Virus, Trojan, Worms, Spyware, Adware And Malware
All these categories operate without the knowledge of the system owner. Their intention is to destroy and steal the system data. Some times the latest Anitvirus software will not be able to detect and resolve the situation. The whole machine working gets affected. Loss of time and data are much huge in such situations.
Virus (Vital Information Resources Under Siege)
Virus is a program written smartly to replicate on the network and destroy the host computers. If any machine is affected with virus, removal of the virus will be a head ache for us. It would spread through emails, pictures, file sharing etc.
Trojan’s are the programs which used to gain access to the host computer. The trojan infected machine open path to the attackers to stole the data. Backdoor of the affected systems are used for attacks like DDOS attacks etc..
The basic difference between a computer virus and a computer worm is that a virus requires a program(host program) to run and replicate where as a computer worm can spread without a host program. But analysis shows that modern computer worms uses files to hide inside.
In short computer worm is a self replicating program which uses a network to send copies of itself to all the hosts in the network even without user intervention.
Spyware is a malware that is secretly installed on the users computer and collects information about the users without their knowledge. A typical example is keylogger installed on the computers to secretly monitor the users.
Other than monitoring the users computing, spyware programs collect various information such as Internet surfing habits, sites visted and may ven interfer with user control of the computer. They may install additional software’s secretly and may redirect the webpages.
Adware are the programs which bring much ads to our computer. If the infect machine connected to Internet, at sudden so many POP-UP’s will be opening with ads. By closing one ads window another one will be opening. They consume much bandwidth.
Malwares are the program with malicious intention. They are the general term used for bad-software . Viruses, Trojans, Spams, Adware, Spyware etc. fall under the malware category. Their intention is to create backdoor entry to the attackers, steal data and prepare the host computer for attacking another systems.
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