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Win32.HLLW.Autoruner1.14712
Added to the Dr.Web virus database:
2012-04-14
Virus description added:
2012-05-04
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ctfmon' = '%ALLUSERSPROFILE%\Application Data\services.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'krnl32 dllhost' = '<DRIVERS>\dllhost.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'svchost' = '<DRIVERS>\svchost.exe'
Creates the following files on removable media:
<Drive name for removable media>:\Autorun.exe
<Drive name for removable media>:\Autorun.inf
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
blocks execution of the following system utilities:
Windows Task Manager (Taskmgr)
Registry Editor (RegEdit)
Creates and executes the following:
%ALLUSERSPROFILE%\Application Data\services.exe
<DRIVERS>\dllhost.exe
<DRIVERS>\svchost.exe
Modifies settings of Windows Explorer:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoDrives' = '00000004'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoControlPanel' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoStartMenuMorePrograms' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoClose' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFind' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoRun' = '00000001'
Modifies file system :
Creates the following files:
%ALLUSERSPROFILE%\Application Data\services.exe
C:\Autorun.exe
<DRIVERS>\dllhost.exe
C:\Autorun.inf
<DRIVERS>\svchost.exe
Sets the 'hidden' attribute to the following files:
%ALLUSERSPROFILE%\Application Data\services.exe
C:\Autorun.exe
<Drive name for removable media>:\Autorun.exe
<DRIVERS>\dllhost.exe
C:\Autorun.inf
<Drive name for removable media>:\Autorun.inf
<DRIVERS>\svchost.exe
Miscellaneous:
Searches for the following windows:
ClassName: '' WindowName: 'Command Prompt'
ClassName: '' WindowName: 'System Configuration Utility'
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