Which versions of jec are malicious?

The following PyPI versions of jec are flagged malicious: 39.0.1. Treat any of these as compromised.

How do I remediate jec if I installed it?

Remove jec 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 network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is jec part of a known attack campaign?

Yes — jec is associated with the GENERIC-standard-pypi-install-pentest campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect jec in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking jec and packages like it before any post-install script runs.

Malicious package

jecPyPI

Malicious code in jec (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-5684

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall jec

What this malware does

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
The package overrides the install command in setup.py to execute malicious code during installation.

Malicious versions

1 flagged

39.0.1

Indicators of compromise (SHA-256)

cfd390b5ea0fe558bd7f5fd56dec8386148e58d7f8d4b6bba14f8a2aa8b6d323

Frequently asked questions

No. jec on PyPI has been identified as a malicious package (version 39.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentest

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection