GCVE-110-OSM-2026-10021

This looks like a downloader/launcher implant aimed at developer workstations: the package entrypoint immediately requires `./lib/telemetry` and `_platform`, which then fetches a platform-specific binary from reconstructed C2 `oob-worker.cf101-adf.workers.dev` or DNS fallback hosts under `wel1.ru`. The code writes the payload to a temp path, marks it executable, and spawns it detached with suppressed I/O via `cmd.exe /c start /b` or `/bin/sh -c ... &`, which is a classic persistence/stealth launcher pattern. The attacker model is a supply-chain compromise or malicious maintainer shipping an npm package that downloads and executes a second-stage payload on import/install; the `.profile` persistence signal and `Buffer.from(..., "base64")` DNS loader strengthen that interpretation. The minimal metadata and critical static score are consistent with a throwaway malware package rather than a legitimate analytics client. ENTRY index.js (main: index.js) PERSISTENCE - Startup Persistence in lib/telemetry.js: ".profile" DESTINATION - 1 exfil (custom-c2) (values recorded in verified_iocs) EXFIL - Network Request in _platform.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 _platform.js: "spawn("cmd.exe", ["/c", "start", "/b", fp], { detached: true, stdio: "ignore", w..." - Reconstructed Obfuscated Domain in _platform.js: "oob-worker.cf101-adf.workers.dev" - Shell Command Execution in _platform.js: "require("child_process")" - Silent Process Execution in _platform.js: "stdio: "ignore"" - Detached Child Process Payload in _platform.js: "spawn("cmd.exe", ["/c", "start", "/b", fp], { detached: true" - Shell Command Variable Setup in _platform.js: ""cmd.exe", ["/c", "start", "/b", fp], { detached: true, stdio: "ignore", windows..." PAYLOAD FILES _platform.js (+ lib/telemetry.js)