Vishing is the fraudulent practice of making phone calls or leaving voice messages pretending to be from reputable companies in order to have individuals give out personal information, up to and including banking or credit card numbers. This is similar to phishing, but vishing is conducted over the phone instead of email. In recent years, vishing has been combined with website hacks that display a virus warning from “Microsoft” and ask you to call the Microsoft Support line to remove the virus immediately or suffer DIRE consequences. This combined attack preys on the elderly and less computer savvy individuals and has cost consumers millions of dollars.
Source: Oxford Dictionary