Protection manual: How to Prevent ASP Trojan Horse running on the server

If your server is being plagued by an ASP Trojan, then hopefully this article will help you solve the problem you are facing.

At present, the most popular ASP Trojan horse mainly through three kinds of technology to carry out the relevant operation of the server.

First, use the FileSystemObject component

FileSystemObject can perform general operations on files

This can be prevented by modifying the registry to rename this component.

Hkey_classes_root\scripting.filesystemobject\
Renamed to other names, such as: Change to Filesystemobject_changename

You can call this component normally using this when you call it later.

Also change the CLSID value

Hkey_classes_root\scripting.filesystemobject\clsid\ the value of the project

It can also be deleted to prevent the harm of such Trojans.

Unregister this component command: regsrv32/u C:\WINNT\SYSTEM\scrrun.dll

Prevents the guest user from using Scrrun.dll to prevent calls to this component.

Use command: cacls c:\winnt\system32\scrrun.dll/e/d Guests

Ii. Use of Wscript.Shell components

Wscript.Shell can invoke the system kernel to run DOS basic commands

This can be prevented by modifying the registry to rename this component.

Hkey_classes_root\wscript.shell\ and Hkey_classes_root\wscript.shell.1\
Change to a different name, such as: Wscript.shell_changename or Wscript.shell.1_changename

You can call this component normally using this when you call it later.

Also change the CLSID value

Hkey_classes_root\wscript.shell\clsid\ the value of the project
Hkey_classes_root\wscript.shell.1\clsid\ the value of the project

It can also be deleted to prevent the harm of such Trojans.

Iii. Use of shell.application components

Shell.Application can invoke the system kernel to run DOS basic commands

This can be prevented by modifying the registry to rename this component.

hkey_classes_root\shell.application\
and hkey_classes_root\shell.application.1\
Change to a different name, such as: Shell.application_changename or Shell.application.1_changename

You can call this component normally using this when you call it later.

Also change the CLSID value

Hkey_classes_root\shell.application\clsid\ the value of the project
Hkey_classes_root\shell.application\clsid\ the value of the project

It can also be deleted to prevent the harm of such Trojans.

Prevents the guest user from using Shell32.dll to prevent calls to this component.

Use command: cacls c:\winnt\system32\shell32.dll/e/d Guests
Note: The operation will not take effect until the Web service is restarted.

Iv. Call Cmd.exe

Disable Guests group user call Cmd.exe
cacls c:\winnt\system32\cmd.exe/e/d Guests

Through the above four steps to set the basic can prevent the current more popular Trojans, but the most effective way or through comprehensive security settings, the server, the security of the program to achieve a certain standard, the security level may be set higher to prevent more illegal intrusion.