LWA-2026-10400 MAL-2026-13135 ↗ confirmed malware

dolyame-ui-avatar@35.9.8

Malicious code in dolyame-ui-avatar (npm)

T1059 · Command and Scripting InterpreterT1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1195.002 · Compromise Software Supply Chain

Analysis

On require, the package loads a bundled platform module that fingerprints the OS/architecture and downloads a binary payload over HTTPS from Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf103-070[.]workers[.]dev, paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe), with a DNS-TXT exfil fallback via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or %TEMP%\dotnet_diag_<hex>.exe on Windows) and executed detached via /bin/sh or cmd.exe, so it outlives the parent process.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 03:50 PM
analyzed
Aug 5, 2026, 04:03 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.