The Small Malware-ABC

The Small Malware-ABC - Any PC user enters contact with computer programs, which are aimed only to spy on a system data, or even destroy, sooner or later. Such malicious software is called malware. The term is composed of malicous = harmful and software. The most popular types of malware include viruses, worms, Trojans and spyware. But include also scareware or rootkits.

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What is a computer virus?
A computer virus is spreading from PC to PC by he infects files or disks with its program code. In contrast to a worm it needs the assistance of the computer user's always a virus becomes active. There are different types of computer viruses:

File or link virus infested executable program files, for example with the file name extension ". exe", ".com" or ".scr" are marked. Almost all components of Windows and installed programs are affected. This virus species writes its code in the respective file. As soon as the user starts the file, the virus runs automatically.

Boot viruses infect disk and spread primarily via USB sticks or used floppy disks. You nest in the boot sector of the hard drive, so in the area, saying the storage medium is how big and how the computer should be restarted. At every boot, the virus becomes active, affects other sectors, or infected connected storage media. Because modern PCs starting notice changes the boot sector, this kind of virus today not more often is.

Macro viruses hide themselves not in programs, but in Word or Excel documents. Macros are written in an Office's own programming language; first of all, to automate workflows. When the infected document, the virus automatically begins its damage routine. These range from simple jokes, such as about hiding menu items, to deleting files. In addition, that some varieties are active only on a specific day, or after a certain number of starts (System tool removal: remove annoying malware from your PC).

What is a computer worm?
Worms spread automatically within a network, without files directly to infected and practically without user intervention. They whiz preferably as an email attachment criss -cross through the Internet, where they can find optimal conditions. At best, your objective in their endless propagation and the allocation of storage resources – reduces the computing power of infected PCs. worms in the past already whole networks shut. Also, there are many worms, the code for which was combined with the properties of PC viruses. Some have even Trojans as malicious cargo on board.

What is a Trojan?
Trojans, better Trojan horse, referred to a seemingly harmless program with a concealed damage function: a virus, worm, or spyware. The purpose of most Trojan horses is to install malicious programs on the PC, that spying unnoticed sensitive data such as passwords for Internet banking or mail accounts, credit card numbers and the like and submit. So-called Backdoor Trojans are a particularly dangerous form of the Trojan horse. This involves assistance programmes, through which a hacker on foreign computers can access.

What is a spyware?
Spyware refers to programs that spy on information about PC users like about personal data and surfing habits and transmit them over the Internet. The backers can learn such preferences of the surfers and deliver targeted advertising on the PC. Spyware vendors lure often with beautiful screen savers or other attractive free programs, where they hide their malicious software. Increasingly spreading spyware also on Trojan horses and worms.

What is a hoax?
Hoax in itself means "bad joke", and is widely used on the Internet for a hoax. Such messages usually to the request to forward the message to friends and acquaintances are added. Hoaxes are no malware in the strict sense, because usually they pursue any criminal intentions. However, such "apparent viruses" can be dangerous. Some of these hoaxes for example require the PC user to delete certain and some important system files. Some hoaxes haunt for many years through the Internet. One of the most famous is the Budweiser hoax, which warns of an alleged virus in a screen saver of the brewery.

What is adware?
Adware is free software offerings and apps that show advertising the user on his device. The programs do typically no bones about it, what is their intention and bit

What is a keylogger?

A keylogger is used to record the user keypad. Online criminals use keylogger to access the user's personal data such as passwords "from the fingers".

What is scareware?

Scareware (English scare = scare) serves to confuse computer users and to lead it to install a software. Usually it's professionally made programs that pretend to test your PC for malware infections, hacker attacks or system problems. The computer user enters it, he gets along with the prompt to install that supposedly detected viruses or system problems eliminated a program a comprehensive and frightening bug report - then. Indeed scareware runs no tests, the alleged attack is already established. The backers sell on this way useless software or spread themselves more malware.

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