You find a flash drive in the parking lot entitled "Payroll". You are curious about what the CEO earns, so you plug the device into your system and open a file. Suddenly, your screen flashes and a message appears saying you need to pay 500 Bitcoin in the next 24 hours to unlock the system and regain access to the files. What type of attack were you just victimized by?
Phishing
Skimming
Wi-Fi hacking
Ransomware