bigops-telephony@35.8.4

Analysis

bigops-telephony@35.8.4 is a remote binary download-and-execute dropper. On require, package/_adapter.js fingerprints the OS/architecture and downloads a second-stage binary over HTTPS from oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf102-baf[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If those hosts are unreachable it falls back to DNS-tunneling the payload via TXT queries to c[.]sdk[.]dl[.]wel1[.]ru. The downloaded binary 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 "fp &" on Unix).