bigops-storio-store-adapter@35.9.8

Analysis

bigops-storio-store-adapter@35.9.8 is a trojanized "state container" package whose index.js loads a bundled dropper (_bridge.js) on require. The dropper downloads a remote binary over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with DNS-based failover discovery via TXT records on 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 temp dir on Windows), made executable, and launched as a detached background process via /bin/sh -c '<file> &' or cmd.exe /c start /b. This is a remote code download-and-execute dropper that runs an attacker-supplied binary on the host.