dolyame-ui-dropdown@35.6.2

Analysis

dolyame-ui-dropdown@35.6.2 is a trojanized UI-component package that executes a remote-code-execution dropper when required. On load it fingerprints the OS/architecture and downloads a second-stage binary over HTTPS from Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If the HTTPS download fails it falls back to a DNS TXT chunked channel served from c[.]sdk[.]dl[.]wel1[.]ru (and 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 %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched detached via cmd.exe /c start /b on Windows or /bin/sh -c '... &' on POSIX systems.