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TrojanClicker:Win32/Buoveco.A

First posted on 23 October 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanClicker:Win32/Buoveco.A.

Explanation :

Threat behavior

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

• %APPDATA%\windows activator\windows activator.exe
• %APPDATA%\winprep.exe
• %APPDATA%\winsvy.bat
• %TEMP%\9dcf.tmp\kmsserverservice.exe
• %TEMP%\9dcf.tmp\tap-windows.exe
• %TEMP%\9dcf.tmp\tunmirror.exe

The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.



Payload


Clicks on advertisements

This trojan can use your PC to click on online advertisements without your permission or knowledge.

A malicious hacker can earn money out of these clicks by making a website or application appear more popular than it is.



Creates an uninstaller



This threat can create an uninstaller by modifying the registry. For example:

In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall

Sets value: "DisplayIcon"
With data: ""

Sets value: "DisplayName"
With data: ""

Sets value: "DisplayVersion"
With data: "1.0.6.0"

Sets value: "EstimatedSize"
With data: "0x000001e2"

Sets value: "InstallDate"
With data: "20150922"

Sets value: "InstallLocation"
With data: "%ProgramFiles%\windows 8 activator\windows 8 activator\"

Sets value: "InstallSource"
With data: "%CurrentFolder%"

Sets value: "Language"
With data: "0x00000409"

Sets value: "NoModify"
With data: "0x00000001"

Sets value: "NoRepair"
With data: "0x00000001"

Sets value: "Publisher"
With data: "windows 8 activator"

Sets value: "UninstallString"
With data: ""

Sets value: "VersionMajor"
With data: "0x00000001"

Sets value: "VersionMinor"
With data: "0x00000000"



Additional information

Creates a mutex

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

• {C20CD437-BA6D-4ebb-B190-70B43DE3B0F3}

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 f31c28e19816a56562b07a2d847b1bcfed08c220.

Symptoms

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

• You see a file similar to:
  • %APPDATA%\windows activator\windows activator.exe
  • %APPDATA%\winprep.exe
  • %APPDATA%\winsvy.bat
  • %TEMP%\9dcf.tmp\kmsserverservice.exe
  • %TEMP%\9dcf.tmp\tap-windows.exe
  • %TEMP%\9dcf.tmp\tunmirror.exe

• You see registry modifications such as:
  
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "DisplayIcon"
    With data: ""
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "DisplayName"
    With data: ""
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "DisplayVersion"
    With data: "1.0.6.0"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "EstimatedSize"
    With data: "0x000001e2"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "InstallDate"
    With data: "20150922"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "InstallLocation"
    With data: "%ProgramFiles%\windows 8 activator\windows 8 activator\"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "InstallSource"
    With data: "%CurrentFolder%"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "Language"
    With data: "0x00000409"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "NoModify"
    With data: "0x00000001"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "NoRepair"
    With data: "0x00000001"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "Publisher"
    With data: "windows 8 activator"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "UninstallString"
    With data: ""
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "VersionMajor"
    With data: "0x00000001"
    
    
  • In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    Sets value: "VersionMinor"
    With data: "0x00000000"
    
    

• You see the following mutex:
  • {C20CD437-BA6D-4ebb-B190-70B43DE3B0F3}

Last update 23 October 2015

 

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