LWA-2026-10390 MAL-2026-12996 ↗ confirmed malware

bnpl-blocks-mobile-bnpl-link-group@35.2.3

Malicious code in bnpl-blocks-mobile-bnpl-link-group (npm)

T1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1568.002 · DNS Calculation

Analysis

On require, the package downloads a platform-specific second-stage binary over HTTPS from Cloudflare Workers hosts (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on OS/arch. If HTTPS fails it retrieves the payload via DNS TXT records chunked from the wel1[.]ru domain family (c[.]sdk[.]dl[.]wel1[.]ru). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under %TEMP% on Windows), chmod 755, and executed detached via /bin/sh or cmd.exe /c start /b, so it runs in the background and outlives the parent process.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:41 PM
analyzed
Aug 5, 2026, 04:00 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.