Which versions of loy are malicious?

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

How do I remediate loy if I installed it?

Remove loy 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 loy — how do I know if it already compromised me?

If loy 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 loy part of a known attack campaign?

Yes — loy is associated with the RLMA-2025-04191 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 loy across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for loy (version 1.0.0).

Malicious package

loyPyPI

loy is a confirmed malicious PyPI package (MAL-2025-41697) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in loy (PyPI)

MAL-2025-41697

Immediate action

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

pip uninstall loy

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

74ee1f03f82ad5518525997ab097127667b5f9a297e3691945f96801865f61e9

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for loy (version 1.0.0).
If you installed it — respond
Remove loy 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 loy 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. loy 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-2025-04191

Credits

ReversingLabs · finder

Detect & block this

O3 blocks loy-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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