LWA-2026-10722 MAL-2026-13597 ↗ confirmed malware

dolyame-ui-scrollblock@35.8.1

Malicious code in dolyame-ui-scrollblock (npm)

T1059.007 · JavaScriptT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1102 · Web ServiceT1059 · Command and Scripting InterpreterT1082 · System Information Discovery

Analysis

On require, the package fingerprints the OS/architecture and downloads a second-stage binary from a rotating list of Cloudflare Workers endpoints (oob-worker[.]cf100-416[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, oob-worker[.]cf102-baf[.]workers[.]dev, path /pkg/package, /pkg/package-arm64, /pkg/loader_mac, or /pkg/package.exe). If the download fails it falls back to a DNS-TXT exfiltration channel via c[.]sdk[.]dl[.]wel1[.]ru. The downloaded payload is written to /var/tmp/.cache_<hex> (or dotnet_diag_<hex>.exe in the Windows temp dir), made executable, and launched as a detached background process via cmd.exe /c start /b or /bin/sh -c '... &'. This is a remote binary download-and-execute dropper that runs automatically when the module is loaded.

analyzed by
Leitwacht
first seen
Aug 7, 2026, 10:27 AM
analyzed
Aug 7, 2026, 10:28 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.