pfp-block-mobile-vacancy-description@20.4.1
Malicious code in pfp-block-mobile-vacancy-description (npm)
Analysis
This package is a binary dropper. When required, _loader.js fingerprints the host platform (os.platform/arch), then downloads a platform-specific binary from Cloudflare Workers C2 endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) via HTTPS GET to paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails, it falls back to DNS TXT chunked transfer via c[.]tin[.]dl[.]well1[.]site. The downloaded binary is written to /var/tmp/.cache_<random> (Linux/macOS) or %TEMP%\dotnet_diag_<random>.exe (Windows) and executed as a detached background process. A lock file at /tmp/.analytics_state or %TEMP%\analytics_state prevents re-execution within a 6-hour window.
- analyzed by
- Leitwacht
- first seen
- Aug 2, 2026, 05:17 PM
- analyzed
- Aug 2, 2026, 05:18 PM
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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.