Trojan.DownLoader12.6814

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%\NiUYMYIY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\CSQUMEUc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\pskcgcAc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\JGwsQEsg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\eMYwIMQg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\gMcEAEMQ.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<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%\YEkUAUco.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\oKUkUAAs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\SiEwMwsU.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs

Modifies file system :

Creates the following files:

C:\RCXF.tmp
<Current directory>\lwYg.ico
<Current directory>\rMgo.exe
%TEMP%\AsAkwMIA.bat
<Current directory>\QYUM.ico
<Current directory>\Jokg.exe
C:\RCX11.tmp
%TEMP%\eMYwIMQg.bat
<Current directory>\AAAw.ico
C:\RCX10.tmp
<Current directory>\gIkM.ico
<Current directory>\QkIC.exe
C:\RCXE.tmp
%TEMP%\JGwsQEsg.bat
C:\RCXC.tmp
%TEMP%\mogUsMkg.bat
C:\RCXB.tmp
<Current directory>\jaEE.ico
<Current directory>\jMYE.exe
<Current directory>\rKsU.ico
<Current directory>\gYgg.exe
%TEMP%\gMcEAEMQ.bat
<Current directory>\MCsE.ico
<Current directory>\RgAq.exe
C:\RCXD.tmp
<Current directory>\icoI.ico
<Current directory>\YYEq.exe
C:\RCX17.tmp
<Current directory>\SuQs.ico
<Current directory>\SAgQ.exe
C:\RCX16.tmp
<Current directory>\wwgQ.ico
<Current directory>\GwEc.exe
C:\RCX19.tmp
<Current directory>\xsUw.ico
<Current directory>\Vokg.exe
C:\RCX18.tmp
%TEMP%\rYIQwEUk.bat
<Current directory>\Fcwk.ico
<Current directory>\NwYk.exe
C:\RCX13.tmp
%TEMP%\QsMMoYYk.bat
<Current directory>\iEoi.exe
C:\RCX12.tmp
<Current directory>\yiwI.ico
<Current directory>\NUUq.exe
C:\RCX15.tmp
<Current directory>\cKoU.ico
<Current directory>\vwIQ.exe
C:\RCX14.tmp
<Current directory>\bwIq.exe
<Current directory>\Tsoe.exe
C:\RCX3.tmp
%TEMP%\SiEwMwsU.bat
%TEMP%\OqQYAIQU.bat
%TEMP%\file.vbs
<Current directory>\wIQU.ico
%TEMP%\aQkccEEk.bat
<Current directory>\aaco.ico
<Current directory>\cMEU.exe
<Current directory>\xOcg.ico
<Current directory>\CQAw.exe
C:\RCX4.tmp
C:\RCX2.tmp
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
<Current directory>\PsgU.ico
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\LGAcIEUY.bat
%TEMP%\YEkUAUco.bat
<Current directory>\yeMM.ico
<Current directory>\scQQ.exe
<Current directory>\VEYO.exe
%TEMP%\VGsEQAYI.bat
C:\RCX1.tmp
<Current directory>\ggEQ.ico
<Current directory>\AsQe.exe
C:\RCX9.tmp
C:\RCX8.tmp
%TEMP%\CSQUMEUc.bat
%TEMP%\ZMcYIAoY.bat
%TEMP%\nIEgAgME.bat
<Current directory>\juMw.ico
%TEMP%\NiUYMYIY.bat
<Current directory>\UQAk.ico
<Current directory>\dMEI.exe
C:\RCXA.tmp
<Current directory>\WgoK.exe
%TEMP%\KOMkUMYk.bat
<Current directory>\VwIE.exe
C:\RCX6.tmp
C:\RCX5.tmp
%TEMP%\oKUkUAAs.bat
<Current directory>\BYYk.ico
%TEMP%\pskcgcAc.bat
<Current directory>\VeQM.ico
%TEMP%\xmMwcYgo.bat
<Current directory>\igYs.ico
<Current directory>\bIEk.exe
C:\RCX7.tmp

