GCVE-110-OSM-2026-14050

deposit-limit-fe@100.100.101 is published as a 'Deposit limit frontend utilities' library but its main entry (index.js) exports an empty object and ships no real functionality. package.json declares `postinstall: node postinstall.js`, which require()s a bundled Linux x64 native addon at `prebuilds/linux-x64/addon.node` inside a silenced try/catch. The addon has no corresponding C/C++ source or binding.gyp in the tarball. On load it reads the environment variables HOSTNAME, USER, npm_package_name, and npm_config_registry, forks, opens a TCP socket to the hardcoded bare IP 64.181.165.115, and sends `POST /dc HTTP/1.0` with a form-encoded body `h=<hostname>&p=<package>&u=<user>&r=<registry>`. The anomalous 100.100.101 version and the explicit exfiltration of `npm_config_registry` are the fingerprint of a dependency-confusion reconnaissance beacon targeting an internal/private npm registry package name. Installing this package automatically leaks the installer's hostname, OS username, and private npm registry URL to an attacker-controlled endpoint and executes opaque native code on the installer's machine. ENTRY index.js (main: index.js) DESTINATION - 2 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - Data Encoding for Exfiltration in index.js: "encodeURIComponent(os.hostname" - Network Request in index.js: "http.get(" - System Information Collection in index.js: "os.hostname()" - Suspicious Domain in index.js: "http://64.181.165.115" ADDITIONAL FINDINGS - Publisher Has Other Malicious Packages - Very New NPM Publisher Account PAYLOAD FILES index.js