LWA-2026-10155 MAL-2026-12874 ↗ confirmed malware

bnpl-blocks-atom-bnpl-fade-overflow@35.7.2

Malicious code in bnpl-blocks-atom-bnpl-fade-overflow (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting InterpreterT1082 · System Information Discovery

Analysis

On require, the package immediately downloads a second-stage binary payload from Cloudflare Workers hosts oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf101-adf[.]workers[.]dev (paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe depending on OS). If HTTPS fails it falls back to a DNS-TXT chunked transfer channel via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows) and executed as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c '<file> &' on POSIX).

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