A security monitoring system operated by a downstream client continually collects event information indicating events that have occurred within the computing environment of the downstream client. The monitoring system, using software provided by a threat analytics system, aggregates the event information into a secure and space efficient data structure. The monitoring system transmits the data structures storing event information to the threat analytics system for further processing. The threat analytics system also receives threat indicators from intelligence feed data sources. The threat analytics system compares the event information received from each security monitoring system against the threat indicators collected from the intelligence feed data sources to identify red flag events. The threat analytics system processes the event information to synthesize all information related to the red flag event and reports the red flag event to the downstream client.