A computer implemented method of monitoring a collector computer system includes receiving machine interpretable code that is configured for interpretation by the interpreter that includes: information identifying a first set of one or more monitoring targets within the collector computer system, a method for monitoring the first set of one or more monitoring targets, and predefined reporting criteria. The method also includes interpreting the machine interpretable code with an interpreter; monitoring at least a subset of the first set of one or more monitoring targets for candidate activity that satisfies the predefined reporting criteria by executing compiled instructions that correspond to the method for monitoring the first set of one or more monitoring targets; obtaining candidate event information that is associated with the candidate activity; and reporting the candidate event information to a computer system that is distinct from the collector computer system.