O'Reilly logo

CompTIA Security+ Certification Guide by Ian Neil

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Virus and malware attacks

In today's world, viruses and malware and rife; there are many different variants and we will look at each of these in turn:

  • Virus: A virus is a program that embeds itself into a program and is executed in many different ways, for example by clicking on a link on a web page or opening up an email attachment. Once it has been activated, it replicates itself, going from host to host. A lot of viruses use port 1900.
  • Ransomware: Ransomware is when the attacker encrypts the files on a user's computer and then a link comes up asking for money to release the files. An example of this is shown in the following screenshot. Ransomware could also be when you download a free program and it says that you have problems with your ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required