LWA-2026-10691 MAL-2026-13537 ↗ confirmed malware

ded-pwa-test-pub-pkg@35.8.4

Malicious code in ded-pwa-test-pub-pkg (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102.001 · DNST1082 · System Information DiscoveryT1059 · Command and Scripting Interpreter

Analysis

On require(), the package fingerprints the host platform/architecture and downloads a platform-specific second-stage binary over HTTPS from three Cloudflare Workers hosts (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe. If the HTTPS download fails it falls back to a DNS-TXT tunneling channel that reassembles a base64 binary from TXT records under c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The fetched binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the Windows temp dir) and executed in the background detached from the parent: cmd.exe /c start /b on Windows, /bin/sh -c "<path> &" on Unix. A state flag file is written to /tmp/.analytics_state (or TEMP\analytics_state) to throttle repeat downloads, and the downloader skips execution if DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, or DO_NOT_TRACK is set.

analyzed by
Leitwacht
first seen
Aug 7, 2026, 07:11 AM
analyzed
Aug 7, 2026, 07:13 AM

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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.