MALWARE and its types (computer virus -part 1)

What is Malware?

Malware, derived from the words malicious and software, is software designed toinfiltrate or damage a computer system without the owner's informed consent. The expression is a general term used by computer professionals to mean a variety of forms of hostile, intrusive, or annoying software or program code. The term "computer virus" is sometimes used as a catchall phrase to include all types of malware, including true viruses.

Types of Malware

           1. Virus
           2. Worm
           3. Trojan
           4. Root Kit
           5. Spyware

1. VIRUS
The term virus(vital information resource under size) is used for a program written by a computer programmer which has infected some executable software and which causes that software, when run, to spread the virus to other executable software. Viruses may also contain a payload which performs other actions, often malicious.

The purpose of virus :

Virus writers need bandwidth, CPU control, data and remote access . Basic virus purpose is to only destroy the data

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2. WORM

Worm is also a virus but automatically transmits itself over a network to infect other computers. It too may carry a payload. Worm is more powerful and harmful and worm automatically infects system softwares.

Main purpose to write worm is to use bandwidth and CPU and hang network services.

3. TROJAN

Trojan horse is also a type of virus which is used to control remote machine without system owner knowledge. Trojan has two parts : 1. server 2. client , Server handles all infected remote computers' connections and client is used to infect victim computer system. Every Trojan has its associated port number for communication over internet or LAN.

in previous post we had seen these trojan attack who it configured .

4. ROOTKIT

Root kit is also a virus like Trojan for remote access of any system. Root kit is very powerful as compared to Trojan because root kit implements on kernel level of any operating system, which is hard to detect and delete.

Root kit is invisible in taskmanager as it hides itself.

5. SPYWARE

Spyware is computer software that is installed surreptitiously on a personal computer to collect information about a user, their computer or browsing habits without the user's informed consent.While the term spyware suggests software that secretly monitors the user's behavior, the functions of spyware extend well beyond simple monitoring. Spyware programs can collect various types of personal information, such as Internet surfing habits and sites that have been visited, but can also interfere with user control of the computer in other ways, such as installing additional software and redirecting Web browser activity.

in this post, we have seen what is malware and what are the types and basic introduction of every type in next article we will have look in a deep manner, how exactly these malwares are programmed , and how they configured in a remote machine etc..

figure: USAGE OF MALWARE OVER THE NETWORK

  In the figure we can figure out  that TROJAN HORSE attack major attack among the MALWARE  types 

for more details about trojan horse attack  troja attack part 1

note:

the posts (articles) in this blog written for education purpose only  , do not try to hack the network , its highly secure moreover its monitoring on daily basis ,if any case , the author of this blog is not responsible , this blog completely education purpose only