Which versions of pywhool are malicious?

The following PyPI versions of pywhool are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate pywhool if I installed it?

pywhool 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 pywhool — how do I know if it already compromised me?

If pywhool 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 pywhool part of a known attack campaign?

Yes — pywhool is associated with the RLMA-2024-04635 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 pywhool 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 pywhool (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pywhool across your stack and pipelines.

Malicious package

pywhoolPyPI

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

MAL-2023-8589

Immediate action

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

pip uninstall pywhool

What this malware does

Malicious packages campaign targeting developers, payload is hidden using Steganography, exfiltrate host information

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

54738d1aef580f087fec1311b411aa6ddd2d7affb4b44353dd7f3d6a569a0ed9

ef3c4d658ed496a088045278a9da4fa3e1a2a547d62c1b84f3266c238615049b

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 pywhool (version 1.0.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pywhool across your stack and pipelines.
If you installed it — respond
pywhool 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 pywhool 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 pywhool 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. pywhool on PyPI has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2024-04635

References

Credits

Checkmarx · finder
ReversingLabs · finder

Detect & block this

O3 blocks pywhool-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