ant-mcp-proxy-for-testPyPI
Advisory published Updated
ant-mcp-proxy-for-test is a confirmed malicious PyPI package (MAL-2026-2669) that steals credentials and exfiltrates sensitive data (malicious version 0.10.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in ant-mcp-proxy-for-test (PyPI)
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):
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Downloads and executes a remote executable.
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action-hidden-in-lib-usage
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for ant-mcp-proxy-for-test (version 0.10.0).
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.
Did it already run?
If ant-mcp-proxy-for-test was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
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.