LWA-2026-10540 MAL-2026-12675 ↗ confirmed malware

ded-pwa-bnpl-forms-demo@35.9.6

Malicious code in ded-pwa-bnpl-forms-demo (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1041 · Exfiltration Over C2 Channel

Analysis

On require, the package fingerprints the host platform/arch and downloads a second-stage binary over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, path /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe). If the HTTPS download fails it reconstructs the payload from chunked base64 TXT DNS records under the wel1[.]ru domain (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 in the Windows temp dir), made executable, and launched as a detached background process via /bin/sh -c or cmd.exe start /b. A timestamp marker file (.analytics_state in /tmp) throttles repeat execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 05:25 PM
analyzed
Aug 5, 2026, 05:26 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.