LWA-2026-10281 MAL-2026-13270 ↗ confirmed malware

devplatform-ui-notification@35.3.6

Malicious code in devplatform-ui-notification (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting InterpreterT1082 · System Information Discovery

Analysis

On require, the package executes a multi-stage dropper. It downloads a platform-specific binary from Cloudflare Workers mirror hosts oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf100-416[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT fallback channel via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c "<path> &". The package's main module is a stub class; the dropper runs automatically when the module is loaded.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:40 PM
analyzed
Aug 5, 2026, 02:59 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.