{"id":"MAL-2026-18955","summary":"Malicious code in casper-baileys (npm)","details":"casper-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 lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363322461279856@newsletter and a list downloaded at runtime from https://files.giftedtech.co.ke/file/chJids.json (the URL itself stored as base64 strings), using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:30.489909199Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"domains":["files.giftedtech.co.ke"],"files":[{"digests":{"sha256":"1508b7661ece1baa15c8b20280de4ae8b49ccaa4a5fd42d341bd700e97856cf8"},"paths":["lib/Socket/newsletter.js"]},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"a869538e686579a71b3f3126d6fb75d288ece906e52a5d2f6e25a8b0c5e655ad"}}],"ips":[],"urls":["https://files.giftedtech.co.ke/file/chJids.json"]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/casper-baileys"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"casper-baileys","ecosystem":"npm","purl":"pkg:npm/casper-baileys"},"versions":["1.0.0","1.0.1","1.0.2","1.0.3","2.0.0","2.0.1"],"database_specific":{"cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/casper-baileys/MAL-2026-18955.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}