{"id":"MAL-2026-19015","summary":"Malicious code in shin-yagami (npm)","details":"shin-yagami 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 WhatsApp/node.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363421179449531@newsletter, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).","modified":"2026-11-09T23:15:36.693583459Z","published":"2026-10-27T00:00:00Z","database_specific":{"iocs":{"domains":[],"files":[{"digests":{"sha256":"aa7331459de71d6c787d1f252887a78f393e1a6517e5cbe53ac1d17dbb15316f"},"paths":["WhatsApp/node.js"]}],"ips":[],"urls":[]}},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/shin-yagami"},{"type":"WEB","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"}],"affected":[{"package":{"name":"shin-yagami","ecosystem":"npm","purl":"pkg:npm/shin-yagami"},"versions":["2.0.4"],"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/shin-yagami/MAL-2026-19015.json"}}],"schema_version":"1.9.2","credits":[{"name":"CyberXYZ","contact":["https://cyberxyz.io"],"type":"FINDER"}]}