bnpl-blocks-atom-bnpl-star-rating@35.8.2
Malicious code in bnpl-blocks-atom-bnpl-star-rating (npm)
Analysis
A multi-stage remote loader disguised as a "star rating abstraction layer". On require, index.js loads _shim.js, which fingerprints the host platform/architecture and downloads a second-stage binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on OS. If the HTTPS download fails, it reconstructs the payload via chunked DNS TXT queries against *.dl[.]wel1[.]ru (c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The fetched payload is written to a hidden file (.cache_<hex> in /var/tmp on Unix, dotnet_diag_<hex>.exe in TEMP on Windows), chmod 755, and executed detached via cmd.exe /c start /b (Windows) or /bin/sh -c "<file> &" (Unix). Execution is rate-limited by a filesystem timestamp stamp and can be suppressed by DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK env vars.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 04:15 PM
- analyzed
- Aug 5, 2026, 04:20 PM
Related advisories
- bnpl-blocks-atom-bnpl-store-button@35.2.8
- dolyame-boxy-atom-desktop-bnpl-highlighted-text@35.5.6
- bnpl-blocks-desktop-bnpl-category-gallery@35.2.8
- bnpl-blocks-independent-bnpl-documents@35.6.6
- bnpl-blocks-mobile-bnpl-footer@35.4.3
- bnpl-blocks-mobile-bnpl-link-group@35.2.3
- bigops-status-selection@35.3.2
- bigops-statements-timeline@35.2.4
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.