LWA-2026-10410 MAL-2026-12912 ↗ confirmed malware

bnpl-blocks-desktop-bnpl-anchor-title@35.2.5

Malicious code in bnpl-blocks-desktop-bnpl-anchor-title (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting Interpreter

Analysis

On require, the package runs a bootstrap that downloads a binary payload and executes it. It fetches the payload over HTTPS from three Cloudflare Workers endpoints (oob-worker[.]cf103-070[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, path /pkg/package or platform-specific variants), with a fallback download channel that encodes the payload in DNS TXT records served from c[.]sdk[.]dl[.]wel1[.]ru (and per-platform sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru). The downloaded binary is written to /tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), made executable, and launched detached via cmd.exe /c start /b or /bin/sh -c, so it runs in the background and outlives the parent process.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:23 PM
analyzed
Aug 5, 2026, 04:09 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.