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 computer so you need to purchase the full version of the software. Remember, this is quite subtle—the rule of thumb is that if you have to part with money, then it is ransomware:

Figure 1: Ransomware

• Crypto-malware: Crypto-malware is a type of ransomware...