A method of normalizing security log data can include receiving one or more security logs including unstructured data from a plurality of devices and reviewing unstructured data of the one or more security logs. The method also can include automatically applying a probabilistic model of one or more engines to identify one or more attributes or features of the unstructured data, and determine whether the identified attributes or features are indicative of identifiable entities, and tagging one or more identifiable entities of the identifiable entities, as well as organizing tagged entities into one or more normalized logs having a readable format with a prescribed schema. In addition, the method can include reviewing the one or more normalized logs for potential security events.