Trojan.DownLoader25.16372

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'SSIkQYgQ.exe' = '%HOMEPATH%\gOEYMkgs\SSIkQYgQ.exe'
[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%ALLUSERSPROFILE%\WuIEgAsU\lacMcYws.exe,'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\vwYgEQEb] 'ImagePath' = '%ALLUSERSPROFILE%\tuIMYcEM\ZgMYMIIE.exe'
[<HKLM>\SYSTEM\ControlSet001\Services\vwYgEQEb] 'Start' = '00000002'

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files
file extensions

blocks the following features:

User Account Control (UAC)

Executes the following:

'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\cmd.exe' /c "<Current directory>\<File name>"
'%HOMEPATH%\gOEYMkgs\SSIkQYgQ.exe'
'%ALLUSERSPROFILE%\WuIEgAsU\lacMcYws.exe'
'%ALLUSERSPROFILE%\tuIMYcEM\ZgMYMIIE.exe'

Modifies file system:

Creates the following files:

%TEMP%\WER6cbd.dir00\ZgMYMIIE.exe.mdmp
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\duck.bmp.exe
%HOMEPATH%\gOEYMkgs\GcMA.exe
%HOMEPATH%\gOEYMkgs\foAm.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\frog.bmp.exe
%HOMEPATH%\gOEYMkgs\rMMM.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\fish.bmp.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\dirt bike.bmp.exe
%HOMEPATH%\gOEYMkgs\KAIi.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\chess.bmp.exe
%HOMEPATH%\gOEYMkgs\HEgw.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\drip.bmp.exe
%HOMEPATH%\gOEYMkgs\MYQM.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\dog.bmp.exe
%HOMEPATH%\gOEYMkgs\RAkQ.exe
%HOMEPATH%\gOEYMkgs\bwYU.exe
%TEMP%\WER6cbd.dir00\appcompat.txt
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\lift-off.bmp.exe
%TEMP%\WER6cbd.dir00\manifest.txt
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\pink flower.bmp.exe
%HOMEPATH%\gOEYMkgs\UoEC.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\palm tree.bmp.exe
%TEMP%\WER6cbd.dir00\ZgMYMIIE.exe.hdmp
%HOMEPATH%\gOEYMkgs\TAUK.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\guitar.bmp.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\horses.bmp.exe
%HOMEPATH%\gOEYMkgs\uAAm.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\kick.bmp.exe
%HOMEPATH%\gOEYMkgs\HoMm.exe
%HOMEPATH%\gOEYMkgs\Lsoi.exe
<Current directory>\<File name>
%TEMP%\WER6f32.dir00\manifest.txt
%TEMP%\WER6f32.dir00\appcompat.txt
%ALLUSERSPROFILE%\caQc.txt
%HOMEPATH%\gOEYMkgs\YQgg.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\airplane.bmp.exe
%HOMEPATH%\gOEYMkgs\SYQo.exe
%HOMEPATH%\gOEYMkgs\SSIkQYgQ.exe
%ALLUSERSPROFILE%\WuIEgAsU\lacMcYws
%HOMEPATH%\gOEYMkgs\SSIkQYgQ
%ALLUSERSPROFILE%\WuIEgAsU\lacMcYws.exe
%TEMP%\WER6f32.dir00\ZgMYMIIE.exe.hdmp
%TEMP%\WER6f32.dir00\ZgMYMIIE.exe.mdmp
%ALLUSERSPROFILE%\tuIMYcEM\ZgMYMIIE.exe
%TEMP%\WEReb58.dir00\ZgMYMIIE.exe.mdmp
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\car.bmp.exe
%TEMP%\WEReb58.dir00\ZgMYMIIE.exe.hdmp
%HOMEPATH%\gOEYMkgs\HUMO.exe
%HOMEPATH%\gOEYMkgs\kEUi.exe
%TEMP%\WEReb58.dir00\manifest.txt
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\cat.bmp.exe
%TEMP%\WEReb58.dir00\appcompat.txt
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\ball.bmp.exe
%HOMEPATH%\gOEYMkgs\HQwk.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\astronaut.bmp.exe
%HOMEPATH%\gOEYMkgs\ScMm.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\butterfly.bmp.exe
%HOMEPATH%\gOEYMkgs\IgEY.exe
%ALLUSERSPROFILE%\Application Data\Microsoft\User Account Pictures\Default Pictures\beach.bmp.exe