A persistent background process where, if you delete the app, a small text file appears on your desktop a few minutes later saying, "I'm still here." Feature Concept 2: Behavioral Analysis (Cybersecurity)

If this is for a creative project, the file could "stalk" the user by reflecting their own data back at them in an unsettling way:

Check if the file requests Administrator Privileges to record screens or log keystrokes.

A UI feature that mimics a hacker's terminal, displaying "live" (simulated) stats like your current IP, local weather, or most recently opened app to create a sense of being watched.

If you are investigating the file's behavior for security reasons, you would look for features commonly found in or Trojans :

Feature Concept 1: The "Digital Footprint Mirror" (Fictional/Game)

Look for "features" that allow the file to hide itself from the task manager or automatically restart upon reboot.