statist-browser-typed-client-test.jumpwork.circuitbreaker@20.8.2

Analysis

On require(), the package executes a multi-stage binary dropper. It fingerprints the host OS and architecture, then attempts to download a platform-specific binary payload from three Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]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 DNS TXT record tunneling through domains tin[.]dl[.]well1[.]site, tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, or win[.]dl[.]well1[.]site (platform-specific). The downloaded binary is written to /var/tmp/.cache_<hex> (Linux) or %TEMP%\dotnet_diag_<hex>.exe (Windows), made executable, and launched as a detached background process that outlives the parent. The package has no repository, no meaningful README, and was published under a nonsensical dotted name with a single version.