Detailed analysis of U disk viruses and Autorun. inf files

A friend who often uses a USB flash drive may have suffered from the USB flash drive virus many times. the USB flash drive virus is a new virus that is mainly spread through the USB flash drive and mobile hard drive. Almost all of these viruses use autorun. inf, but in fact autorun. inf is equivalent to an infectious route. Viruses intruded through this channel are theoretically "any" viruses. Therefore, we can find on the Internet that when autorun. inf is found, the virus that comes with it often has different names, which is exactly the truth. It is as if there is a wound in the body, there may be more than one type of bacteria that may enter, the bacteria that enter in different environments can be different, or even the AIDS virus. This autorun. inf is a startup. Therefore, it is impossible to simply say what the USB flash drive virus is, which leads to confusion in the detection and removal process, because there are more than one or dozens of USB flash drives, the detailed figures should not be counted.

Let's talk about autorun. inf, the so-called startup ......

First, autorun. the inf file exists for a long time. In other windows systems (such as Win98 and 2000) before WinXP, if you need to insert the CD and USB flash disk to the machine for automatic operation, you need to rely on autorun. inf. This file is stored in the root directory of the drive (a hidden system file), which stores some simple commands, tell the system which program should be automatically started for the newly inserted CD or hardware, or tell the system to change its drive letter icon to an icon in a certain path. Therefore, this is a regular and reasonable document and technology.

But I believe you have noticed that "automatic" is the key. Virus writers can use this to allow mobile devices to automatically execute any commands or applications without the knowledge of their systems. Therefore, the autorun. inf files can be placed in normal boot programs, such as the various teaching CDs that we often use, which can be automatically installed or automatically demonstrated as soon as a computer is inserted, place any malicious content.

Computer viruses are the same in the biological world. bacteria, viruses, and humans are both organisms. In most cases, these microorganisms are not completely harmful, it will also coexist with the human body. Like normal programs, viruses in computers are written and executed using the source code with the same basic principles, but the software executes what the user needs and functions normally, the virus executes functions that are not required by the user and are abnormal. Here, there is a dialectical relativity. For example, a friend who is familiar with computers knows that the Format and del doscommands represent formatting the hard disk and deleting files. Suppose I am autorun. if the Format or del command is used in inf, it means that I can Format someone else's machine or delete some files, which does not require too much advanced computer knowledge.

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