Thoroughly understand the trojan principle and put it in the cradle

Many new users do not know much about security issues, so they do not know how to clear trojans on their computers. Therefore, the most important thing is to know the working principle of the "Trojan", so that it is easy to find the "Trojan ".

The trojan program tries its best to hide itself. The main ways are to hide itself in the taskbar. This is the most basic thing if you set the Visible attribute of Form to False and ShowInTaskBar to False, when the program runs, it will not appear in the taskbar. Stealth in Task Manager: setting a program as a "system service" can easily disguise itself.

Of course, it will also start quietly, and you certainly won't expect the user to click the "Trojan" icon after each startup to run the server ,, the trojan will automatically load the server every time the user starts, and the method for automatically loading the application when the Windows system starts. The trojan will be used, such as the Startup Group and win. ini, system. ini, registry, and so on are all good places for Trojans to hide. The following describes how a trojan is automatically loaded.

In the win. ini file, under [WINDOWS], "run =" and "load =" are possible ways to load the "Trojan" program. You must pay attention to them carefully. Generally, there is nothing behind their equal signs. If you find that there are paths and file names behind them that are not familiar with the Startup File, your computer may be "Trojan. Of course, you have to see clearly, because many "Trojans", such as "AOL trojantrojan horse", pretend to be a command.exe file. If you do not pay attention, you may not find that it is not a real system startup file.

In the system. ini file, there is a "shell = file name" under [BOOT ". The specified file name should be "assumer.exefolder. If it is not" assumer.exe "but" shell = assumer.exe program name ", the program that follows is a" Trojan "program, that is, you are already in the" Trojan.

The situation in the registry is the most complex. Open the Registry Editor using the regedit command, and click the "HKEY-LOCAL-MACHINESoftwareMicrosoftWindowsCurrentVersionRun" directory, check whether there is an unfamiliar Automatic startup file in the key value. The extension is EXE.

Here, remember: Some "Trojan" programs generate files much like the system's own files. They want to pass through disguise, such as "Acid Battery v1.0 Trojan ", it changes the Explorer key value in the Registry "HKEY-LOCAL-MACHINESOFTWAREMicrosoftWindowsCurrentVersionRun" to Explorer = "C: WINDOWSexpiorer.exe ", there is only a difference between the trojan program and the real Explorer between "I" and "l.
Of course, there are many other places in the registry where the "Trojan" program can be hidden, such: "HKEY-CURRENT-USERSoftwareMicrosoftWindowsCurrentVersionRun", "HKEY-USERS *** \ SoftwareMicrosoftWindowsCurrentVersionRun" directory are all possible, the best way is to find the name of the Trojan program under "HKEY-LOCAL-MACHINESoftwareMicrosoftWindowsCurrentVersionRun", and then search the entire registry.

Knowing how a trojan works, it is easy to scan and kill a trojan. If a trojan exists, the safest and most effective method is to immediately disconnect the computer from the network and prevent hackers from attacking you through the network.

Edit win. INI file. Under [WINDOWS], change "run =" Trojan "program" or "load =" Trojan "program" to "run =" and "load =". Edit system. in the INI file, change "shell = 'Trojan 'file" under [BOOT] To mongoshell‑policer.exe ". In the registry, use regedit to edit the registry, find the file name of the Trojan program under "HKEY-LOCAL-MACHINESoftwareMicrosoftWindowsCurrentVersionRun", search for and replace the "Trojan" program in the entire registry.

Sometimes it is worth noting that some "Trojan" programs do not directly Delete the "Trojan" key value under "HKEY-LOCAL-MACHINESoftwareMicrosoftWindowsCurrentVersionRun, because some "Trojans" such as BladeRunner "Trojans" are automatically added immediately if you delete them. What you need is to write down the name and directory of the "Trojan, then return to the MS-DOS, find the trojan and delete it.

Restart the computer and then delete the key values of all trojan files in the registry. So far, we have achieved success.

TIPS:

A Trojan originally refers to the story of an ancient Greek soldier hiding in a trojan entering an enemy city to occupy an enemy city. On the Internet, a "Trojan Horse" refers to an application or game that some programmers can Download from the Internet, including programs that can control users' computer systems, it may cause damage or even paralysis of the user's system.