{"id":"MAL-2026-19033","summary":"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).","modified":"2026-11-09T23:15:37.895057746Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"urls":[],"domains":[],"files":[{"digests":{"sha256":"3704f8f5787aa19d4aa783a91a3d7ce22dc5c91df426156e8b1654205d4630d8"},"paths":["lib/Socket/newsletter.js"]},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"4757ace51d6f23a66ae761caf4caaa30ea5d48547f1a8ab20db3dc401b632c5b"}},{"digests":{"sha256":"8f658bc0ea894ec074ba502882d8b9f4f8a045cdcd3402e8d99bb5a5c3eac0ae"},"paths":["lib/Socket/newsletter.js"]},{"digests":{"sha256":"bc6ef3d10cab52ddb022f102294e9d2e008dbee4d65c07f59bce296a83b748ac"},"paths":["lib/Socket/newsletter.js"]}],"ips":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/wertybailz"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"wertybailz","ecosystem":"npm","purl":"pkg:npm/wertybailz"},"versions":["1.0.10","1.0.11","1.0.13","1.0.5","1.0.6","1.0.8","1.0.9"],"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/wertybailz/MAL-2026-19033.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}