LWA-2026-10451 MAL-2026-12902 ↗ confirmed malware

bnpl-blocks-atom-desktop-bnpl-highlighted-text@35.2.3

Malicious code in bnpl-blocks-atom-desktop-bnpl-highlighted-text (npm)

T1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information Discovery

Analysis

On require, the package runs a dropper that fingerprints the OS and architecture, then downloads a second-stage binary over HTTPS from Cloudflare Workers hosts (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTP download fails, it falls back to a DNS-TXT channel via c[.]sdk[.]dl[.]wel1[.]ru that reassembles base64 chunks. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in %TEMP% on Windows), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c. A marker file (/tmp/.analytics_state or %TEMP%\analytics_state) throttles repeat execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 04:16 PM
analyzed
Aug 5, 2026, 04:29 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.