LWA-2026-10381 MAL-2026-13164 ↗ confirmed malware

dolyame-ui-link@35.8.5

Malicious code in dolyame-ui-link (npm)

T1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1082 · System Information DiscoveryT1497 · Virtualization/Sandbox Evasion

Analysis

dolyame-ui-link@35.8.5 is a trojanized "UI toolkit" that downloads and executes a remote binary when loaded. Requiring the package runs _loader.js, which fingerprints the OS/architecture, then fetches a second-stage binary over HTTPS from three Cloudflare Workers endpoints (oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev) at /pkg/package (or /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe depending on platform). If HTTPS fails it falls back to DNS-based loading: it reads TXT records from c[.]sdk[.]dl[.]wel1[.]ru (and sdk/ext/pkg/net[.]dl[.]wel1[.]ru) to reassemble a base64-encoded payload. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe on Windows), made executable, and launched as a detached background process. The package also probes for sandbox/analysis environments before activating.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 02:05 PM
analyzed
Aug 5, 2026, 03:55 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.