tinkoff-statist-browser-typed-client-sme.platform.mobile.employees.common.events@20.9.9

Analysis

The package is a combosquat/dependency-confusion implant. On require(), it fingerprints the host (platform, architecture, hostname, memory, CPU count), then downloads a platform-specific binary from three Cloudflare Workers C2 endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) via HTTPS GET to paths like /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails, it falls back to DNS TXT-based payload delivery via c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<hex> (Linux/macOS) or %TEMP%\dotnet_diag_<hex>.exe (Windows) and executed as a detached background process. The package includes an 81KB decoy analytics SDK (lib/telemetry.js) that is never called, serving only as padding. No repository, no README, no lifecycle scripts in the manifest — the payload runs silently via require() in index.js.