In an aspect of the invention, the method includes one or more processors identifying events in the target environment that are associated with an indication of a security attack on the target environment. The method further includes composing rules based on the events and relating to an entity identifier that is fixed over a period of time in relation to an entity in the target environment. The method further includes weighting the rules according to a probability that the rule positively identifies a security attack. The method further correlating outputs of multiple activated rules relating to an entity identifier that are activated over time in response to events occurring in the target environment. The method further includes aggregating weightings from the multiple activated rules. The method further includes determining a score for an entity relating to the entity identifier based on the aggregated weightings.