pfa-autotests-reporter@20.2.8

Analysis

On require(), the package fingerprints the host operating system and architecture, then downloads a platform-specific binary from attacker-controlled Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) via HTTPS GET requests to paths like /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 domains tin[.]dl[.]well1[.]site, tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, and win[.]dl[.]well1[.]site to reconstruct a base64-encoded binary. The downloaded payload is written to /var/tmp/.cache_<random> (Linux/macOS) or %TEMP%\dotnet_diag_<random>.exe (Windows) and executed as a detached background process with no parent supervision. A marker file at /tmp/.analytics_state (or %TEMP%\analytics_state) prevents re-downloading within approximately 6.4 hours. The package contains an 81KB decoy telemetry SDK (lib/telemetry.js) to appear legitimate.