Trojan.DownLoader12.5995

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'AcIcUcAM.exe' = '%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'jaQEcQMQ.exe' = '%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\FkYQcQph] '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)

Creates and executes the following:

'%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe'
'%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe'
'%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe'

Executes the following:

'<SYSTEM32>\cmd.exe' /c ""%TEMP%\BskcQwQc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\kkwIwkoE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fCcUsEAU.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fygoAwEc.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\qiMwoEUY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\cywMoUsc.bat" "<Full path to virus>""
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\IGgEsEkk.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\PKcAYwIA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\HisocQEU.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs

Modifies file system :

Creates the following files:

<Current directory>\XYcs.ico
<Current directory>\vUEw.exe
C:\RCX11.tmp
<Current directory>\fYAk.ico
<Current directory>\LIUk.exe
C:\RCX10.tmp
<Current directory>\HIAo.ico
<Current directory>\Logy.exe
C:\RCX13.tmp
<Current directory>\KYMA.ico
<Current directory>\oIQu.exe
C:\RCX12.tmp
<Current directory>\YUkY.ico
<Current directory>\pMAM.ico
<Current directory>\EUkQ.exe
C:\RCXD.tmp
<Current directory>\GaAo.ico
<Current directory>\tsok.exe
C:\RCXC.tmp
<Current directory>\dQYU.ico
<Current directory>\okIK.exe
C:\RCXF.tmp
%TEMP%\cywMoUsc.bat
<Current directory>\VkQY.exe
C:\RCXE.tmp
<Current directory>\SkIE.ico
<Current directory>\jkMO.exe
<Current directory>\fkwO.exe
C:\RCX19.tmp
<Current directory>\DGUc.ico
<Current directory>\qgYi.exe
C:\RCX18.tmp
<Current directory>\JwAM.ico
<Current directory>\oUMA.exe
<Current directory>\xKcY.ico
<Current directory>\hQIE.exe
%TEMP%\qiMwoEUY.bat
C:\RCX1A.tmp
<Current directory>\SwYg.ico
<Current directory>\IwEC.exe
<Current directory>\dgkI.exe
C:\RCX15.tmp
<Current directory>\pask.ico
C:\RCX14.tmp
%TEMP%\SicsoIEM.bat
<Current directory>\OCwo.ico
<Current directory>\TMoo.exe
<Current directory>\gUgi.exe
C:\RCX17.tmp
<Current directory>\dOoM.ico
C:\RCX16.tmp
%TEMP%\sWIYEkEM.bat
<Current directory>\TCIk.ico
%TEMP%\ycMcgccI.bat
%TEMP%\kkwIwkoE.bat
<Current directory>\CEIy.exe
C:\RCX1.tmp
%TEMP%\fMEkgIgI.bat
%TEMP%\JCQswEcY.bat
%TEMP%\fCcUsEAU.bat
<Current directory>\GMQs.ico
<Current directory>\VGog.ico
<Current directory>\OUAE.exe
C:\RCX3.tmp
<Current directory>\rUgy.exe
C:\RCX2.tmp
%TEMP%\xoMkUoYs.bat
<Current directory>\<Virus name>
%TEMP%\DSwgQkIA.bat
%ALLUSERSPROFILE%\casg.txt
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\tyYAgwYE.bat
%TEMP%\IGgEsEkk.bat
%TEMP%\CGEAAcoM.bat
<Current directory>\NWkQ.ico
%TEMP%\PKcAYwIA.bat
%TEMP%\RowYgkgM.bat
%TEMP%\file.vbs
%TEMP%\HisocQEU.bat
<Current directory>\QQYM.ico
<Current directory>\wUEe.exe
C:\RCX9.tmp
%TEMP%\EwEIAAoY.bat
<Current directory>\SIIA.exe
C:\RCX8.tmp
<Current directory>\eGwU.ico
<Current directory>\IIws.ico
<Current directory>\cYgI.ico
<Current directory>\TAcs.exe
C:\RCXB.tmp
<Current directory>\LksG.exe
%TEMP%\fygoAwEc.bat
C:\RCXA.tmp
<Current directory>\VgUe.exe
C:\RCX5.tmp
<Current directory>\VAYw.ico
<Current directory>\ZkAQ.exe
C:\RCX4.tmp
<Current directory>\lKUo.ico
<Current directory>\toUu.exe
<Current directory>\WgYk.exe
C:\RCX7.tmp
<Current directory>\OAsg.ico
C:\RCX6.tmp
%TEMP%\BskcQwQc.bat
<Current directory>\bQMA.ico

Sets the 'hidden' attribute to the following files:

%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe
%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe

Deletes the following files:

