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Win32.HLLW.Silka.187

Added to the Dr.Web virus database: 2016-08-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'HKCU' = '%ProgramFiles%\Panda\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{8C34557U-U7KB-R50A-3NO6-3K1SB57BU5KM}] 'StubPath' = '%ProgramFiles%\Panda\svchost.exe Restart'
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{8C34557U-U7KB-R50A-3NO6-3K1SB57BU5KM}] 'StubPath' = '%ProgramFiles%\Panda\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run] 'Policies' = '%ProgramFiles%\Panda\svchost.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Policies' = '%ProgramFiles%\Panda\svchost.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'HKLM' = '%ProgramFiles%\Panda\svchost.exe'
Malicious functions:
Creates and executes the following:
  • '%ProgramFiles%\Panda\svchost.exe'
Executes the following:
  • '%ProgramFiles%\Panda\svchost.exe'
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Modifies file system:
Creates the following files:
  • %TEMP%\%USERNAME%7
  • %TEMP%\%USERNAME%8
  • %APPDATA%\%USERNAME%log.dat
  • %ProgramFiles%\Panda\svchost.exe
  • %TEMP%\%USERNAME%2.txt
Sets the 'hidden' attribute to the following files:
  • %APPDATA%\%USERNAME%log.dat
Deletes the following files:
  • %TEMP%\%USERNAME%7
  • %TEMP%\%USERNAME%8
  • %TEMP%\%USERNAME%2.txt
Network activity:
Connects to:
  • 'cy#####te777.no-ip.biz':6000
UDP:
  • DNS ASK cy#####te777.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Shell_TrayWnd' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''