twork-data-services-role-app@20.9.6

Analysis

The package is a multi-stage binary dropper. On require(), it fingerprints the platform (OS, architecture), then attempts to download a second-stage binary from three Cloudflare Workers C2 endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) via HTTPS GET to /pkg/package. If HTTPS fails, it falls back to a DNS TXT-based covert channel using *.dl[.]well1[.]site domains to reconstruct a base64-encoded payload. The downloaded binary is written to /tmp/.cache_<random> (Linux/macOS) or %TEMP%\dotnet_diag_<random>.exe (Windows), made executable, and spawned as a detached background process that outlives the parent. The package's index.js exports a benign-looking class but silently loads the dropper on import.