Which versions of coolbox are malicious?

The following PyPI versions of coolbox are flagged malicious: 0.4.1, 0.4.2. Treat any of these as compromised.

How do I remediate coolbox if I installed it?

Remove coolbox 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 coolbox part of a known attack campaign?

Yes — coolbox 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 coolbox 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 coolbox and packages like it before any post-install script runs.

Malicious package

coolboxPyPI

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

MAL-2026-5295

Immediate action

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

pip uninstall coolbox

What this malware does

Versions 0.4.1, 0.4.2 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

0.4.10.4.2

Indicators of compromise (SHA-256)

5c2dc2f03691017c67f2ef9805c4974416d935298b4748b033bfb7f487ede251

f0d5fde6bb63a9bdd47ede4cdf19e54d636016848ad9e780a0db4d96138c2d6f

6120318ad0beb72f5fe01fbceb6a2bb29b2c93c277b4a5fe2b5d7f148bcd30d8

da9448cdfb3593bc9434cbc09686ea2d8bc73f5b531e45d13229949e14aadbf8

Frequently asked questions

No. coolbox on PyPI has been identified as a malicious package (versions 0.4.1, 0.4.2 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.

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