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Backdoor:Win32/Zegost.DE

First posted on 15 April 2015.
Source: Microsoft

Aliases :

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

Explanation :

Threat behavior

Installation

This threat drops itself as winautoupdate.com in the %SystemRoot% directory.

It also drops the 5500.vbs file (SHA1: 2301d6c6a14be596284043d54322b1600a9340bc) in the C directory.



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:

• GOOGLEUPDATE.EXE"

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 4a00faa3b4b0d5c4e0d9e2e16b8bcd4eefb21459.

Symptoms

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

• You see registry modifications such as:
  
  • In subkey: HKLM\system\currentcontrolset\services\uvwxya cdefghij lmn
    Sets value: "SYSTEM\CurrentControlSet\Services\Uvwxya Cdefghij Lmn"
    With data: "uvwxyabc efghijklm opqrstu wxyabcde ghi"
    
    

• You see the following mutex:
  • GOOGLEUPDATE.EXE"

Last update 15 April 2015

 

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