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Backdoor:Win32/Zegost.DA

First posted on 30 March 2015.
Source: Microsoft

Aliases :

There are no other names known for Backdoor:Win32/Zegost.DA.

Explanation :

Threat behavior

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

• %SystemRoot%\wwgqww.exe

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

Connects to a remote host

We have seen this threat connect to a remote host, including:

• bydingfan.com using port 1998

Malware can connect to a remote host to do any of the following:

• Check for an Internet connection
• Download and run files (including updates or other malware)
• Report a new infection to its author
• Receive configuration or other data
• Receive instructions from a malicious hacker
• Search for your PC location
• Upload information taken from your PC
• Validate a digital certificate

It can stop some processes from running on your PC, including:

• rundll32.exe

Additional information

Creates a mutex

This threat can create one or more mutexes on your PC. For example:

• %SystemRoot% \wwgqww.exe
• .exe
• bydingfan.com 1998
• eed3bd3a-a1ad-4e99-987b-d7cb3fcfa7f0 - S-1-5-18

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 edfc58eb7b36c14d53a4211bc906cfca305ecec6.

Symptoms

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

• You see a file similar to:
  • %SystemRoot%\wwgqww.exe

• You see registry modifications such as:
  
  • In subkey: HKLM\system\currentcontrolset\services\jklmno qrstuvwx abc
    Sets value: "Description"
    With data: "jklmnopq stuvwxyab defghij lmnopqrs uvw"
    
    

• The presence of a mutex such as:
  • %SystemRoot%\wwgqww.exe
  • .exe
  • bydingfan.com 1998
  • eed3bd3a-a1ad-4e99-987b-d7cb3fcfa7f0 - S-1-5-18

Last update 30 March 2015

 

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