How does it work?
Anti-Phishing software databases are updated regularly as users computers receive data about new phishing threats, on average, every 20 minutes.
They also compare URLs against a database containing known phishing sites. If a match is found, connection to the infected URL is disconnected and a warning message from your AV suite will be displayed to warn you about the threat.
What to do if i am targeted because i didn't buy Antivirus Software?
Change all of your passwords to a complex password. To your bank, your antivirus provider, social media and email and more importantly the password to your PC. write these passwords down with a pad and pen so the hacker cannot access them. A good password example: GcdLkQwZjMR55MkW - write something similar down or create a phrase using the first letter of a word.
Run a full system scan for other viruses on your PC
Contact your bank to report that there has been fraud performed on your account and they temporarily lock or cancel your card/s.
File a complaint with the appropriate anti-fraud burea:
USA: Federal Trade Commission (FTC)
Canada: Canadian Anti Fraud Centre
UK: National Fraud and Cyber Crime Reporting Centre