Which versions of ufish are malicious?

The following PyPI versions of ufish are flagged malicious: 0.1.2, 0.1.3. Treat any of these as compromised.

How do I remediate ufish if I installed it?

Remove ufish from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is ufish part of a known attack campaign?

Yes — ufish is associated with the 2026-06-compr-woodpecker campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect ufish in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking ufish and packages like it before any post-install script runs.

Malicious package

ufishPyPI

Malicious code in ufish (PyPI) Remove it immediately and rotate any exposed credentials.

MAL-2026-5285

Immediate action

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

pip uninstall ufish

What this malware does

Versions 0.1.2, 0.1.3 were compromised.

Compromised packages start an obfuscated infostealer. The infostealer is a heavily obfuscated JavaScript code executed using Bun runtime on Python startup. It collectes all kinds of sensitive data, including API keys, credentials to package repositories, cryptocurrency assets, password manager data. Infostealer actively queries online services to collect additional secrets as well as attempts to gain persistence and spread further by publishing infected packages using collected credentials. Data are exfiltrated likely using Github. The code seems to threaten to wipe the user's data if it detects invalid GitHub tokens. Cleanup should be done with caution.

It seems to be related to the recent Mini Shai Hulud campaign.

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

Campaign: 2026-06-compr-woodpecker

Reasons (based on the campaign):

compromised-package
exfiltration-env-variables
exfiltration-cloud-tokens
exfiltration-credentials
abuses-pth
obfuscation
infostealer
The package contains code to detect if it is running in a sandbox environment.
exfiltration-crypto
files-exfiltration
destructive-actions

Malicious versions

2 flagged

0.1.20.1.3

Indicators of compromise (SHA-256)

27371fa53e0e8e5e763b18b9bcadfd9b6991c720dd154d17bffeab0e7a139ef4

363de38445789a68c39be471548d6cf42a9766a4be5bcd0c193d96c5584fa345

6e8f3920c3720ca1920e933c62083828859549eb1da49e71dc1c6a2cb566f4f0

38c233cb6ec14bd6731fc3aac98ba6c9031e9afe4c0c53d032b605b4acff6e70

Frequently asked questions

No. ufish on PyPI has been identified as a malicious package (versions 0.1.2, 0.1.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

2026-06-compr-woodpecker

References

Credits

Kamil Mańkowski (kam193) · reporter

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection