LWA-2026-10448 MAL-2026-12895 ↗ confirmed malware

bnpl-blocks-atom-bnpl-star-rating@35.8.2

Malicious code in bnpl-blocks-atom-bnpl-star-rating (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1568.002 · DNS CalculationT1059.003 · Windows Command Shell

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

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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.