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Win32.HLLW.Autoruner1.59550
Added to the Dr.Web virus database:
2013-10-25
Virus description added:
2013-10-31
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\RunOnce] 'Microsoft Windows Update Service' = '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, %APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Microsoft Windows Update Service' = '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe'
Creates the following files on removable media:
<Drive name for removable media>:\AuToRUN.inf
<Drive name for removable media>:\USB_Helper.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe' = '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe:*:Enabled:Microsoft Windows Update Service'
[<HKLM>\SYSTEM\ControlSet002\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe' = '%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe:*:Enabled:Microsoft Windows Update Service'
To complicate detection of its presence in the operating system,
forces the system hide from view:
Creates and executes the following:
'%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe'
Injects code into
the following system processes:
%WINDIR%\Explorer.EXE
<SYSTEM32>\ctfmon.exe
Modifies file system :
Creates the following files:
%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\AuToRUN.inf
<Drive name for removable media>:\USB_Helper.exe
%APPDATA%\Microsoft\CA8DC6DDDE1D22127B35B46E227A1C48\svchost.exe
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