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Win32.HLLW.Autoruner2.15757

Added to the Dr.Web virus database: 2014-06-22

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '5cd8f17f4086744065eb0992a09e05a2' = '"%TEMP%\Trojan.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '5cd8f17f4086744065eb0992a09e05a2' = '"%TEMP%\Trojan.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\5cd8f17f4086744065eb0992a09e05a2.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\Trojan.exe' = '%TEMP%\Trojan.exe:*:Enabled:Trojan.exe'
Creates and executes the following:
  • '%TEMP%\Trojan.exe'
  • '<LS_APPDATA>LsEkIghwBS.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\Trojan.exe" "Trojan.exe" ENABLE
  • '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen <LS_APPDATA>sZKSQNmDGh.jpg
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Recent\Application DatasZKSQNmDGh.lnk
  • %HOMEPATH%\Recent\Local Settings.lnk
  • %TEMP%\Trojan.exe
  • <LS_APPDATA>LsEkIghwBS.exe
  • <LS_APPDATA>sZKSQNmDGh.jpg
Network activity:
Connects to:
  • 'ko###.no-ip.biz':1177
UDP:
  • DNS ASK ko###.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'
  • ClassName: 'Shell_TrayWnd' WindowName: '(null)'
  • ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'

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