LWA-2026-10139 MAL-2026-12875 ↗ confirmed malware

bnpl-blocks-atom-bnpl-feedback@35.7.5

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

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1059 · Command and Scripting Interpreter

Analysis

On require, the package runs a bundled downloader that fingerprints the OS/architecture and fetches a platform-specific binary over HTTPS from oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If those hosts are unreachable it retrieves the payload in base64 chunks via TXT DNS records from c[.]sdk[.]dl[.]wel1[.]ru (with sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru as fallbacks). The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe under the Windows temp dir), made executable, and launched as a detached background process via /bin/sh -c "&" or cmd.exe start /b. A state marker at /tmp/.analytics_state throttles repeat downloads.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 01:01 PM
analyzed
Aug 5, 2026, 01:29 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.