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Win32.HLLW.Autoruner2.16168

Added to the Dr.Web virus database: 2014-07-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'e101a39ab5de59589562aa0ff3295ba5' = '"%TEMP%\csrss.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'e101a39ab5de59589562aa0ff3295ba5' = '"%TEMP%\csrss.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\e101a39ab5de59589562aa0ff3295ba5.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\csrss.exe' = '%TEMP%\csrss.exe:*:Enabled:csrss.exe'
Creates and executes the following:
  • '%TEMP%\csrss.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\csrss.exe" "csrss.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\csrss.exe
Network activity:
Connects to:
  • 'de#####e259.no-ip.org':1177
UDP:
  • DNS ASK de#####e259.no-ip.org
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
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