LWA-2026-10423 MAL-2026-12863 ↗ confirmed malware

bnpl-blocks-atom-bnpl-anchor-menu@35.8.5

Malicious code in bnpl-blocks-atom-bnpl-anchor-menu (npm)

T1195.002 · Compromise Software Supply ChainT1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1071.004 · DNST1041 · Exfiltration Over C2 Channel

Analysis

The package's index.js requires _loader.js, which acts as a multi-stage dropper. On load it downloads a remote binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at path /pkg/package (platform-specific variants /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT chunked-retrieval fallback via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to a hidden file (.cache_<hex> in /var/tmp, or dotnet_diag_<hex>.exe in TEMP on Windows) and executed as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c '<path> &' on Unix). The loader writes an analytics_state stamp file to throttle re-execution. The package is a benign-looking UI module whose real behaviour is remote binary download and execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:00 PM
analyzed
Aug 5, 2026, 04:14 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.