beaver-ui-smart-filter@35.1.9

Analysis

beaver-ui-smart-filter is a trojanized "React components" package whose main entry point loads a bundled dropper (_adapter.js) on require. The dropper fingerprints the platform and downloads a platform-specific binary from Cloudflare Workers hosts oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf99-9b3[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If the HTTP download fails it falls back to a DNS TXT exfiltration channel under dl[.]wel1[.]ru (c[.]sdk[.]dl[.]wel1[.]ru and per-platform sdk./ext./pkg./net[.]dl[.]wel1[.]ru), reassembling base64 chunks. The fetched payload is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "&" on Unix). The package performs no legitimate UI function.