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Win32.HLLW.Autoruner.52426

Added to the Dr.Web virus database: 2011-06-24

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{TV3315XC-0ORT-TKQ8-QEP0-662T0J2888K4}] 'StubPath' = '<SYSTEM32>\Flach\flach .exe Restart'
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{TV3315XC-0ORT-TKQ8-QEP0-662T0J2888K4}] 'StubPath' = ''
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'HKLM' = ''
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'HKCU' = ''
Creates the following files on removable media:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\1.exe
Malicious functions:
Creates and executes the following:
  • <SYSTEM32>\Flach\flach .exe 
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Modifies file system :
Creates the following files:
  • %PROGRAM_FILES%\1.exe
  • %WINDIR%\Temp\1.exe
  • <SYSTEM32>\1.exe
  • %TEMP%\UuU.uUu
  • %TEMP%\XxX.xXx
  • %APPDATA%\logs.dat
  • C:\autorun.inf
  • <SYSTEM32>\Flach\flach .exe
  • C:\1.exe
  • %WINDIR%\2.exe
  • %WINDIR%\1.exe
  • %TEMP%\XX--XX--XX.txt
Sets the 'hidden' attribute to the following files:
  • %WINDIR%\Temp\1.exe
  • <SYSTEM32>\1.exe
  • %PROGRAM_FILES%\1.exe
  • %APPDATA%\logs.dat
  • <SYSTEM32>\Flach\flach .exe
  • %WINDIR%\2.exe
  • C:\autorun.inf
  • C:\1.exe
  • <Drive name for removable media>:\1.exe
  • %WINDIR%\1.exe
  • <Drive name for removable media>:\autorun.inf
Deletes the following files:
  • %TEMP%\XxX.xXx
  • %TEMP%\UuU.uUu
  • %TEMP%\XX--XX--XX.txt
Network activity:
Connects to:
  • 'fa####20.no-ip.biz':5555
  • 'localhost':5555
UDP:
  • DNS ASK fa####20.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''