bigops-auth@35.8.6

Analysis

bigops-auth@35.8.6 is a trojanized auth-token-handler package that drops and executes a platform-specific binary payload on require(). The package's index.js loads _compat.js at runtime, which: (1) fetches a binary from Cloudflare Workers C2 endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) via HTTPS; (2) falls back to DNS TXT-record-based download via .ru domains (sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru); (3) writes the payload to /var/tmp/.cache_<random> (Linux) or %TEMP%\dotnet_diag_<random>.exe (Windows); (4) executes it as a detached background process. The package has no repository, no lifecycle hooks, and the malicious code runs immediately upon require() — no install hook needed.