GCVE-110-OSM-2026-10015

This package looks like a downloader/loader for a custom C2 that persists and launches a payload under the attacker’s control. The entrypoint immediately requires `./_bridge`, which reconstructs `oob-worker.cf103-070.workers.dev`, fetches platform-specific binaries via `https.get`, writes them to a temp path, and executes them with detached `cmd.exe`/`/bin/sh` spawning and `stdio: "ignore"`. The `lib/telemetry.js` path adds startup persistence via `.profile`, dynamic base64 decoding, and additional `https.request(` network activity, which is consistent with a stealthy malware loader rather than legitimate telemetry. The attacker model is a supply-chain implant in an npm package abusing install/import time execution to retrieve and run a second-stage payload while hiding its activity. ENTRY index.js (main: index.js) PERSISTENCE - Startup Persistence in lib/telemetry.js: ".profile" DESTINATION - 2 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - Network Request in _bridge.js: "https.get(" - Network Request in lib/telemetry.js: "https.request(" OBFUSCATION - Dynamic Base64 Decoding in lib/telemetry.js: "Buffer.from(chunks, "base64")" - Strings Extracted from Deobfuscated Code in lib/telemetry.js - recovered 1 domains from decoded/deobfuscated content ADDITIONAL FINDINGS - Stealth Background Process Spawning in _bridge.js: "spawn("cmd.exe", ["/c", "start", "/b", fp], { detached: true, stdio: "ignore", w..." - Reconstructed Obfuscated Domain in _bridge.js: "oob-worker.cf103-070.workers.dev" - Shell Command Execution in _bridge.js: "require("child_process")" - Silent Process Execution in _bridge.js: "stdio: "ignore"" - Detached Child Process Payload in _bridge.js: "spawn("cmd.exe", ["/c", "start", "/b", fp], { detached: true" - Shell Command Variable Setup in _bridge.js: ""cmd.exe", ["/c", "start", "/b", fp], { detached: true, stdio: "ignore", windows..." PAYLOAD FILES _bridge.js (+ lib/telemetry.js)