bpm-foundation-feature-flags@20.4.2

Analysis

bpm-foundation-feature-flags@20.4.2 is a trojanized npm package that downloads and executes a second-stage binary on the host. On require(), _compat.js fingerprints the OS and architecture (linux_x64, win32, darwin, linux_arm64), then fetches a platform-specific binary from one of three Cloudflare Workers C2 endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET to paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. As a fallback, it retrieves the payload via DNS TXT queries to c[.]tin[.]dl[.]well1[.]site using chunked base64 reassembly. The downloaded binary is written to /tmp/.cache_<hex> (Linux/macOS) or %TEMP%\dotnet_diag_<hex>.exe (Windows) and executed as a detached background process — cmd.exe /c start /b on Windows, /bin/sh -c "path &" on Unix. The package's index.js is a minimal decoy feature-flags class.