trapp-configuration@20.5.3

Analysis

trapp-configuration@20.5.3 is a trojanized config-reader package that downloads and executes a second-stage binary on install. When required, it fingerprints the host platform and architecture, then attempts to download a platform-specific payload from three Cloudflare Workers C2 endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) via HTTPS GET to paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTP download fails, it falls back to a DNS TXT-based C2 channel using the domain tin[.]dl[.]well1[.]site (querying c[.]tin[.]dl[.]well1[.]site for a chunk count, then retrieving base64-encoded chunks from numbered subdomains). The downloaded binary is written to /var/tmp/.cache_<hex> (Linux/macOS) or C:\Windows\Temp\dotnet_diag_<hex>.exe (Windows) and executed as a detached background process. The package has no lifecycle scripts — the payload runs automatically when the module is imported via require("./_adapter") in index.js.