NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
Malicious package

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)

MAL-2026-19247
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall testing1345

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):

  • Downloads and executes a remote malicious script.

  • The package overrides the install command in setup.py to execute malicious code during installation.

  • rat

Malicious versions

1 flagged
0.1.0

Indicators of compromise (SHA-256)

15bab830cd8343859ac220ef87e821719169a4e2ccb50da37032d97ef02c27dd
48d6feb6315919cb99e4b19a9f8342a8fd929affcb24f6e46b7c53224534461a

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for testing1345 (version 0.1.0).

  2. 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.

  3. 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

No. testing1345 on PyPI has been identified as a malicious package (version 0.1.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-11-testing1345

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.

Explore

testing1345 (PyPI) malicious package — MAL-2026-19247 | O3 Security