A device may obtain user activity data associated with a plurality of processes being run by the device, where the user activity data identifies user interactions with one or more user input devices, where the plurality of processes is associated with a plurality of process identifiers, and where the user activity data is associated with the plurality of process identifiers. The device may detect an attempt, initiated by a first process having a first process identifier, to access a data file of a file system, and may compare the first process identifier and the plurality of process identifiers to determine whether the first process is associated with a first user interaction included in the user activity data, and may selectively grant the first process access to the data file based on determining whether the first process is associated with the first user interaction.