Which versions of py-paypalstrcpu are malicious?

Every published version of py-paypalstrcpu on PyPI is considered malicious. Remove the package entirely.

How do I remediate py-paypalstrcpu if I installed it?

py-paypalstrcpu 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-paypalstrcpu — how do I know if it already compromised me?

If py-paypalstrcpu 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.

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

Search your lockfiles and build artifacts for py-paypalstrcpu (all published versions).

Malicious package

py-paypalstrcpuPyPI

py-paypalstrcpu is a confirmed malicious PyPI package (MAL-2023-5406) that steals credentials and exfiltrates sensitive data. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in py-paypalstrcpu (PyPI)

MAL-2023-5406

Immediate action

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

pip uninstall py-paypalstrcpu

What this malware does

EsqueleSquad group published nearly 6000 malicious PyPi and NPM packages, executing spyware and information-stealing malware

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

566b159212142243256400a72f1cc79803c76bb10b04501d6c55023269806e66

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for py-paypalstrcpu (all published versions).
If you installed it — respond
py-paypalstrcpu 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-paypalstrcpu 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

No. py-paypalstrcpu on PyPI has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

medium.com

Credits

Checkmarx · finder

Detect & block this

O3 blocks py-paypalstrcpu-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

Explore

All malware advisories How O3 detects malware Vulnerability database