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Win32.HLLW.Autoruner2.16140
Added to the Dr.Web virus database:
2014-07-15
Virus description added:
2014-07-15
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'a1cb70ac7dd1255902a9d5a3996ddec8' = '"%APPDATA%\system.exe" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'a1cb70ac7dd1255902a9d5a3996ddec8' = '"%APPDATA%\system.exe" ..'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\system.exe' = '%APPDATA%\system.exe:*:Enabled:system.exe'
Creates and executes the following:
'%APPDATA%\system.exe'
'C:\Extracted\servercrypt.exe'
Executes the following:
'<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\system.exe" "system.exe" ENABLE
'<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen C:\Extracted\Hydrangeas.jpg
Modifies file system :
Creates the following files:
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
%HOMEPATH%\Recent\Extracted.lnk
%HOMEPATH%\Recent\Hydrangeas.lnk
C:\Extracted\servercrypt.exe
%TEMP%\sfx.ini
%APPDATA%\system.exe
C:\Extracted\Hydrangeas.jpg
Deletes the following files:
Moves the following files:
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch
Network activity:
Connects to:
'ma#####ehn.no-ip.biz':1177
UDP:
DNS ASK ma#####ehn.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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