trapp-check-logs@20.1.9

Analysis

trapp-check-logs@20.1.9 is a trojanized npm package that downloads and executes a platform-specific binary payload on the victim's machine. When the package is imported, _bridge.js fingerprints the operating system (Linux x64/arm64, macOS, Windows), then fetches a binary from Cloudflare Workers C2 infrastructure (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) via HTTPS GET requests to /pkg/package (or platform-specific paths). If HTTP fails, it falls back to DNS-based retrieval via TXT queries to c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<random> on Linux/macOS or %TEMP%\dotnet_diag_<random>.exe on Windows, made executable, and spawned as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "binary &" on Linux). The package also probed for sandbox detection via a DNS query to _leitwacht.attached.local. The 81KB lib/telemetry.js file is a decoy analytics SDK that masks the malicious _bridge.js downloader.