1. A computer-implemented method for protecting electronic content from unauthorized use performed by a computer system comprising a processor and a non-transitory computer-readable storage medium storing executable instructions that cause the processor to perform the method, the method comprising: receiving a request to process electronic content using a software module executing on the computer system; accessing a control policy associated with the electronic content; determining that the software module exhibits one or more predefined behaviors specified in the control policy, wherein determining that the software module exhibits one or more predefined behaviors comprises detecting an attempt by the software module to access one or more system interfaces that are not included in a list of predefined legitimate system interfaces; and implementing at least one action to protect the electronic content from unauthorized use based on the determination, wherein the at least one action comprises modifying at least a portion of the electronic content before it is processed by the software module.