PROCESS RISK CLASSIFICATION

In one implementation, a computer-implemented method includes receiving, at a process risk classifier running on a computer system, a request to determine a risk level for a particular process; accessing one or more signatures that provide one or more snapshots of characteristics of the particular process at one or more previous times; identifying one or more differences between the particular process in its current form and the one or more signatures; accessing information identifying previous usage of the computer system's resources by the particular process; determining a current risk score for the particular process based, at least in part, on (i) the one or more signatures for the particular process, (ii) the one or more differences between the particular process in its current form and the one or more signatures, and (iii) the previous usage of the resources; and providing the current risk score for the particular process.