dolyame-ui-themes@35.6.3
Malicious code in dolyame-ui-themes (npm)
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
Related advisories
- eacq-acq-menu@35.2.1
- devplatform-jscodeshift-utils@35.3.8
- devplatform-api-v2-resource-mock@35.4.1
- devplatform-react-form@35.8.3
- devplatform-po-loader@35.1.8
- devplatform-spa-plugin-devtools@35.5.6
- devplatform-api-v2-resources@35.3.8
- devplatform-ui-notification@35.3.6
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.