beaver-ui-object-cardnpm
beaver-ui-object-card is a confirmed malicious npm package (MAL-2026-12819) that executes malicious code on install (malicious version 35.3.8). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in beaver-ui-object-card (npm)
What this malware does
On require('beaver-ui-object-card'), index.js loads ext.js which selects a platform-specific asset path and downloads an unsigned native binary from hardcoded Cloudflare Workers mirrors, with a DNS TXT chunked-base64 fallback resolver, then writes the binary to /var/tmp or %TEMP% under deceptive names (dotnet_diag<hex>.exe on Windows,.cache_<hex> on Unix), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Destination hosts and resolver domains are reassembled at runtime from split-string arrays (e.g. ["oob-worker.cf100-416.worker","s.de","v"].join("") and ['sdk.dl','.wel','1.r','u'].join("")) to defeat static analysis. A cover-story surrounds the dropper: an 'analytics_state' lock file, a DISABLE_TELEMETRY env gate that does not actually disable execution, a node-fetch/2.6 User-Agent, and an unreachable lib/telemetry.js presenting an 'Analytics SDK' facade. The delivered binary is attacker-controlled, unpinned, unsigned, mismatched to any documented package purpose, and executed detached on the installer's host at import time.
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-object-card (version 35.3.8). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging beaver-ui-object-card across your stack and pipelines.
If you installed it — respond
Remove beaver-ui-object-card 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-object-card 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-object-card 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-object-card-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.