LWA-2026-7353 MAL-2026-12147 ↗ confirmed malware

beaver-ui-icon-lock@12.2.3

Malicious code in beaver-ui-icon-lock (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScriptT1059.003 · Windows Command ShellT1105 · Ingress Tool TransferT1071.001 · Web ProtocolsT1573.001 · Symmetric CryptographyT1082 · System Information DiscoveryT1059 · Command and Scripting Interpreter

Analysis

The postinstall hook runs setup.js, which downloads and executes a platform-specific binary. It detects the OS and architecture, then fetches a binary from Cloudflare Workers subdomains (oob-worker[.]cf paths: /pkg/package, /pkg/package-arm64, /pkg/loader_mac, /pkg/package.exe) with a DNS TXT fallback via well1[.]site. The downloaded binary is written to /var/tmp/.cache_* (Linux/macOS) or %TEMP%\dotnet_diag_*.exe (Windows) and launched as a detached background process. On Windows, the download uses powershell Invoke-RestMethod. A 6-hour timestamp file prevents repeated downloads. The package also requires("./setup") on module load via index.js.

analyzed by
Leitwacht
first seen
Aug 1, 2026, 01:04 PM
analyzed
Aug 1, 2026, 01:06 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.