bnpl-blocks-atom-bnpl-range@35.6.6
Malicious code in bnpl-blocks-atom-bnpl-range (npm)
Analysis
On require, the package executes a bundled downloader (_shim.js) that fetches a second-stage binary over HTTPS from Cloudflare Workers hosts (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If those fail, it reconstructs the payload from base64 chunks retrieved via DNS TXT queries against c[.]sdk[.]dl[.]wel1[.]ru (and sdk/ext/pkg/net[.]dl[.]wel1[.]ru). The downloaded binary is written to a hidden file in /tmp or %TEMP% (.cache_<hex> or dotnet_diag_<hex>.exe) and launched detached via cmd.exe /c start /b or /bin/sh -c, so it runs in the background. A filesystem stamp (.analytics_state / analytics_state) rate-limits re-execution. The package's declared API (index.js) is a stub; the downloader runs unconditionally on require.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 04:14 PM
- analyzed
- Aug 5, 2026, 04:17 PM
Related advisories
- bnpl-blocks-atom-bnpl-text@35.8.8
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- devplatform-cli-plugin-generator@35.3.5
- dolyame-boxy-atom-desktop-bnpl-highlighted-text@35.5.6
- devplatform-react-query-s3-client@35.8.7
- dolyame-boxy-atom-desktop-bnpl-container@35.3.3
- devplatform-confirm-input@35.9.8
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.