GCVE-110-OSM-2026-13256

package.json declares a preinstall script that runs index.js on npm install. index.js collects host identifiers (os.homedir(), os.hostname(), os.userInfo().username, dns.getServers(), current working directory) along with the contents of the package.json and POSTs them over HTTPS to the hardcoded external host meta.brs.cx. This behavior fires automatically on install with no user interaction, and the collected data is characteristic of dependency-confusion / internal-name reconnaissance beacons used to identify targets for follow-on attacks. ENTRY index.js (install-hook: node index.js) - Install Hook Executes Local JS File in package.json DESTINATION - 1 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - OAST/Interactsh Exfiltration in index.js: "burpcollaborator.net" - System Information Exfiltration in index.js: "dns.getServers(), r: packageJSON ? packageJSON.___resolved : undefined, v: packa..." - Network Request in index.js: "https.request(" - System Information Collection in index.js: "os.userInfo()" - Suspicious Domain in index.js: "burpcollaborator.net" ADDITIONAL FINDINGS - Platform Detection with Data Collection in index.js: "JSON.stringify({ p: package, c: __dirname, hd: os.homedir(), hn: os.hostname(), ..." - Brand New Package PAYLOAD FILES index.js