LWA-2026-10521 MAL-2026-13138 ↗ confirmed malware

dolyame-ui-breadcrumbs@35.6.5

Malicious code in dolyame-ui-breadcrumbs (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting Interpreter

Analysis

On require, the package downloads a platform-specific binary payload from Cloudflare Workers C2 endpoints (oob-worker[.]cf103-07[.]0[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe, with a DNS-TXT chunked base64 fallback from sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, net[.]dl[.]wel1[.]ru. It writes the downloaded binary to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows), makes it executable, and launches it as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "fp &" on Unix). A marker file at /tmp/.analytics_state throttles re-execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 03:35 PM
analyzed
Aug 5, 2026, 05:05 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.