Viruses can have many different names or 'types' and can do many different things. A 'Stealer' will steal your saved browser passwords, a 'Trojan' will give a hacker access to all of your personal files and a 'Worm' will embed itself into your system to connect to a network of hacked computers (Usually to perform DDoS attacks).
There are several virus that steals passwords. A key logger is a good example. Key logger can trace all the letters that has been typed by a user and send it to a host server or email. Another example is the heart bleed virus. Whenever you type anything on the internet (expecially passwords), it is stored in a virtual code commonly called "cookies", heart bleed will search and trace for any password cookies.
These are Trojans, i.e. programs that pretend being legitimate programs, but in fact are malicious.
It is not a single program, but category of programs.
Trojan Horses and RAT's (Remote Administration Tools).
Trojan
Trojan horse
Trojan
These are Trojans, i.e. programs that pretend being legitimate programs, but in fact are malicious. It is not a single program, but category of programs.
No known viruses destroy data, though many block it.
software safeguard means to protect data by applying passwords or install anti virus programme so taht data cant be lost by virsuses
the effect of having a virus on your computer depends on which virus you have. some view your personal data like credit cards and stuff. some destroy your computer so it wouldn't work anymore and you would have to reinstall windows and all your data could be lost.
The payload is what the computer virus is programmed to do. Some viruses do nothing more than copy themselves onto another PC, much like a real virus does from host to host. This is the simplest payload that a virus can have. However, just like viruses in nature, some computer viruses have a greater effect - maybe they steal files or data or allow someone else to take control over the PC while some will destroy some or all of the data on the computer. A virus can also have multiple payloads (in fact, any virus that does more than just spread has by default more than one payload) - perhaps it steals data and waits until some date in the future when it activates a new payload and deletes all the data on the drive or something similar.
They sometimes destroy data of some companys , so they can earn money , and there are alot of other reasons , sometimes to spy .... but the sure thing that no one will do this for No reason !
A Virus Mabezat is a worm that spreads through email, removable drives and network shares protected by weak passwords. It also infects executable files and encrypts data files. http://antivirusworld.com/articles/virus/mabezat.php
The name it's given is called a Trojan virus taken from the Trojan war with worriors inside a giant wooden horse that was a given as a gift.
Trojans are pieces of malware that are downloaded by the user because they believe it is a useful program, but cause harm instead.
A virus may destroy all data stored in the hard disk by either formatting it without warning or by destroying some of its sectors.A virus may change the boot sector of the hard disk. If the boot sector of a disk is affected, it cannot boot the computer.The computer viruses are automatically loaded into the main memory of the computer and remain in the memory. This slows down the data accessing speed of the computer.A virus can destroy BIOS of the computer.