sme-foundation-frame-manager@20.7.8

Analysis

On require(), the package immediately executes a multi-stage binary downloader. It fingerprints the host platform (OS and architecture), then attempts to download a binary payload from three Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET requests to paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on the platform. If HTTPS fails, it falls back to DNS TXT tunneling through c[.]tin[.]dl[.]well1[.]site (and platform-specific variants tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, win[.]dl[.]well1[.]site) — querying a TXT record for the number of chunks, then fetching base64-encoded data chunks via sequential TXT queries. The downloaded binary is written to /var/tmp/.cache_<randomhex> (Unix) or C:\Windows\Temp\dotnet_diag_<hex>.exe (Windows) and spawned as a detached background process using cmd.exe /c start /b (Windows) or /bin/sh -c "<path> &" (Unix). The package has no lifecycle hooks; the payload runs on module import.