devplatform-spa-plugin-query@35.8.5

Analysis

On require, the package loads a bundled dropper (_bootstrap.js) that downloads and executes a remote binary. It fetches a platform-specific payload over HTTPS from a rotating list of C2 hosts (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails it falls back to a DNS TXT chunked-transfer channel via c[.]sdk[.]dl[.]wel1[.]ru (with resolvers 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 (cmd.exe /c start /b on Windows, /bin/sh -c '&' on POSIX).