LWA-2026-10537 MAL-2026-12717 ↗ confirmed malware

devplatform-jscodeshift-plugin@35.4.1

Malicious code in devplatform-jscodeshift-plugin (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1568.002 · DNS CalculationT1195.002 · Compromise Software Supply Chain

Analysis

On module load, this package downloads and executes a remote binary. It fetches a platform-specific payload over HTTPS from four Cloudflare Workers endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe, with a DNS-based fallback download channel via TXT records under c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows) and executed as a detached background process via cmd.exe /c start /b or /bin/sh -c '... &'. A filesystem timestamp stamp at /tmp/.analytics_state limits re-downloads.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 05:15 PM
analyzed
Aug 5, 2026, 05:17 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.