bigops-procedure-file-handlers@35.7.6

Analysis

On require, this package acts as a multi-stage dropper. It fingerprints the host platform/architecture, then downloads a second-stage binary over HTTPS from four Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTPS download fails it falls back to a DNS-TXT exfiltration channel 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 dotnet_diag_<hex>.exe in the Windows temp directory), made executable, and launched as a detached background process via cmd.exe /c start /b on Windows or /bin/sh -c "<path> &" on Unix. A cooldown stamp file (.analytics_state / analytics_state) throttles repeated execution.