statist-browser-typed-client-rubliq.platform.keycloak@20.2.5

Analysis

A trojanized package that downloads and executes a platform-specific binary payload on install. On require(), the code fingerprints the OS and architecture (linux_x64, linux_arm64, darwin, win32), then attempts to download a binary from Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET requests 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 data transfer from c[.]tin[.]dl[.]well1[.]site (and platform-specific subdomains tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, win[.]dl[.]well1[.]site). 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. A cooldown mechanism prevents re-downloading more than once per ~6 hours. The package also includes a large decoy analytics SDK (lib/telemetry.js) to appear legitimate.