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>\rMgo.exe
<Current directory>\QYUM.ico
<Current directory>\Jokg.exe
<Current directory>\lwYg.ico
<Current directory>\iEoi.exe
<Current directory>\gIkM.ico
<Current directory>\QkIC.exe
%TEMP%\AsAkwMIA.bat
<Current directory>\jaEE.ico
<Current directory>\jMYE.exe
%TEMP%\mogUsMkg.bat
<Current directory>\RgAq.exe
<Current directory>\rKsU.ico
<Current directory>\gYgg.exe
<Current directory>\MCsE.ico
<Current directory>\SuQs.ico
<Current directory>\SAgQ.exe
<SYSTEM32>\wbem\Performance\WmiApRpl.ini
<Current directory>\YYEq.exe
<Current directory>\xsUw.ico
<Current directory>\Vokg.exe
<Current directory>\icoI.ico
<Current directory>\yiwI.ico
<Current directory>\NwYk.exe
%TEMP%\QsMMoYYk.bat
<Current directory>\AAAw.ico
<Current directory>\Fcwk.ico
<Current directory>\NUUq.exe
<Current directory>\cKoU.ico
<Current directory>\vwIQ.exe
<Current directory>\xOcg.ico
<Current directory>\CQAw.exe
<Current directory>\wIQU.ico
%TEMP%\aQkccEEk.bat
%TEMP%\KOMkUMYk.bat
<Current directory>\aaco.ico
<Current directory>\cMEU.exe
<Current directory>\Tsoe.exe
<Current directory>\VEYO.exe
%TEMP%\VGsEQAYI.bat
%TEMP%\LGAcIEUY.bat
<Current directory>\PsgU.ico
%TEMP%\OqQYAIQU.bat
<Current directory>\yeMM.ico
<Current directory>\scQQ.exe
<Current directory>\dMEI.exe
<Current directory>\ggEQ.ico
<Current directory>\AsQe.exe
<Current directory>\UQAk.ico
<Current directory>\juMw.ico
<Current directory>\bwIq.exe
%TEMP%\nIEgAgME.bat
%TEMP%\ZMcYIAoY.bat
<Current directory>\bIEk.exe
<Current directory>\BYYk.ico
<Current directory>\VwIE.exe
<Current directory>\igYs.ico
<Current directory>\VeQM.ico
<Current directory>\WgoK.exe
%TEMP%\xmMwcYgo.bat

Moves the following files:

from C:\RCX10.tmp to <Current directory>\rMgo.exe
from C:\RCX11.tmp to <Current directory>\QkIC.exe
from C:\RCX12.tmp to <Current directory>\iEoi.exe
from C:\RCXD.tmp to <Current directory>\RgAq.exe
from C:\RCXE.tmp to <Current directory>\gYgg.exe
from C:\RCXF.tmp to <Current directory>\Jokg.exe
from C:\RCX16.tmp to <Current directory>\SAgQ.exe
from C:\RCX17.tmp to <Current directory>\YYEq.exe
from C:\RCX18.tmp to <Current directory>\Vokg.exe
from C:\RCX13.tmp to <Current directory>\NwYk.exe
from C:\RCX14.tmp to <Current directory>\vwIQ.exe
from C:\RCX15.tmp to <Current directory>\NUUq.exe
from C:\RCX4.tmp to <Current directory>\CQAw.exe
from C:\RCX5.tmp to <Current directory>\cMEU.exe
from C:\RCX6.tmp to <Current directory>\VwIE.exe
from C:\RCX1.tmp to <Current directory>\VEYO.exe
from C:\RCX2.tmp to <Current directory>\scQQ.exe
from C:\RCX3.tmp to <Current directory>\Tsoe.exe
from C:\RCXA.tmp to <Current directory>\dMEI.exe
from C:\RCXB.tmp to <Current directory>\bwIq.exe
from C:\RCXC.tmp to <Current directory>\jMYE.exe
from C:\RCX7.tmp to <Current directory>\bIEk.exe
from C:\RCX8.tmp to <Current directory>\WgoK.exe
from C:\RCX9.tmp to <Current directory>\AsQe.exe

Deletes itself.

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

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