tinkoff-statist-browser-typed-client-dss.insurance.service@20.3.2

Analysis

Package tinkoff-statist-browser-typed-client-dss.insurance.service@20.3.2 is a trojanized combosquat package. On require(), it fingerprints the OS and architecture, then downloads a platform-specific binary from one of three Cloudflare Workers C2 hosts (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at path /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe per platform). If HTTPS download fails, it falls back to a DNS TXT-based data channel via c[.]tin[.]dl[.]well1[.]site and related domains (tin[.]dl[.]well1[.]site, tina[.]dl[.]well1[.]site, ldr[.]dl[.]well1[.]site, win[.]dl[.]well1[.]site). The downloaded binary is written to /var/tmp/.cache_<random hex> (Unix) or %TEMP%\dotnet_diag_<random hex>.exe (Windows) and spawned as a detached background process. A marker file at /tmp/.analytics_state or %TEMP%\analytics_state prevents re-infection within ~21 seconds.