Which versions of claudeopusenifile are malicious?

The following PyPI versions of claudeopusenifile are flagged malicious: 0.1.3. Treat any of these as compromised.

How do I remediate claudeopusenifile if I installed it?

claudeopusenifile 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 claudeopusenifile — how do I know if it already compromised me?

If claudeopusenifile 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 claudeopusenifile part of a known attack campaign?

Yes — claudeopusenifile is associated with the 2026-09-donutautosellsrc 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 claudeopusenifile across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for claudeopusenifile (version 0.1.3).

Part of a larger attack: 2026-09-donutautosellsrc published 9 malicious packages. See the full campaign →

Malicious package

claudeopusenifilePyPI

Advisory published Oct 25, 2026Updated Oct 26, 2026

claudeopusenifile is a confirmed malicious PyPI package (MAL-2026-18300) that steals credentials and exfiltrates sensitive data (malicious version 0.1.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in claudeopusenifile (PyPI)

MAL-2026-18300

Immediate action

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

pip uninstall claudeopusenifile

What this malware does

During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-09-donutautosellsrc

Reasons (based on the campaign):

infostealer
Downloads and executes a remote executable.
obfuscation
The package contains code to detect if it is running in a sandbox environment.
malware
native-extension
steganography
c2-in-blockchain

Malicious versions

1 flagged

0.1.3

Indicators of compromise (SHA-256)

051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for claudeopusenifile (version 0.1.3).
If you installed it — respond
claudeopusenifile 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 claudeopusenifile 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. claudeopusenifile on PyPI has been identified as a malicious package (version 0.1.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-09-donutautosellsrc

References

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks claudeopusenifile-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