Which versions of kotanku are malicious?

The following PyPI versions of kotanku are flagged malicious: 0.1.0. Treat any of these as compromised.

How do I remediate kotanku if I installed it?

kotanku 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.

I already installed kotanku — how do I know if it already compromised me?

If kotanku 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.

Is kotanku part of a known attack campaign?

Yes — kotanku is associated with the 2026-08-kotanku campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find kotanku across my projects, lockfiles, and CI pipelines?

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

Malicious package

kotankuPyPI

Advisory published Aug 9, 2026Updated Aug 9, 2026

kotanku is a confirmed malicious PyPI package (MAL-2026-13667) 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 kotanku (PyPI)

MAL-2026-13667

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

pip uninstall kotanku

What this malware does

During import, the package exfiltrates cryptocurrency wallet files.

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

Campaign: 2026-08-kotanku

Reasons (based on the campaign):

exfiltration-crypto
uses-telegram-bot

Malicious versions

1 flagged

0.1.0

Indicators of compromise (SHA-256)

2281ff1cf735f26084f13f5f3ef5e1d5f9faf8cf06254532e5ee6d27204f52d1

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for kotanku (version 0.1.0).
If you installed it — respond
kotanku 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.
Did it already run?
If kotanku 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. kotanku 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

2026-08-kotanku

References

bad-packages.kam193.eu

Credits

Kamil Mańkowski (kam193) · reporter

Detect & block this

O3 blocks kotanku-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database