What are dialer viruses?

Dialer viruses are malicious software programs that manipulate a computer's modem to make expensive phone calls without the user's consent. Typically, they redirect the modem to premium-rate numbers, leading to significant charges on the victim's phone bill. These viruses often spread through deceptive downloads or emails, and they exploit vulnerabilities in the operating system. Users can mitigate the risk by keeping their software updated and using reliable security solutions.