tinkoff-statist-browser-typed-client-itsa.corporatemessenger.clientv1.web.events@20.9.9

Analysis

At require time, the package silently loads _adapter.js which fingerprints the OS/architecture, then downloads a platform-specific binary payload from Cloudflare Workers C2 infrastructure (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) via HTTPS GET to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTPS fetch fails, it falls back to a DNS TXT-based exfiltration channel via c[.]tin[.]dl[.]well1[.]site (and platform-specific variants). The downloaded binary is written to /var/tmp/.cache_<random> (Linux) or C:\Windows\Temp\dotnet_diag_<random>.exe (Windows) and spawned as a detached background process. The package exports a benign EventBus class to mask its behaviour.