wertybailz

MAL-2026-19033

Malicious code in wertybailz (npm)

Details

wertybailz 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) 120363410018949906@newsletter, 120363420757607688@newsletter, 120363425177067841@newsletter, 120363425869049995@newsletter, 120363426748858626@newsletter (stored as base64 strings), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

Compromised versions (7)

1.0.10
1.0.11
1.0.13
1.0.5
1.0.6
1.0.8
1.0.9

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.