{"id":"MAL-2026-18965","summary":"Malicious code in devilkyuuna (npm)","details":"devilkyuuna 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 the channel ID(s) 120363421930637018@newsletter, 120363422166977077@newsletter, 120363426326511354@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:31.146797922Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"ips":[],"urls":[],"domains":[],"files":[{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"286760765c355a9e77d089288813dd088f7ce69207b73035ba0b0bcee1ceb78a"}},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"992f3a5f442d738c386f52bb96c3e1589b186246e78e539a52bc7828767b8a76"}},{"paths":["lib/Socket/newsletter.js"],"digests":{"sha256":"e6d7b3f634c74b998fd161bff3dd8eece6890cdabf8b8df7f20e334fadfb4a1d"}}]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/devilkyuuna"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"devilkyuuna","ecosystem":"npm","purl":"pkg:npm/devilkyuuna"},"versions":["1.0.11","1.0.12","1.0.13","1.0.14"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devilkyuuna/MAL-2026-18965.json","cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}]}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}