Which versions of web3-checksum are malicious?

The following PyPI versions of web3-checksum are flagged malicious: 1.0. Treat any of these as compromised.

How do I remediate web3-checksum if I installed it?

Remove web3-checksum 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 web3-checksum — how do I know if it already compromised me?

If web3-checksum 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 web3-checksum part of a known attack campaign?

Yes — web3-checksum is associated with the RLMA-2025-02620 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 web3-checksum across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for web3-checksum (version 1.0).

Malicious package

web3-checksumPyPI

web3-checksum is a confirmed malicious PyPI package (MAL-2025-4262) that executes malicious code on install (malicious version 1.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in web3-checksum (PyPI)

MAL-2025-4262

Immediate action

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

pip uninstall web3-checksum

Malicious versions

1 flagged

1.0

Indicators of compromise (SHA-256)

58d9ccc840f7ab8921989b691dc4ca8863ca2396c47391fa3e931456dbbe6529

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for web3-checksum (version 1.0).
If you installed it — respond
Remove web3-checksum 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 web3-checksum 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. web3-checksum on PyPI has been identified as a malicious package (version 1.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-02620

Credits

ReversingLabs · finder

Detect & block this

O3 blocks web3-checksum-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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