GCVE-110-OSM-2026-13400

dransay@99.0.0 declares a `preinstall` lifecycle script that runs `node beacon.js`, which performs a DNS lookup and HTTPS GET against a hardcoded Interactsh (`oast.site`) collaborator subdomain (`db3klhbi6i9hark1kegg174t38h33b6wt.oast.site`) on every `npm install`. The outbound request discloses the installer's source IP, DNS resolver IP, hostname-derived data, and timestamp to a third-party collaborator host unrelated to any first-party publisher. The package name and implausibly high version (99.0.0) are consistent with a dependency-confusion probe targeting an internal package name. The README self-labels the package as a benign dependency-confusion proof-of-concept; the self-label does not change the behavior — install-time, non-consensual outbound network I/O to a researcher-controlled OAST host that collects installer network identity. ENTRY beacon.js (install-hook: node beacon.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 beacon.js: "oast.site" ADDITIONAL FINDINGS - Publisher Has Other Malicious Packages PAYLOAD FILES beacon.js