devplatform-react-hooks@35.5.7

Analysis

devplatform-react-hooks@35.5.7 is a multi-stage dropper. Requiring the package runs _init.js, which fingerprints the OS/architecture and downloads a binary second-stage over HTTPS from Cloudflare Workers hosts oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf100-416[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on platform. If the HTTPS download fails it falls back to a DNS TXT exfiltration channel via c[.]sdk[.]dl[.]wel1[.]ru (and ext/pkg/net[.]dl[.]wel1[.]ru per-arch). The downloaded payload is written to a temp file (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows), made executable, and launched detached (cmd.exe /c start /b on Windows, /bin/sh -c '&' on Unix) so it runs in the background. The package's declared react-hooks API is a stub; its only real behaviour is fetching and executing a remote binary.