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Malicious package

testing123kkPyPI

Advisory published Updated

testing123kk is a confirmed malicious PyPI package (MAL-2025-6336) that steals credentials and exfiltrates sensitive data (malicious version 10.0.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in testing123kk (PyPI)

MAL-2025-6336
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall testing123kk

What this malware does

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.

Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

Reasons (based on the campaign):

  • The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

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

The OpenSSF Package Analysis project identified 'testing123kk' @ 10.0.5 (pypi) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

Malicious versions

1 flagged
10.0.5

Indicators of compromise (SHA-256)

4335bf56e5be8695fa87d7678b21eb5080d33a35c0c0f6b0278a4555ae5b1f2a
556a77f1ef1061b46faf9264325f7f0b2893e8d564d575aa6c5db89fef4a73b7
bebd39f4de86af5e9634fbfda5f8c97794b597b1066c2fcd32e3a2068569280d
8f92568e83badb49c4036065b4f64ef5e275844ac0a2872aae57c9f9f9a773b3

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for testing123kk (version 10.0.5).

  2. If you installed it — respond

    testing123kk 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 testing123kk 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. testing123kk on PyPI has been identified as a malicious package (version 10.0.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GENERIC-standard-pypi-install-pentest

References

Credits

  • Kamil Mańkowski (kam193)
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks testing123kk-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

testing123kk (PyPI) malicious package — MAL-2025-6336 | O3 Security