bigops-products-accounts-and-cards@35.7.5

Analysis

On require, the package runs a bundled dropper (_shim.js) that fingerprints the host OS/architecture and downloads a platform-specific second-stage binary over HTTPS from attacker-controlled Cloudflare Workers endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. It falls back to a DNS TXT-based download channel via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under %TEMP% on Windows) and executed detached via /bin/sh -c "<path> &" or cmd.exe /c start /b. Execution is rate-limited by a filesystem stamp file.