GCVE-110-OSM-2026-11135

package.json declares a preinstall hook that runs `node index.js` on every `npm install`. index.js collects installer host identity and system files — os.hostname(), os.userInfo(), home directory, DNS server configuration, /etc/passwd, /etc/hosts, and the full package.json — and HTTPS POSTs the payload to the hardcoded Burp Collaborator subdomain e4jw9ucdu7sdebgoqqx919p6qxwoke83.oastify.com. The exfiltration fires unconditionally at install time with no user interaction. Judge assessment: This is a clear install-time data-theft implant aimed at the host that installs the npm package. The `preinstall` hook in `package.json` runs `node index.js`, and that script immediately collects `os.hostname()`, `os.userInfo().username`, `os.homedir()`, `dns.getServers()`, the full `package.json`, and sensitive local files like `/etc/passwd` and `/etc/hosts`. It then HTTPS POSTs the payload to the hardcoded Burp Collaborator/OAST domain `e4jw9ucdu7sdebgoqqx919p6qxwoke83.oastify.com`, which is classic exfiltration infrastructure for a developer-targeting attacker model. The OSV advisory is corroborated by the actual file contents and IOCs, so this should be treated as confirmed malicious rather than merely suspicious. 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 - Sensitive File Access in index.js: "'/etc/passwd'" - OAST/Interactsh Exfiltration in index.js: "oastify.com" - Network Request in index.js: "https.request(" - System Information Collection in index.js: "os.userInfo()" - Suspicious Domain in index.js: "oastify.com" PAYLOAD FILES index.js