{"id":"MAL-2026-18710","summary":"Malicious code in kurobails (npm)","details":"kurobails is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own authenticated WhatsApp account to an author-chosen WhatsApp Channel. Part of the campaign OX Security documented as \"PhantomSub\" (2026-09-28): https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/ . Static read of the published 2.0.3 tarball on 2026-10-16 (not executed) found four channel JIDs (120363409616710069, 120363424058761303, 120363424944937940, 120363429340573125, @newsletter) decoded at runtime from base64 or char-code arrays, together with the newsletter FOLLOW query wired to run automatically after the socket connects, with errors suppressed. Same family as the withdrawn MAL-2026-4519 (chromestaff-baileys 1.1.3). Live on npm with no OSV record as of 2026-10-16. (Corrected 2026-10-16: an earlier version of this entry cited 120363421563597486, which in this package only labels forwarded messages.)","modified":"2026-11-05T23:15:04.842150935Z","published":"2026-10-16T00:00:00Z","references":[{"type":"REPORT","url":"https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/kurobails"}],"affected":[{"package":{"name":"kurobails","ecosystem":"npm","purl":"pkg:npm/kurobails"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/kurobails/MAL-2026-18710.json"}}],"schema_version":"1.9.2","credits":[{"name":"OX Security","contact":["https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/"],"type":"FINDER"},{"name":"Patrick Duggan, DugganUSA","contact":["mailto:patrick@dugganusa.com"],"type":"REPORTER"}]}