MAL-2026-19030
Malicious code in vinzzknight (npm)
Details
vinzzknight 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 a list downloaded at runtime from https://raw.githubusercontent.com/VinzzOfficial/Baileys/main/WAProto/id-channel/idch.json, https://raw.githubusercontent.com/VinzzOfficial/Baileys/main/WAProto/id-channel/idgc.json, https://raw.githubusercontent.com/VinzzOfficial/Baileys/main/WAProto/wa-id/idch.json and 1 more, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).
Compromised versions (3)
- 1.0.2
- 1.0.3
- 1.0.4
Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.