chimera-sandbox-extensionsPyPI
Advisory published Updated
chimera-sandbox-extensions is a confirmed malicious PyPI package (MAL-2025-191701) that steals credentials and exfiltrates sensitive data (malicious version 0.1.42). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in chimera-sandbox-extensions (PyPI)
What this malware does
When started, the code attempts to access multiple domains based on the generating algorithm. Once one valid is found, it downloads a script and executes it. The script collects data about the environment (e.g. attempts to get cloud tokens from the metadata URLs, collects some env variables) and sends them further to the remote target, which then decides about next stage code.
It may be targetting https://engineering.grab.com/chimera-sandbox
Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2025-06-chimera-sandbox-extensions
Reasons (based on the campaign):
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The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.
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Downloads and executes a remote malicious script.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Credential / info stealerFind it
Search your lockfiles and build artifacts for chimera-sandbox-extensions (version 0.1.42).
If you installed it — respond
chimera-sandbox-extensions 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 chimera-sandbox-extensions 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)
Detect & block this
O3 blocks chimera-sandbox-extensions-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.