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Part of a larger attack: 2025-08-k7eel published 31 malicious packages. See the full campaign →
Malicious package

woowoowoPyPI

Advisory published Updated

woowoowo is a confirmed malicious PyPI package (MAL-2025-47812) that steals credentials and exfiltrates sensitive data (malicious version 0.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in woowoowo (PyPI)

MAL-2025-47812
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
pip uninstall woowoowo

What this malware does

Importing the module downloads and executes widely recognized malware

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2025-08-k7eel

Reasons (based on the campaign):

  • Downloads and executes a remote executable.

  • malware

Malicious versions

1 flagged
0.1.1

Indicators of compromise (SHA-256)

cf32bd08425b38b3c020fe1d1c6455ff4deb8133aed454672550053bab59ec54
fe636f09ef4bc2cbd8396a8c3038896728b867d91d36802e2e3d8da8fd0228b6
68c093297f2648c1f7fbdccd35b7191bf273b78dbcefdae24c26a9739cfad086
28b972fa3b1e97013a93d57170410da45e3fd0e8a4dc1429cab3891f53c804f9

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for woowoowo (version 0.1.1).

  2. If you installed it — respond

    woowoowo 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 woowoowo 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. woowoowo on PyPI has been identified as a malicious package (version 0.1.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-048222025-08-k7eelRLUA-2026-00934

References

Credits

  • Kamil Mańkowski (kam193)
  • ReversingLabs · finder

Detect & block this

O3 blocks woowoowo-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

woowoowo (PyPI) malicious package — MAL-2025-47812 | O3 Security