tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage@20.4.5

Analysis

Package tinkoff-statist-browser-typed-client-investaccounting.events.templatepage.mainpage is a combosquat downloader. On require, _bridge.js fingerprints the OS and architecture, then downloads a platform-specific binary from Cloudflare Workers C2 hosts (oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET to /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe per platform). If HTTPS fails, it falls back to a DNS TXT-based data channel via c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_XXXX (Linux/macOS) or %TEMP%\dotnet_diag_XXXX.exe (Windows) and executed as a detached background process. The package also ships an 81KB decoy analytics SDK (lib/telemetry.js) to pad its size and appear legitimate.