logger-libsPyPI
Advisory published Updated
logger-libs is a confirmed malicious PyPI package (MAL-2026-18778) that steals credentials and exfiltrates sensitive data (malicious versions 0.4.1, 0.4.2, 0.4.3…). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in logger-libs (PyPI)
What this malware does
In this new incarnation of the campaign, the payload is spread between multiple files and reconstructed in runtime. It then downloads and executes malicious code from a remote location.
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-11-spellcheckers
Reasons (based on the campaign):
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obfuscation
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Downloads and executes a remote malicious script.
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The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for logger-libs (5 malicious versions).
If you installed it — respond
logger-libs 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 logger-libs 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
Campaign
References
Credits
- Kamil Mańkowski (kam193) · reporter
Detect & block this
O3 blocks logger-libs-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.