Which versions of spoof-user-agent are malicious?

The following PyPI versions of spoof-user-agent are flagged malicious: 5.31.6. Treat any of these as compromised.

How do I remediate spoof-user-agent if I installed it?

Remove spoof-user-agent 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 spoof-user-agent — how do I know if it already compromised me?

If spoof-user-agent 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.

Is spoof-user-agent part of a known attack campaign?

Yes — spoof-user-agent is associated with the RLMA-2025-04264 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 spoof-user-agent across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for spoof-user-agent (version 5.31.6).

Malicious package

spoof-user-agentPyPI

spoof-user-agent is a confirmed malicious PyPI package (MAL-2025-41766) that executes malicious code on install (malicious version 5.31.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in spoof-user-agent (PyPI)

MAL-2025-41766

Immediate action

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

pip uninstall spoof-user-agent

Malicious versions

1 flagged

5.31.6

Indicators of compromise (SHA-256)

a5f6e146c45993cf65e8f32be4758dfff258ce7be7ebe863b39b4232227da543

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for spoof-user-agent (version 5.31.6).
If you installed it — respond
Remove spoof-user-agent 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 spoof-user-agent 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. spoof-user-agent on PyPI has been identified as a malicious package (version 5.31.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-04264

Credits

ReversingLabs · finder

Detect & block this

O3 blocks spoof-user-agent-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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