GCVE-110-OSM-2026-11931

The package's preinstall lifecycle script (preinstall.js) reads the installer's OS hostname, username, and current working directory via os.hostname(), os.userInfo().username, and process.cwd(), encodes them into a URL path, and issues an HTTP GET to a hardcoded bare-IP endpoint at http://209.126.81.147/etoro-depconf-.../npm/<hostname>/<username>/<cwd>. The package name 'etoro-builders' combined with the implausibly high version 999.0.0 and minimal placeholder contents is consistent with a dependency-confusion payload designed to win resolution against a private internal package and beacon successful installs to the operator. Installer host identifiers leave the machine at npm install time to a third-party bare-IP host over cleartext HTTP. ENTRY preinstall.js (install-hook: node preinstall.js || true) - Install Hook Executes Local JS File in package.json DESTINATION - 1 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - Data Encoding for Exfiltration in preinstall.js: "encodeURIComponent(os.hostname())}/${encodeURIComponent(os.userInfo().username)}..." - Network Request in preinstall.js: "https.get(" - System Information Collection in preinstall.js: "os.userInfo()" - Suspicious Domain in preinstall.js: "http://209.126.81.147" PAYLOAD FILES preinstall.js