Which versions of py-sys-utils are malicious?

The following PyPI versions of py-sys-utils are flagged malicious: 3.0.1, 3.2.4. Treat any of these as compromised.

How do I remediate py-sys-utils if I installed it?

py-sys-utils 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.

I already installed py-sys-utils — how do I know if it already compromised me?

If py-sys-utils 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.

Is py-sys-utils part of a known attack campaign?

Yes — py-sys-utils is associated with the RLMA-2025-04801, GENERIC-standard-pypi-install-pentest, RLUA-2026-00618 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find py-sys-utils across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for py-sys-utils (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging py-sys-utils across your stack and pipelines.

Malicious package

py-sys-utilsPyPI

Malicious code in py-sys-utils (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2025-47794

Immediate action

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

pip uninstall py-sys-utils

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

2 flagged

3.0.13.2.4

Indicators of compromise (SHA-256)

2996d0ca23390a89d9cef8c29bf840293236cfd0b2f3925f1b70aa0dc6114b7a

35d95f5426d289821cfffb82d4f55cf23c78e58a1f4ea2e4dc11ea09fea11a90

0f9d0b03bfee3afe8585a595eb40b5bb3d9d59db389bc864641b19aadd6bb764

7b206069b60b701f297970d529712bca200ad45f535c678a46cc3cc182c77027

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for py-sys-utils (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging py-sys-utils across your stack and pipelines.
If you installed it — respond
py-sys-utils 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 py-sys-utils 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 py-sys-utils 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. py-sys-utils on PyPI has been identified as a malicious package (versions 3.0.1, 3.2.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-04801GENERIC-standard-pypi-install-pentestRLUA-2026-00618

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193)
ReversingLabs · finder

Detect & block this

O3 blocks py-sys-utils-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