If this package is installed
Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.
Details
Source: kam193 (d361ffcded0fc3d88b5095d800b13b3f8a07a581e8003c30bfcf9887eb71243f)
The package is a new version of the previously removed libhmac. The key parts, a malicious payload to inject into hijacked browser extensions, is not included in the package. The code allows hijacking browser extensions to - based on previous package - exfiltrate credentials. This package also contains code to create hidden SSH access to the machine with hardcoded credentials.
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Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.
Campaign: 2026-05-libhmac
Reasons (based on the campaign):
- crypto-related
- exfiltration-credentials
- exfiltration-crypto
- exfiltration-browser-data