bigops-logs-player@35.2.8

Analysis

bigops-logs-player is a trojanized "log transport" package whose index.js loads a bundled _polyfill.js on require. _polyfill.js fingerprints the OS/architecture, then downloads a second-stage binary from Cloudflare Workers hosts oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf102-baf[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If the HTTP download fails it retrieves the payload via a DNS TXT-record covert channel under sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched detached via cmd.exe /c start /b or /bin/sh -c, so it runs in the background and outlives the parent. A marker file (/tmp/.analytics_state or %TEMP%\analytics_state) limits re-execution to roughly once every 5.8 hours.