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Win32.HLLW.Siggen.3956

Added to the Dr.Web virus database: 2012-07-07

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'KB01321295.exe' = '"%APPDATA%\KB01321295.exe"'
Malicious functions:
Creates and executes the following:
  • %APPDATA%\KB01321295.exe
Executes the following:
  • %WINDIR%\explorer.exe
Injects code into
the following system processes:
  • <SYSTEM32>\cscript.exe
a large number of user processes.
Modifies file system :
Creates the following files:
  • %TEMP%\exp1.tmp.bat
  • %APPDATA%\KB01321295.exe
Deletes itself.
Miscellaneous:
Searches for the following windows:
  • ClassName: 'OleMainThreadWndClass' WindowName: ''
  • ClassName: 'SysListView32' WindowName: ''
  • ClassName: 'CSCHiddenWindow' WindowName: ''
  • ClassName: 'SystemTray_Main' WindowName: ''
  • ClassName: 'Proxy Desktop' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: 'BaseBar' WindowName: 'ChanApp'
  • ClassName: 'Shell_TrayWnd' WindowName: ''

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