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Win32.HLLW.Autoruner1.54733
Added to the Dr.Web virus database:
2013-08-26
Virus description added:
2013-08-26
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'opesys' = '%WINDIR%\System\winsys.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'opesys' = '%WINDIR%\System\windll.exe'
Creates the following files on removable media:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\windll.exe
Malicious functions:
Executes the following:
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /v opesys /t REG_SZ /d %WINDIR%\System\windll.exe /f
'<SYSTEM32>\reg.exe' add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /v opesys /t REG_SZ /d %WINDIR%\System\winsys.exe /f
'<SYSTEM32>\taskkill.exe' /f /im internet.exe
'<SYSTEM32>\cmd.exe' /c %WINDIR%\System\winsys.bat
'<SYSTEM32>\cmd.exe' /c %WINDIR%\System\winsysdll.bat
Modifies file system :
Creates the following files:
%WINDIR%\system\winsysdll.bat
C:\windll.exe
C:\autorun.inf
%WINDIR%\system\winsys.bat
%WINDIR%\system\winlog.txt
%WINDIR%\system\windll.exe
%WINDIR%\system\winsys.exe
Modifies the HOSTS file.
Network activity:
Connects to:
'www.ho####nggas.co.th':80
TCP:
HTTP GET requests:
www.ho####nggas.co.th/product/images/wp-theme.php
UDP:
DNS ASK www.ho####nggas.co.th
Miscellaneous:
Searches for the following windows:
ClassName: '(null)' WindowName: '(null)'
ClassName: 'Indicator' WindowName: '(null)'
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