{"id":"MAL-2026-19024","summary":"Malicious code in vanzdev (npm)","details":"vanzdev 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 and then MUTE, so the channel goes unnoticed, for a list downloaded at runtime from https://raw.githubusercontent.com/LevviCodeID/Levi4than/refs/heads/main/levvleys.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:37.349428756Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"domains":["raw.githubusercontent.com"],"files":[{"digests":{"sha256":"a1a0cfc48f6dd84839f9442d9b3bde8530d89a127395b4008f7e9ede72102fa8"},"paths":["lib/Socket/newsletter.js"]}],"ips":[],"urls":["https://raw.githubusercontent.com/LevviCodeID/Levi4than/refs/heads/main/levvleys.json"]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/vanzdev"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"vanzdev","ecosystem":"npm","purl":"pkg:npm/vanzdev"},"versions":["3.0.4","3.0.5","3.0.6"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/vanzdev/MAL-2026-19024.json","cwes":[{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."}]}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}