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Win32.HLLW.Autoruner1.58752

Added to the Dr.Web virus database: 2013-10-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Corp' = '%APPDATA%\csrss.exe '
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Microsoft Corp' = '%APPDATA%\csrss.exe '
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\csrss.exe ' = '%APPDATA%\csrss.exe :*:Enabled:Microsoft Corp'
Creates and executes the following:
  • '%APPDATA%\csrss.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram csrss.exe csrss ENABLE
Modifies file system :
Creates the following files:
  • %APPDATA%\csrss.exe
  • <SYSTEM32>\Shortcut.exe
Sets the 'hidden' attribute to the following files:
  • %APPDATA%\csrss.exe
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'