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Backdoor:Win32/Bergat.B

First posted on 16 June 2014.
Source: Microsoft

Aliases :

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

Explanation :

Threat behavior

Installation

Backdoor:Win32/Bergat.B copies itself to c:\documents and settings\administrator\application data\microsoft\0fficekey.exe. The malware changes the following registry entries so that it runs each time you start your PC:

In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Sets value: "HKLM"
With data: "c:\documents and settings\administrator\application data\microsoft\0fficekey.exe" The malware creates the following files on your PC:

• c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.dat
• c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.nfo
• c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.svr
• c:\documents and settings\administrator\local settings\temp\aute.tmp
• c:\documents and settings\administrator\local settings\temp\autf.tmp
• c:\documents and settings\administrator\local settings\temp\rpe90c.lp2

The malware uses code injection to make it harder to detect and remove. It can inject code into running processes, including the following:

• svchost.exe

Payload

Stops processes

Backdoor:Win32/Bergat.B can stop the following processes:

• svchost.exe

Allows backdoor access and control

The malware gives a hacker access and control of your PC. They can then perform a number of different actions, including:

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

This malware description was produced and published using automated analysis of file SHA1 4ccf52fe444bd4a423450533ce10ff26761dd4c8.Symptoms

System changes

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

• You have these files:
  
  c:\documents and settings\administrator\application data\microsoft\0fficekey.exe
  c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.dat
  c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.nfo
  c:\documents and settings\administrator\application data\microsoft\windows\p23tlcdmg0h\p23tlcdmg0h.svr
  c:\documents and settings\administrator\local settings\temp\aute.tmp
  c:\documents and settings\administrator\local settings\temp\autf.tmp
  c:\documents and settings\administrator\local settings\temp\rpe90c.lp2

• You see these entries or keys in your registry:
  
  Sets value: "HKLM"
  With data: "c:\documents and settings\administrator\application data\microsoft\0fficekey.exe"
  In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Last update 16 June 2014

 

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