LWA-2026-10779 MAL-2026-13603 ↗ confirmed malware

platform-ui-colors@35.8.1

Malicious code in platform-ui-colors (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1573 · Encrypted Channel

Analysis

On require, the package fingerprints the host platform/architecture and downloads a binary payload over HTTPS from three Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If those fail it falls back to a DNS-over-TXT channel via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "&" on Unix).

analyzed by
Leitwacht
first seen
Aug 7, 2026, 11:25 AM
analyzed
Aug 7, 2026, 11:26 AM

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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.