The answer Zonealarm.com would give to that question is "Facebook." The infographic found at that link says that Facebook intercepts 600,000 attempts at login hijackings per day.
It also says 20% of Facebook users have been exposed to malware. Although, being exposed to one and downloading one would seem to be two different things. My public email address gets emails with attachments that look very suspicious, but they don't get downloaded. So it's conceivable that the 20% exposure rate doesn't equal the infection rate. People have gotten a lot smarter about clicking suspicious links.
But when the viruses do get attached, the result doesn't look very pretty. Businessinsider.com describes some of the things they can do, installing key-loggers to steal passwords, for example.
Something that should probably worry all of us in the free world is the possibility that some enemy nation has figured out how to infect our computers with their own special virus. If it has not yet been discovered by the anti-virus companies then their protection programs would be useless against it. Then one day someone pushes a button, all of our computers become zombie participants in DDoS attacks, and the internet shuts down.
It's a cyber-jungle out there.
Users must know how to detect computer viruses in order to elude being infected. This is a problem that regular users should also know. I hope you can write a more detailed information on this.
Posted by: Ballistic | January 26, 2012 at 11:23 PM