What is Malware
In the recent years, we have heard of many people and big corporates losing their precious data or being in a situation where their systems are hacked. These unwanted activities are being caused, in most of the cases, using a piece of software inserted into a network system, server or a personal computer. This piece of software is known as a malware.
A malware can cause harm to a system or a network directly, or subvert them to be used by others, rather than as intended by their owners. It is a combination of two words: Mal meaning Bad and Ware meaning Software.
Based on www.av-test.org, the statistics are growing tremendously. Please look at the following graph to understand the growth of Malware.
How It Works
To understand how malware works, we should first see the anatomy of a malware attack, which is separated in five steps as shown below −
To understand how malware works, we should first see the anatomy of a malware attack, which is separated in five steps as shown below −
1.Entry point
2.Distribution
3.Exploit
4.Infection
5.Execution
2.Distribution
3.Exploit
4.Infection
5.Execution
Let us understand the above-mentioned points in detail.
Types of Malware
》Virus
Virus is a malware program that acts in an interesting way. This program executes or replicates itself by putting-in some copies of itself in other computer programs, boot sector, data files, hard disk, etc. When the replication process is done, then the areas that are affected are said to be the infected ones.
Viruses are built to perform some of the most harmful activities on the hosts when they are infected. They can steal the CPU time or even the space in the hard disk. They can also corrupt the data and can put some funny messages on the screen of the system.
》Adware
This software is mainly the advertising supporting software. A package that comes automatically with the advertisements inside. Hence, it can generate some good income for the owner.
This software is mainly the advertising supporting software. A package that comes automatically with the advertisements inside. Hence, it can generate some good income for the owner.
》Spyware
Spyware is a software that is mainly used for the gathering of information about some organization or a person. That information is gathered without anyone getting to know that the information is being fathered from his or her system.
Spyware is a software that is mainly used for the gathering of information about some organization or a person. That information is gathered without anyone getting to know that the information is being fathered from his or her system.
》Trojan
Trojan is a non-self-replicating type of malware. It contains some malicious code, which carries out some actions that are determined by the nature of that specific Trojan. This happens upon the execution only. The result of the action is normally the data loss and it can also harm the system in many ways.
Trojan is a non-self-replicating type of malware. It contains some malicious code, which carries out some actions that are determined by the nature of that specific Trojan. This happens upon the execution only. The result of the action is normally the data loss and it can also harm the system in many ways.
》Rootkits
Rootkits are the stealth type of malware. They are designed in some special way that they can actually hide themselves very well and it is quite difficult to detect them in a system. The normal methods of detection do not work on them.
Rootkits are the stealth type of malware. They are designed in some special way that they can actually hide themselves very well and it is quite difficult to detect them in a system. The normal methods of detection do not work on them.
》Botnets
Botnet is a software installed on a computer that is connected through the internet and it can help one communicate with the other same type of programs, so that some actions can be performed. They can be same as keeping control of some IRC, which are Internet Related Charts. In addition, it can be utilized for sending out some spam emails or to participate in some distribution of denial of services attacks.
Botnet is a software installed on a computer that is connected through the internet and it can help one communicate with the other same type of programs, so that some actions can be performed. They can be same as keeping control of some IRC, which are Internet Related Charts. In addition, it can be utilized for sending out some spam emails or to participate in some distribution of denial of services attacks.
》Ransom Ware
Ransom ware is a software that encrypts files, which are on the hard drives. Some of them can even end up with simply showing some message about payment of money to the person, who has implemented this program.
Ransom ware is a software that encrypts files, which are on the hard drives. Some of them can even end up with simply showing some message about payment of money to the person, who has implemented this program.
How to Protect form Malware
We should understand that viruses infect outside machines only with the assistance of a computer user, which can be like clicking a file that comes attached with an email from an unknown person, plugging a USB without scanning, opening unsafe URLs, etc. For such reasons, we as system administrators have to remove the administrator permissions of users in their computers.
♢Some of the most common don’ts for letting malware enter into a system are as follows −
♢Do not open any email attachments coming from unknown people or even from known people that contain suspicious text.
♢Do not accept any invitation from unknown people in social media.
♢Do not open any URL sent by unknown people or known people that are in any weird form.
♢Some other important pointers for keeping your system updated are as follows
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