tinkoff-pfpa-tools@20.3.1

Analysis

tinkoff-pfpa-tools@20.3.1 is a trojanized SDK that, when required, fingerprints the host OS and architecture, then downloads a binary payload from one of four Cloudflare Workers C2 endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) via HTTPS GET /pkg/package (or platform-specific paths). It also uses a DNS TXT-based fallback channel through c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows) and executed as a detached background process. The package has no repository, no README, and no documented purpose — it is a multi-stage binary downloader.