tinkoff-fb-fieldset-car-reference-kasko@20.7.7

Analysis

Combosquat package impersonating a Tinkoff internal library. On require(), the package fingerprints the host OS/architecture, then downloads a platform-specific binary payload from Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) via HTTPS GET to /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe depending on platform). It also attempts DNS TXT-record-based fallback via c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<hex> (Linux) or dotnet_diag_<hex>.exe (Windows) and executed as a detached background process. A marker file at /tmp/.analytics_state prevents re-execution within a 6-hour window.