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Win32.HLLW.Autoruner2.19431
Added to the Dr.Web virus database:
2015-03-13
Virus description added:
2015-03-13
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\Userinit.exe,%TEMP%\svchost.exe'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\ntldr.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
hidden files
file extensions
Executes the following:
'<SYSTEM32>\WScript.exe' "<SYSTEM32>\s4c.vbs"
Modifies file system :
Creates the following files:
\Device\HarddiskVolume3\ntldr.exe
C:\autorun.inf
\Device\HarddiskVolume3\autorun.inf
\Device\Mup\.host\Shared Folders\vm_shara\autorun.inf
\Device\Mup\.host\Shared Folders\vm_shara\ntldr.exe
%WINDIR%\sp.htm
%TEMP%\svchost.exe
%TEMP%\desktop.ini
C:\ntldr.exe
<SYSTEM32>\s4c.vbs
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\autorun.inf
\Device\HarddiskVolume3\ntldr.exe
<Drive name for removable media>:\ntldr.exe
\Device\Mup\.host\Shared Folders\vm_shara\ntldr.exe
\Device\Mup\.host\Shared Folders\vm_shara\autorun.inf
%TEMP%\desktop.ini
%TEMP%\svchost.exe
C:\autorun.inf
\Device\HarddiskVolume3\autorun.inf
C:\ntldr.exe
Deletes the following files:
Network activity:
UDP:
DNS ASK dn#.##ftncsi.com
DNS ASK dc###.gulfup.com
Miscellaneous:
Searches for the following windows:
ClassName: 'Shell_TrayWnd' WindowName: ''
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