It often includes a pre-built list of keys that may have worked in the past. User Interface:

Using pirated keys violates the End User License Agreement (EULA) , which can lead to legal issues for businesses or permanent account bans. Legitimate Ways to Manage or Find Your ESET Keys

This refers to a type of software (often a crack or keygen) that claims to scan online servers, forums, or generate algorithms to produce valid ESET license keys (usernames and passwords). These are not official ESET utilities.