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Win32.HLLW.Autoruner1.27009

Added to the Dr.Web virus database: 2012-10-03

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'nvsvc32' = '%WINDIR%\nvsvc32.exe'
  • [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows] 'Run' = '%WINDIR%\nvsvc32.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\nvsvc32.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:
  • hidden files
Creates and executes the following:
  • %WINDIR%\ad1563.exe
  • %WINDIR%\nvsvc32.exe
  • %WINDIR%\ad1563.exe (downloaded from the Internet)
Sets a new unauthorized home page for Windows Internet Explorer.
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\KHMHGZ4F\ad1563[1].exe
  • %WINDIR%\ad1563.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\U98D4X8H\np.814e[1]
  • C:\sys32
  • %WINDIR%\nvsvc32.exe
  • %WINDIR%\regedit.com
  • <SYSTEM32>\cmd.com
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\nvsvc32.exe
  • <Drive name for removable media>:\autorun.inf
  • C:\sys32
  • %WINDIR%\nvsvc32.exe
  • %WINDIR%\regedit.com
  • <SYSTEM32>\cmd.com
Network activity:
Connects to:
  • 'localhost':1039
  • 'np.#14e.com':80
  • 'localhost':1036
  • 'im###s.sohu.net':80
TCP:
HTTP GET requests:
  • np.#14e.com/
  • im###s.sohu.net/softwareunion/1/ad1563.exe
UDP:
  • DNS ASK np.#14e.com
  • DNS ASK im###s.sohu.net
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: '' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''