testing1345PyPI
Advisory published Updated
testing1345 is a confirmed malicious PyPI package (MAL-2026-19247) that steals credentials and exfiltrates sensitive data (malicious version 0.1.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in testing1345 (PyPI)
What this malware does
During installation, the package downloads and executes a script from a remote location. The server delivers different payload versions, some of them being benign, and others containing next-stage installation. The final payload is a RAT.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-11-testing1345
Reasons (based on the campaign):
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Downloads and executes a remote malicious script.
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The package overrides the install command in setup.py to execute malicious code during installation.
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rat
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for testing1345 (version 0.1.0).
If you installed it — respond
testing1345 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 testing1345 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
Campaign
References
Credits
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks testing1345-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.