devplatform-spa-errors@35.5.7

Analysis

devplatform-spa-errors@35.5.7 is a trojanized "internal SDK" that runs a multi-stage dropper on import. index.js requires _loader.js, which immediately downloads a platform-specific binary (linux_x64:/pkg/package, win32:/pkg/package.exe, darwin:/pkg/loader_mac, linux_arm64:/pkg/package-arm64) over HTTPS from Cloudflare Workers out-of-band hosts oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf99-9b3[.]workers[.]dev. If those fail it falls back to a DNS-TXT-chunked base64 download from c[.]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 detached via cmd.exe /c start /b or /bin/sh -c "<file> &". A 6-hour cache marker (.analytics_state) throttles re-downloads. The package fetches and executes a remote second-stage binary on every import.