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Malicious package

masirkhanPyPI

Advisory published Updated

masirkhan is a confirmed malicious PyPI package (MAL-2025-944) that steals credentials and exfiltrates sensitive data (malicious version 0.1.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in masirkhan (PyPI)

MAL-2025-944
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall masirkhan

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.

Malicious versions

1 flagged
0.1.9

Indicators of compromise (SHA-256)

7006e38cfbab1a8bdd4902db6b512d9456dfb9bafd8ba415523a358de81a9bcb
2ee1fb6de5a50d4822e4bbef6900c134a0174abc305eab46305ed777158fb5f1
b67e1d0a9f54f2ca44aa61ecdf60d0caaff8fa29810b95066efc78a5fd4de6d9
3bbd6907e35723bb0b53ea7b799dc1cdad3cd8f45190753c5395f1c14a107610
c9e1324f2687bca43cc3ffa9984bed7948e42d9a29dfe6a0b447c30e1ac65b17

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for masirkhan (version 0.1.9).

  2. If you installed it — respond

    masirkhan 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 masirkhan 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. masirkhan on PyPI has been identified as a malicious package (version 0.1.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-00484GENERIC-standard-pypi-install-pentestRLUA-2026-00498

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

O3 blocks masirkhan-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

masirkhan (PyPI) malicious package — MAL-2025-944 | O3 Security