The npm package kl-b2c-ui-kit versions 99.0.1, 99.0.2, and 99.0.4 contain malicious code that executes commands associated with malicious behavior. Installation or execution of this package can lead to full compromise of the affected computer. Removal of the package alone may not fully remediate the infection, and all secrets and keys on the compromised system should be rotated from a different, clean machine.