LWA-2026-10357 MAL-2026-12822 ↗ confirmed malware

beaver-ui-search-dropdown@35.4.5

Malicious code in beaver-ui-search-dropdown (npm)

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

Analysis

On module load this package (a stub UI component with no real functionality) executes a hidden dropper (_init.js). It downloads a platform-specific second-stage binary over HTTPS from Cloudflare Workers endpoints oob-worker[.]cf102-baf[.]workers[.]dev, oob-worker[.]cf101-adf[.]workers[.]dev, oob-worker[.]cf99-9b3[.]workers[.]dev, and oob-worker[.]cf103-070[.]workers[.]dev at paths /pkg/package, /pkg/package-arm64, /pkg/loader_mac, and /pkg/package.exe. If HTTPS is blocked it falls back to DNS TXT chunked base64 transfer from the domains c[.]sdk[.]dl[.]wel1[.]ru, ext[.]dl[.]wel1[.]ru, pkg[.]dl[.]wel1[.]ru, and net[.]dl[.]wel1[.]ru. The downloaded payload is written to /tmp/.cache_<hex> (POSIX) or %TEMP%\dotnet_diag_<hex>.exe (Windows), made executable, and launched as a detached background process (cmd.exe /c start /b on Windows, /bin/sh -c "… &" on POSIX). A marker file in /tmp or %TEMP% throttles repeat execution.

analyzed by
Leitwacht
first seen
Aug 5, 2026, 02:14 PM
analyzed
Aug 5, 2026, 03:50 PM

Related advisories

browse all confirmed advisories →

Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.