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Backdoor:Win32/Morix.B

First posted on 30 March 2015.
Source: Microsoft

Aliases :

There are no other names known for Backdoor:Win32/Morix.B.

Explanation :

Threat behavior

Installation
This threat can create files on your PC, including:

• %ProgramFiles%\%program files%\cest.bat
• %ProgramFiles%\%program files%\laass.exe
• %ProgramFiles%\%program files%\wdcp.dll

It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKLM\system\currentcontrolset\services\appmgmt\parameters
Sets value: "ServiceDll"
With data: "%ProgramFiles%\%program files%\wdcp.dll"

It can make various registry changes during its installation, including:

In subkey: HKLM\software\microsoft\windows\currentversion\run
Sets value: "(default)"
With data: "file:%SystemRoot%\362.vbs"

Payload


Allows backdoor access and control

This threat can give a malicious hacker access and control of your PC. They can then perform a number of different actions, such as:

• Deleting files
• Downloading and running files
• Logging your keystrokes or stealing your sensitive data
• Modifying your system settings
• Running or stopping applications
• Spreading malware to other PCs
• Uploading files

Additional information

Creates a mutex

This threat can create a mutex on your PC. For example:

• QQQQQQrrGxvbGxtL2utbO9sq6pp6enp6==

It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.



This malware description was published using automated analysis of file SHA1 21955bba654878e036dcf886b73975bab25c1266.

Symptoms

The following can indicate that you have this threat on your PC:

• You see a file similar to:
  • %ProgramFiles%\%program files%\cest.bat
  • %ProgramFiles%\%program files%\laass.exe
  • %ProgramFiles%\%program files%\wdcp.dll

• You see registry modifications such as:
  
  • In subkey: HKLM\software\microsoft\windows\currentversion\run
    Sets value: "(default)"
    With data: "file:%SystemRoot%\362.vbs"
    
    
  • In subkey: HKLM\system\currentcontrolset\services\appmgmt\parameters
    Sets value: "ServiceDll"
    With data: "%ProgramFiles%\%program files%\wdcp.dll"
    
    
  • In subkey: HKLM\system\currentcontrolset\services\appmgmt
    Sets value: "Start"
    With data: "2"
    
    

• The presence of a mutex such as:
  • QQQQQQrrGxvbGxtL2utbO9sq6pp6enp6==

Last update 30 March 2015

 

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