devplatform-humanize-network-error@35.3.8

Analysis

On require, this package downloads and executes a second-stage binary. It fingerprints the OS/architecture and issues HTTPS GET requests to three rotating hosts — oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev — requesting /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe depending on platform). If those fetches fail, it retrieves the payload in chunks via DNS TXT records from c[.]sdk[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp directory on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c. The package presents itself as a network-error utility but its actual behaviour is remote code download and execution at load time.