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Malicious package

ant-mcp-proxy-for-testPyPI

Malicious code in ant-mcp-proxy-for-test (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-2669
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall ant-mcp-proxy-for-test

What this malware does

During use of the package, it silently downloads and executes remote executables or scripts. During analysis, the remote resources were no longer available. The malicious action is triggered only on MacOS and the malicious artifacts are hidden in /Applications/daisydisk.app

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-04-ant-mcp-proxy-for-test

Reasons (based on the campaign):

  • Downloads and executes a remote executable.

  • action-hidden-in-lib-usage

Malicious versions

1 flagged
0.10.0

Indicators of compromise (SHA-256)

51df3beb4457da4a841727c91a2517ba5727c841c08f9d43cf2b25be9e476564

Detection & response playbook

Credential / info stealer

  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for ant-mcp-proxy-for-test (version 0.10.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging ant-mcp-proxy-for-test across your stack and pipelines.

  2. If you installed it — respond

    ant-mcp-proxy-for-test is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If ant-mcp-proxy-for-test 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.

  4. How O3 protects you

    O3 blocks ant-mcp-proxy-for-test 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

No. ant-mcp-proxy-for-test on PyPI has been identified as a malicious package (version 0.10.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-04-ant-mcp-proxy-for-test

References

Credits

  • Kamil Mańkowski (kam193) · analyst

Detect & block this

O3 blocks ant-mcp-proxy-for-test-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring
ant-mcp-proxy-for-test (PyPI) malicious package — MAL-2026-2669 | O3 Security