tramvai-tinkoff-module-legacy-popup@20.4.9

Analysis

The package auto-loads setup.js on require(), which fingerprints the host OS and architecture, then downloads a platform-specific binary payload from Cloudflare Workers C2 infrastructure (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) via HTTPS GET to paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails, it falls back to DNS TXT-based chunked download via the domain tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<random> (or %TEMP%\dotnet_diag_<random>.exe on Windows) and executed as a detached background process. The package has no repository, no README, and exports a dummy class — the entire purpose is to deliver and execute a remote binary payload.