Win32.HLLW.Autoruner1.3666
Added to the Dr.Web virus database:
2011-11-19
Virus description added:
2011-11-19
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\winlogon.exe"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSWUpdate' = '"%APPDATA%\winlogon.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe "%APPDATA%\winlogon.exe"'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\winlogon.exe' = '%APPDATA%\winlogon.exe:*:Enabled:CityScape'
Creates and executes the following:
- %APPDATA%\winlogon.exe
- %TEMP%\%tmp%.exe
- %TEMP%\svhost.exe
Executes the following:
- <SYSTEM32>\netsh.exe firewall add allowedprogram "%APPDATA%\winlogon.exe" CityScape Enable
- <SYSTEM32>\rundll32.exe <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen %TEMP%\Default.jpg
Modifies file system :
Creates the following files:
- %APPDATA%\osvOwyVL
- %APPDATA%\winlogon.exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\locate_my_ip[1]
- %TEMP%\svhost.exe
- %TEMP%\Default.jpg
- %TEMP%\%tmp%.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\SYSTEM.EXE
- %APPDATA%\winlogon.exe
Deletes the following files:
- %TEMP%\%tmp%.exe
- %APPDATA%\osvOwyVL
Network activity:
Connects to:
- 'ca#####123.dyndns.org':3177
- 'www.ma##ind.com':80
- 'localhost':1036
TCP:
HTTP GET requests:
- www.ma##ind.com/app/locate_my_ip
UDP:
- DNS ASK ca#####123.dyndns.org
- DNS ASK www.ma##ind.com
- '<Private IP address>':1037
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: ''
- ClassName: '' WindowName: 'HB'
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