{"id":"MAL-2026-18673","summary":"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).","modified":"2026-11-05T05:15:05.356301788Z","published":"2026-10-26T00:00:00Z","database_specific":{"iocs":{"domains":[],"files":[{"digests":{"sha256":"ae7bbc8bd28e121e1f66b7619c71feed12e138f80fb195944e7a4ebd3efe13e8"},"paths":["lib/Socket/newsletter.js"]}],"ips":[],"urls":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@bellaxchan/sixtech"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"@bellaxchan/sixtech","ecosystem":"npm","purl":"pkg:npm/%40bellaxchan/sixtech"},"versions":["1.1.5"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@bellaxchan/sixtech/MAL-2026-18673.json","cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}]}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}