LWA-2026-10246 MAL-2026-12737 ↗ confirmed malware

devplatform-react-micro-frontend@35.2.1

Malicious code in devplatform-react-micro-frontend (npm)

T1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information Discovery

Analysis

On require, the package runs a dropper that fingerprints the OS/architecture and downloads a remote binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at path /pkg/package (or platform-specific paths), with a fallback staging channel that reads the payload from DNS TXT records under sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in TEMP on Windows), made executable, and launched detached via /bin/sh -c or cmd.exe /c start /b. A state file is written to /tmp/.analytics_state to throttle re-execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:36 PM
analyzed
Aug 5, 2026, 02:38 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.