bnpl-blocks-atom-bnpl-no-index-link@35.1.2
Malicious code in bnpl-blocks-atom-bnpl-no-index-link (npm)
Analysis
On require, the package runs a bootstrap that fingerprints the OS/architecture and downloads a platform-specific second-stage binary from Cloudflare Workers endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe. If the download fails it falls back to retrieving the payload via DNS TXT records from *.dl[.]wel1[.]ru (sd[.]k[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru). The downloaded binary is written to a hidden temp path (.cache_<hex> on Unix, dotnet_diag_<hex>.exe on Windows) and executed detached via cmd.exe /c start /b or /bin/sh -c '&', so it outlives the parent process.
- analyzed by
- Leitwacht
- first seen
- Aug 5, 2026, 01:02 PM
- analyzed
- Aug 5, 2026, 01:43 PM
Related advisories
- bnpl-blocks-atom-bnpl-dropdown@35.5.5
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- bigops-utils@35.4.8
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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.