Security threat detection associated with security events and an actor category model

A threat detection system comprising:

• a non-transitory data storage that stores security events associated with network devices, and an actor category model including a plurality of levels arranged in a hierarchy and each level is associated with a subcategory for a category of the actor category model, wherein the actor category model comprises an attribute for users, and the actor category model comprises parent-child relationships between the plurality of levels, and child levels inherit rules from their parent levels;
• and
• at least one physical processor that correlates security events with the actor category model, wherein to correlate the security events the at least one processor:
• identifies a user for each security event;
• determines the actor category model is applicable to the user for each security event and any of the security events associated with the user by matching the attribute for users in the actor category model with a user attribute of the user in a user data model;
• identifies a level in the actor category model associated with the user for each security event;
• and
• determines whether a security threat exists based on the correlating, wherein to determine whether the security threat exists, the at least one processor:
• determines a security rule for the identified level;
• and
• applies the security rule to determine whether the security threat exists.

The A non-transitory computer readable medium storing machine readable instructions that when executed by a physical processor cause the physical processor to:

• store security events associated with network devices;
• store an actor category model including a plurality of levels arranged in a hierarchy and each level is associated with a subcategory for a category of the model;
• correlate security events with the actor category model, wherein to correlate the security events the at least one processor is to identify a user for each security event, determine the actor category model is applicable to the user for each security event and any of the security events associated with the user by matching the attribute for users in the actor category model with a user attribute of the user in a user data model, and identify a level in the actor category model associated with the user for each security event, wherein to identify the user for each security event, the processor determines an application associated with the security event, identifies an authenticator that provisions user accounts for the application, determines an account ID associated with the security event, and determines the user based on the authenticator and the account ID;
• and
• determines whether the security threat exists based on the correlating, wherein to determine whether the security threat exists, the at least one processor is to select a security rule for the identified level from a plurality of security rules, and determine whether the security threat exists by applying the selected security rule.