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Win32.HLLW.Autoruner2.5134

Added to the Dr.Web virus database: 2014-02-04

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '8ef6e5fbcf93c20a9c240921a52d8776' = '"%TEMP%\yahoo.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '8ef6e5fbcf93c20a9c240921a52d8776' = '"%TEMP%\yahoo.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\8ef6e5fbcf93c20a9c240921a52d8776.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\yahoo.exe' = '%TEMP%\yahoo.exe:*:Enabled:yahoo.exe'
Creates and executes the following:
  • '%TEMP%\yahoo.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\yahoo.exe" "yahoo.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\yahoo.exe
Network activity:
Connects to:
  • 'ns###.no-ip.biz':1177
UDP:
  • DNS ASK ns###.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'