Win32.HLLW.Autoruner.56241
Added to the Dr.Web virus database:
2011-08-13
Virus description added:
2011-08-13
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Sys-Boot' = '%WINDIR%\Win-boot.EXE'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Sys32-w32' = '<SYSTEM32>\Booter.EXE'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'Explorer.exe Win-boot.EXE'
Creates the following files on removable media:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\Ntldr.EXE
- <Drive name for removable media>:\Documents %USERNAME%.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
- Registry Editor (RegEdit)
blocks the following features:
Creates and executes the following:
- %ALLUSERSPROFILE%\Application Data\Win-Fixed.exe (downloaded from the Internet)
Executes the following:
- <SYSTEM32>\at.exe 12:00 /interactive /EVERY:m,t,w,th,f,s,su <SYSTEM32>\Booter.EXE
- <SYSTEM32>\at.exe /delete /yes
Modifies settings of Windows Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoRun' = '00000001'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] 'NoFind' = '00000001'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer] 'NoFolderOptions' = '00000001'
Forces autoplay for removable media.
Modifies file system :
Creates the following files:
- <SYSTEM32>\Booter.EXE
- %WINDIR%\Win-boot.EXE
- C:\Autorun.inf
- %ALLUSERSPROFILE%\Application Data\Win-Fixed.exe
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\0D6B6PI5\Image987[1].exe
- %TEMP%\omsieus
- %TEMP%\aut1.tmp
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\Exe_Debuger[1].ini
- C:\Ntldr.EXE
- %ALLUSERSPROFILE%\Application Data\Exe_Debuger.ini
Sets the 'hidden' attribute to the following files:
- C:\Autorun.inf
- %ALLUSERSPROFILE%\Application Data\Win-Fixed.exe
- <Drive name for removable media>:\Autorun.inf
- C:\Ntldr.EXE
- %WINDIR%\Win-boot.EXE
- <SYSTEM32>\Booter.EXE
Deletes the following files:
- <Drive name for removable media>:\Autorun.inf
- %TEMP%\omsieus
- %TEMP%\aut1.tmp
Network activity:
Connects to:
TCP:
HTTP GET requests:
- fw#.#xdnl.com/6-10/e/v/evilboss/Image987.exe
- fw#.#xdnl.com/6-10/e/v/evilboss/Exe_Debuger.ini
UDP:
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
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