devplatform-spa-route-tree@35.1.3

Analysis

On require, the package runs a multi-stage dropper. It downloads a binary over HTTPS from Cloudflare Workers hosts oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, and oob-worker[.]cf102-baf[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT chunked fallback via c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The fetched payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under the temp dir on Windows), made executable, and launched as a detached background process via /bin/sh -c "<path> &" or cmd.exe /c start /b. A state file in the temp dir throttles repeat execution. The package also ships an 81KB decoy telemetry module that is never invoked.