GCVE-110-OSM-2026-12152

package.json declares `preinstall: node index.js`, causing index.js to execute automatically on `npm install`. The script collects os.hostname(), os.userInfo() (username/uid/gid/shell), platform, arch, homedir, and the stdout of `whoami`, `id`, and `pwd` via child_process.exec, then POSTs the aggregated JSON to a hardcoded endpoint at https://smi54v4uvb9q7ve5t6fnyro16scj0co1.oastify.com/system-info (a Burp Collaborator out-of-band host). No legitimate functionality is present; the package's sole effect on install is host reconnaissance and exfiltration to an attacker-controlled OOB collector. ENTRY index.js (install-hook: node index.js) - Install Hook Executes Local JS File in package.json DESTINATION - 2 exfil (oast, custom-c2) (values recorded in verified_iocs) EXFIL - OAST/Interactsh Exfiltration in index.js: "oastify.com" - System Information Collection in index.js: "os.userInfo()" - Suspicious Domain in index.js: "oastify.com" ADDITIONAL FINDINGS - Shell Command Execution in index.js: "require('child_process')" - Very New NPM Publisher Account - Publisher Has Other Malicious Packages PAYLOAD FILES index.js