devplatform-cli-plugin-generator@35.3.5

Analysis

On require, the package runs a bootstrap that fingerprints the host platform/arch, then downloads a second-stage binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, path /pkg/package, with platform-specific variants /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If the HTTPS download fails it falls back to a DNS TXT-based resolver on the wel1[.]ru domain (c[.]sdk[.]dl[.]wel1[.]ru) that reconstructs the payload from base64 TXT records. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c '... &' on POSIX). The package ships a large decoy telemetry module and a stub class; the malicious bootstrap runs automatically on import.