What does the msrcpoc malware do?

The OpenSSF Package Analysis project identified 'msrcpoc' @ 99.1.9 (pypi) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.

Which versions of msrcpoc are malicious?

The following PyPI versions of msrcpoc are flagged malicious: 99.1.9. Treat any of these as compromised.

How do I remediate msrcpoc if I installed it?

Remove msrcpoc 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 activity or persistence.

I already installed msrcpoc — how do I know if it already compromised me?

If msrcpoc 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 msrcpoc across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for msrcpoc (version 99.1.9).

Malicious package

msrcpocPyPI

Advisory published Aug 24, 2026Updated Aug 25, 2026

msrcpoc is a confirmed malicious PyPI package (MAL-2026-14444) that executes malicious code on install (malicious version 99.1.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in msrcpoc (PyPI)

MAL-2026-14444

Immediate action

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

pip uninstall msrcpoc

What this malware does

The OpenSSF Package Analysis project identified 'msrcpoc' @ 99.1.9 (pypi) as malicious.

It is considered malicious because:

The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

99.1.9

Indicators of compromise (SHA-256)

57de2918e25798c84b17d6a743fbadb99a5e564b8ea34e1ab5d4a0ff6d509df0

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for msrcpoc (version 99.1.9).
If you installed it — respond
Remove msrcpoc 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 activity or persistence.
Did it already run?
If msrcpoc 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. msrcpoc on PyPI has been identified as a malicious package (version 99.1.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks msrcpoc-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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