GCVE-110-OSM-2026-12682

package.json declares postinstall="node index.js", so `npm install fabric-render-bridge` automatically executes index.js. index.js reads Minecraft launcher credential stores across multiple launchers (launcher_accounts.json and launcher_profiles.json for the official launcher, PrismLauncher, MultiMC, TLauncher, Modrinth, PolyMC, GDLauncher) plus a session dump from the OS temp directory, extracts accessToken/refreshToken values and account usernames, and POSTs them via https.request to a hardcoded Discord webhook at discord.com/api/webhooks/1554065488726990909/. A separate sendInfo() routine POSTs os.hostname(), os.userInfo().username, os.platform() and os.release() to the same webhook on every install. The package presents itself as a Fabric render bridge but ships no rendering functionality; its sole install-time behavior is credential and host-identity theft. ENTRY index.js (install-hook: node index.js) - Install Hook Executes Local JS File in package.json PERSISTENCE - Startup Persistence in index.js: ".profile" DESTINATION - 1 exfil (discord-webhook) (values recorded in verified_iocs) EXFIL - Webhook Data Exfiltration in index.js: "discord.com/api/webhooks/1554065488726990909/TBdTnJ7WNkFZySIT2n2cnX1U95QTXM3vsnM..." - Network Request in index.js: "https.request(" - System Information Collection in index.js: "os.userInfo()" PAYLOAD FILES index.js