LWA-2026-10306 MAL-2026-13181 ↗ confirmed malware

dolyame-ui-scroll@35.4.3

Malicious code in dolyame-ui-scroll (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1059 · Command and Scripting InterpreterT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web Service

Analysis

dolyame-ui-scroll is a combosquat package that acts as a multi-stage dropper. On require, index.js loads _init.js, which downloads a platform-specific binary from attacker-controlled Cloudflare Workers hosts (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev) via HTTPS GET to /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe depending on OS/arch. If HTTPS fails it retrieves the payload in base64 chunks over DNS TXT queries to c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The downloaded binary is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the temp dir on Windows) and executed as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c <path> & on Unix). A /tmp/.analytics_state lock file throttles re-execution. The bundled lib/telemetry.js is a decoy analytics-SDK cover.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 03:21 PM
analyzed
Aug 5, 2026, 03:30 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.