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Malicious package

littelbitx0PyPI

Advisory published Updated

littelbitx0 is a confirmed malicious PyPI package (MAL-2025-42) that steals credentials and exfiltrates sensitive data (malicious version 1.1.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in littelbitx0 (PyPI)

MAL-2025-42
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall littelbitx0

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 'littelbitx0' @ 1.1.0 (pypi) as malicious.

It is considered malicious because:

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

Malicious versions

1 flagged
1.1.0

Indicators of compromise (SHA-256)

ee67391763ebd7c109cabbd8b6e3f144a97ee89a4bd2e9d4738b65a542d924d3
12e18f11413ae4eb2f6e1de55ae6323adc98666acbcb5c4a4ee203f1a8777275
df4d01291bca9ae78e4a70eabaeb7b2729c75ae5a470c4366215657aa9354e2d
1a183d860d42cc6b2c3f91f32d58a568f0ac7e164521c06a2fd335aadc62c045

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for littelbitx0 (version 1.1.0).

  2. If you installed it — respond

    littelbitx0 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 littelbitx0 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. littelbitx0 on PyPI has been identified as a malicious package (version 1.1.0 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 littelbitx0-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

littelbitx0 (PyPI) malicious package — MAL-2025-42 | O3 Security