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What types of computer viruses are there?
There are many types of viruses and each of them performs a different function. Some are used by attackers to encrypt data, while others are used to remotely control or steal a login and password.
Experts classify viruses into 5 types:
Vinlokers. These types of viruses interfere with the operation of the operating system and seek to make money. Most of them are deleted using safe mode (safe mode) or command line (command line) mode. While this type of attack is less serious, it can sometimes turn out to be the founder of more serious threats, such as encryption (encryption);
Cryptors. They are designed to encrypt all the data on the computer and sell the decryption key for money. Typically, the fee for a private key in decryption is $ 500-1000. PCs, which are often used at work and with personal files, are a more interesting prey for fraudsters. If you look at the FQB statistics for 2015, it is clear that about 1,5 million computers have been compromised by cryptocurrencies. About 15% of these made a payment to restore the data to its original state. That's $ 112 million at minimum cost. Getting rid of a good crypto is also hard in itself.
Trojans. These are software that can access and manage a personal computer. They are divided into RATniks (rats), stylists, and keyloggers;
Stillers and keyloggers. These viruses are designed to steal and read user passwords. In addition, they are able to "disarm" the antivirus installed on the computer. Therefore, passwords should not be stored in the browser, as they can be easily stolen.
Network worms. These types of viruses spread on local networks.
We usually look at antiviruses as a means of protection against viruses. Antiviruses work on the basis of two main algorithms - structural (behavioral) and behavioral (behavioral) analysis. Structural verification can be protected using a cryptor. Behavior analysis can be bypassed by writing the functions correctly.
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