A computer security process monitor detects security intrusions of a networked computing platform by monitoring execution statistics associated with one or more computer processes executed by the platform in relation to expected (or “valid”) execution parameters. The execution statistics in one example include system process statistics (e.g., process name, peak memory usage, maximum number of threads, peak CPU utilization) and network interface statistics (e.g., IP ports, protocols) associated with the one or more computer processes; and the valid execution parameters define acceptable values or states corresponding to the execution statistics.