{"id":"MAL-2026-18810","summary":"Malicious code in @billabilloyy/baileys (npm)","details":"@billabilloyy/baileys 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 src/Socket/newsletter.js, src/WAUSync/Protocols/USyncNewsletterProtocol.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363395678317603@newsletter, 120363400362472743@newsletter, 120363408893555851@newsletter, 120363426470081124@newsletter, 120363427718144294@newsletter and the channel invite code(s) 0029VbCX3x9Ae5VxVnDa172S, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:21.339863968Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"urls":[],"domains":[],"files":[{"digests":{"sha256":"f2a46bc73d0af45846b4f5b99344867fe9a492e7a22694d372e85cde204a5f70"},"paths":["src/Socket/newsletter.js"]},{"digests":{"sha256":"3a3dada3a32fb28f20a15473f4275b57ad9fb8ade9b13a4f408ca9ab1503ce09"},"paths":["src/WAUSync/Protocols/USyncNewsletterProtocol.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@billabilloyy/baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@billabilloyy/baileys","ecosystem":"npm","purl":"pkg:npm/%40billabilloyy/baileys"},"versions":["1.0.0"],"database_specific":{"cwes":[{"name":"Embedded Malicious Code","cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature."}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@billabilloyy/baileys/MAL-2026-18810.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}