LWA-2026-10429 MAL-2026-12893 ↗ confirmed malware

bnpl-blocks-atom-bnpl-skeleton@35.6.3

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

T1195.002 · Compromise Software Supply ChainT1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1071 · Application Layer ProtocolT1102 · Web ServiceT1573 · Encrypted ChannelT1082 · System Information Discovery

Analysis

On require, the package fingerprints the host platform/arch and downloads a platform-specific binary over HTTPS from Cloudflare Workers hosts oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If those fail it falls back to a DNS-TXT-chunked download from c[.]sdk[.]dl[.]wel1[.]ru / ext[.]dl[.]wel1[.]ru / pkg[.]dl[.]wel1[.]ru / net[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe on Windows), made executable, and launched detached in the background via /bin/sh -c or cmd.exe /c start /b.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 04:15 PM
analyzed
Aug 5, 2026, 04:18 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.