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Win32.HLLW.Autoruner2.8128
Added to the Dr.Web virus database:
2014-02-21
Virus description added:
2014-02-22
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '90efe5145d687dd1134d2d3aa7f02d55' = '"%TEMP%\netuser.exe" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '90efe5145d687dd1134d2d3aa7f02d55' = '"%TEMP%\netuser.exe" ..'
Creates or modifies the following files:
%HOMEPATH%\Start Menu\Programs\Startup\90efe5145d687dd1134d2d3aa7f02d55.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\netuser.exe' = '%TEMP%\netuser.exe:*:Enabled:netuser.exe'
Creates and executes the following:
'%TEMP%\netuser.exe'
'%TEMP%\285.exe'
Executes the following:
'<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\netuser.exe" "netuser.exe" ENABLE
Modifies file system :
Creates the following files:
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
%TEMP%\285.exe
%TEMP%\netuser.exe
Moves the following files:
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: '(null)'
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