LWA-2026-10292 MAL-2026-13195 ↗ confirmed malware

dolyame-ui-themes@35.6.3

Malicious code in dolyame-ui-themes (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1059 · Command and Scripting Interpreter

Analysis

On import, dolyame-ui-themes@35.6.3 runs a hidden loader (_loader.js) that downloads a platform-specific binary payload and executes it. The loader fingerprints the OS/arch, then fetches the payload over HTTPS from rotated C2 endpoints oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If HTTPS fails it falls back to DNS-TXT discovery via c[.]sdk[.]dl[.]wel1[.]ru and sdk[.]dl[.]wel1[.]ru. The downloaded content is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process via /bin/sh -c "<path> &" or cmd.exe /c start /b. The package is a UI-themes module with no legitimate reason to download and run binaries.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 03:07 PM
analyzed
Aug 5, 2026, 03:20 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.