devplatform-cli-contracts@35.7.3

Analysis

On require, the package loads a dropper that fingerprints the host OS/architecture and downloads a binary payload over HTTPS from rotating Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at path /pkg/package (platform-specific variants /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If the HTTPS download fails, it retrieves the payload via DNS TXT records from the *.dl[.]wel1[.]ru domain family (c[.]sdk[.]dl[.]wel1[.]ru, sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c "<file> &" so it outlives the parent. The package also probes for sandbox environments before executing.