tms-x-headers@20.2.9

Analysis

On require(), tms-x-headers fingerprints the host platform (OS + architecture) and attempts to download a platform-specific binary from Cloudflare Workers C2 domains (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) via HTTPS GET requests to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If direct download fails, it falls back to a DNS TXT-based exfiltration channel via c[.]tin[.]dl[.]well1[.]site, reconstructing a base64-encoded payload from chunked TXT records. The downloaded binary is written to /var/tmp/.cache_<random-hex> (Linux/macOS) or %TEMP%\dotnet_diag_<random-hex>.exe (Windows) and executed as a detached background process. A cooldown file at /tmp/.analytics_state or %TEMP%\analytics_state prevents re-downloading for ~6.2 hours. The package can be suppressed by setting DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, or DO_NOT_TRACK environment variables.