<Current directory>\XYcs.ico
<Current directory>\oIQu.exe
<Current directory>\fYAk.ico
<Current directory>\vUEw.exe
<Current directory>\YUkY.ico
<Current directory>\jkMO.exe
<Current directory>\HIAo.ico
<Current directory>\Logy.exe
<Current directory>\pMAM.ico
<Current directory>\VkQY.exe
%TEMP%\ycMcgccI.bat
<Current directory>\EUkQ.exe
<Current directory>\SkIE.ico
<Current directory>\LIUk.exe
<Current directory>\dQYU.ico
<Current directory>\okIK.exe
<Current directory>\fkwO.exe
<Current directory>\JwAM.ico
<Current directory>\qgYi.exe
<Current directory>\dOoM.ico
<Current directory>\DGUc.ico
<Current directory>\SwYg.ico
<Current directory>\oUMA.exe
<SYSTEM32>\shell32.dll
<Current directory>\dgkI.exe
<Current directory>\OCwo.ico
<Current directory>\KYMA.ico
%TEMP%\SicsoIEM.bat
<Current directory>\gUgi.exe
<Current directory>\TCIk.ico
<Current directory>\TMoo.exe
<Current directory>\pask.ico
<Current directory>\OUAE.exe
%TEMP%\xoMkUoYs.bat
<Current directory>\rUgy.exe
<Current directory>\GMQs.ico
<Current directory>\QQYM.ico
<Current directory>\VgUe.exe
<Current directory>\VGog.ico
<Current directory>\ZkAQ.exe
%TEMP%\RowYgkgM.bat
%TEMP%\CGEAAcoM.bat
%TEMP%\tyYAgwYE.bat
%TEMP%\DSwgQkIA.bat
<Current directory>\CEIy.exe
<Current directory>\NWkQ.ico
%TEMP%\fMEkgIgI.bat
%TEMP%\JCQswEcY.bat
<Current directory>\LksG.exe
<Current directory>\IIws.ico
<Current directory>\wUEe.exe
<Current directory>\eGwU.ico
<Current directory>\tsok.exe
<Current directory>\GaAo.ico
<Current directory>\TAcs.exe
<Current directory>\cYgI.ico
<Current directory>\VAYw.ico
<Current directory>\WgYk.exe
<Current directory>\lKUo.ico
<Current directory>\toUu.exe
<Current directory>\OAsg.ico
%TEMP%\EwEIAAoY.bat
<Current directory>\bQMA.ico
<Current directory>\SIIA.exe

Moves the following files:

from C:\RCX11.tmp to <Current directory>\vUEw.exe
from C:\RCX12.tmp to <Current directory>\oIQu.exe
from C:\RCX13.tmp to <Current directory>\Logy.exe
from C:\RCXE.tmp to <Current directory>\VkQY.exe
from C:\RCXF.tmp to <Current directory>\okIK.exe
from C:\RCX10.tmp to <Current directory>\LIUk.exe
from C:\RCX14.tmp to <Current directory>\jkMO.exe
from C:\RCX18.tmp to <Current directory>\qgYi.exe
from C:\RCX19.tmp to <Current directory>\fkwO.exe
from C:\RCX1A.tmp to <Current directory>\oUMA.exe
from C:\RCX15.tmp to <Current directory>\dgkI.exe
from C:\RCX16.tmp to <Current directory>\TMoo.exe
from C:\RCX17.tmp to <Current directory>\gUgi.exe
from C:\RCX4.tmp to <Current directory>\ZkAQ.exe
from C:\RCX5.tmp to <Current directory>\VgUe.exe
from C:\RCX6.tmp to <Current directory>\toUu.exe
from C:\RCX1.tmp to <Current directory>\CEIy.exe
from C:\RCX2.tmp to <Current directory>\rUgy.exe
from C:\RCX3.tmp to <Current directory>\OUAE.exe
from C:\RCX7.tmp to <Current directory>\WgYk.exe
from C:\RCXB.tmp to <Current directory>\TAcs.exe
from C:\RCXC.tmp to <Current directory>\tsok.exe
from C:\RCXD.tmp to <Current directory>\EUkQ.exe
from C:\RCX8.tmp to <Current directory>\SIIA.exe
from C:\RCX9.tmp to <Current directory>\wUEe.exe
from C:\RCXA.tmp to <Current directory>\LksG.exe

Network activity:

Connects to:

'74.##5.232.51':80

TCP:

HTTP GET requests:

74.##5.232.51/

UDP:

DNS ASK google.com

Miscellaneous:

Searches for the following windows:

ClassName: '' WindowName: 'Microsoft Windows'
ClassName: '' WindowName: 'jaQEcQMQ.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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