beaver-ui-search-dropdownnpm
beaver-ui-search-dropdown is a confirmed malicious npm package (MAL-2026-12822) that executes malicious code on install (malicious version 35.4.5). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in beaver-ui-search-dropdown (npm)
What this malware does
The package presents itself as a UI dropdown library but on require executes _init.js, which selects a platform-specific asset (linux/darwin/win32), fetches an opaque binary over HTTPS from string-fragmented *.workers.dev hosts (assembled via .join('') to hide the hostname from static scanners) with a DNS-TXT chunked-base64 fallback to *.dl.wel1.ru, writes the payload to /var/tmp or %TEMP% under a disguised name (dotnet_diag_<hex>.exe on Windows, .cache_<hex> on Unix), chmods it 0755, and spawns it detached via /bin/sh -c "<file> &" or cmd.exe /c start /b. The require("child_"+"process") split, the fragmented CDN host arrays, the.NET-diagnostics filename masquerade, and an analytics_state marker file provide cover-story framing. There is no pinning, hash verification, publisher-matched origin, or relation to a UI dropdown component. Installing or importing the package results in arbitrary attacker-controlled code executing on the installer's host.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for beaver-ui-search-dropdown (version 35.4.5). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging beaver-ui-search-dropdown across your stack and pipelines.
If you installed it — respond
Remove beaver-ui-search-dropdown from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If beaver-ui-search-dropdown was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks beaver-ui-search-dropdown before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks beaver-ui-search-dropdown-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.