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Win32.HLLW.Autoruner.54436

Added to the Dr.Web virus database: 2011-07-18

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '(Default)' = '<SYSTEM32>\dllcache\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'CPQEASYBTTN' = '<SYSTEM32>\GroupPolicy\BttnServ.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.inf
  • <Drive name for removable media>:\Pictures.exe
  • <Drive name for removable media>:\Folders.exe
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\dllcache\svchost.exe 
  • <SYSTEM32>\GroupPolicy\BttnServ.exe 
Modifies settings of Windows Internet Explorer:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Associations] 'LowRiskFileTypes' = '.exe'
Modifies file system :
Creates the following files:
  • %WINDIR%\Pictures.exe
  • %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\index[1].html
  • C:\Pictures.exe
  • <SYSTEM32>\GroupPolicy\BttnServ.exe
  • <SYSTEM32>\dllcache\svchost.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Folders.exe
  • <Drive name for removable media>:\Autorun.inf
  • <SYSTEM32>\GroupPolicy\BttnServ.exe
  • <SYSTEM32>\dllcache\svchost.exe
Deletes the following files:
  • <Drive name for removable media>:\Folders.exe
  • <Drive name for removable media>:\Pictures.exe
  • C:\Pictures.exe
  • <SYSTEM32>\GroupPolicy\BttnServ.exe
  • <SYSTEM32>\dllcache\svchost.exe
Network activity:
Connects to:
  • 'de#####.freespaces.com':80
  • 'localhost':1034
TCP:
HTTP GET requests:
  • de#####.freespaces.com/index.html
UDP:
  • DNS ASK de#####.freespaces.com
Miscellaneous:
Searches for the following windows:
  • ClassName: 'MS_AutodialMonitor' WindowName: ''
  • ClassName: 'MS_WebcheckMonitor' WindowName: ''
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: '' WindowName: ''