hubert-appointment-v2-task-create-am@20.4.4

Analysis

On require(), the package fingerprints the host OS and architecture (linux/x64, darwin/arm64, win32/x64, etc.), then downloads a platform-specific binary from a rotating set of Cloudflare Workers C2 endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GETs to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS download fails, it falls back to DNS TXT-record-based retrieval from domains under dl[.]well1[.]site (tin[.]dl[.]well1[.]site, tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, win[.]dl[.]well1[.]site), reassembling base64-encoded chunks. The downloaded binary is written to /var/tmp/.cache_<random-hex> (Linux/macOS) or %TEMP%\dotnet_diag_<random-hex>.exe (Windows) and spawned as a detached background process via cmd.exe /c start /b (Windows) or /bin/sh -c (Unix). A cooldown marker file at /tmp/.analytics_state or %TEMP%\analytics_state prevents re-download within ~6 hours. The package also includes an 81KB decoy telemetry SDK (lib/telemetry.js) to appear legitimate.