dolyame-ui-storybook-menu@35.5.6
Malicious code in dolyame-ui-storybook-menu (npm)
Analysis
On require, the package immediately downloads and executes a second-stage binary. It fetches a platform-specific payload over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, and oob-worker[.]cf102-baf[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe, with a DNS-TXT fallback that reassembles base64 chunks from c[.]sdk[.]dl[.]wel1[.]ru (and sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe on Windows), made executable, and launched detached via /bin/sh -c "<path> &" or cmd.exe /c start /b. The package otherwise contains only a stub class and a decoy analytics module; its stated purpose is a UI component library.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 02:03 PM
- analyzed
- Aug 5, 2026, 03:58 PM
Related advisories
- dolyame-ui-notification@35.5.4
- bnpl-blocks-mobile-bnpl-notification@35.5.6
- bnpl-blocks-mobile-bnpl-popup@35.5.9
- dolyame-boxy-desktop-bnpl-title@35.6.5
- dolyame-ui-confirmation@35.3.3
- bigops-activity-headers-interceptor@35.6.8
- bigops-legacy-utils@35.2.6
- dolyame-ui-link@35.8.5
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.