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Win32.HLLW.Autoruner1.29025
Added to the Dr.Web virus database:
2012-10-31
Virus description added:
2012-10-31
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
Creates the following services:
[<HKLM>\SYSTEM\ControlSet001\Services\~bnjitffk~] 'Start' = '00000002'
Creates the following files on removable media:
<Drive name for removable media>:\gjjet.exe
<Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\Trojan.exe' = '%TEMP%\Trojan.exe:*:Enabled:Trojan.exe'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\2.exe' = '%TEMP%\2.exe:*:Enabled:ipsec'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
blocks the following features:
User Account Control (UAC)
Windows Security Center
Creates and executes the following:
<SYSTEM32>\2.exe
%TEMP%\2.exe
%TEMP%\1.exe
Executes the following:
<SYSTEM32>\netsh.exe firewall add allowedprogram "%TEMP%\Trojan.exe" "Trojan.exe" ENABLE
Injects code into
the following system processes:
a large number of user processes.
Modifies file system :
Creates the following files:
<SYSTEM32>\2.ini
%TEMP%\Trojan.exe
%TEMP%\winsajs.exe
C:\mhgod.pif
C:\autorun.inf
%TEMP%\2.exe
%TEMP%\1.exe
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
<SYSTEM32>\2.exe
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
Sets the 'hidden' attribute to the following files:
<Drive name for removable media>:\autorun.inf
<Drive name for removable media>:\gjjet.exe
C:\autorun.inf
C:\mhgod.pif
Deletes the following files:
%TEMP%\Trojan.exe
%TEMP%\winsajs.exe
%TEMP%\1.exe
%TEMP%\2.exe
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
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''
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