LWA-2026-7565 MAL-2026-12411 ↗ confirmed malware

pfp-block-mobile-vacancy-description@20.4.1

Malicious code in pfp-block-mobile-vacancy-description (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1573 · Encrypted ChannelT1082 · System Information DiscoveryT1041 · Exfiltration Over C2 Channel

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.