LWA-2026-10700 MAL-2026-13530 ↗ confirmed malware

bnpl-blocks-atom-bnpl-loader@35.1.2

Malicious code in bnpl-blocks-atom-bnpl-loader (npm)

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

Analysis

On require, the package executes setup.js, a remote binary download-and-execute dropper. It fetches a platform-specific binary over HTTPS from Cloudflare Workers hosts oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, and oob-worker[.]cf100-416[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS TXT chunked-transfer fallback from the domains c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The downloaded binary is written to /tmp or the Windows temp directory under a random name (.cache_<hex> or dotnet_diag_<hex>.exe) and launched detached (cmd.exe /c start /b on Windows, /bin/sh -c on Unix), so it runs in the background and outlives the parent process.

analyzed by
Leitwacht
first seen
Aug 7, 2026, 07:13 AM
analyzed
Aug 7, 2026, 07:14 AM

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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.