tinkoff-statist-browser-typed-client-mb.reliability.android.events@20.5.4

Analysis

On require(), the package fingerprints the host OS and architecture, then contacts a set of Cloudflare Workers C2 endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) over HTTPS to download a platform-specific binary payload. If the HTTPS download fails, it falls back to a DNS TXT record-based binary download from the domains tin[.]dl[.]well1[.]site, tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, and win[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<random-hex> (Linux/macOS) or %TEMP%\dotnet_diag_<random-hex>.exe (Windows), made executable, and spawned as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c on Unix). The package also includes an 81KB decoy analytics-SDK module (lib/telemetry.js) that is never actually invoked — it serves only as camouflage. The package name impersonates a Tinkoff-banking internal namespace.