Trojan.DownLoader12.5963

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%\ZEsMEkUA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\rSkMoEAM.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\FSoYgQkY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\Nmwckgwg.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\jigMwIoQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\WOYIEswI.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%\JacIMIoo.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\FmoIccUc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\CiwgsYIs.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs

Modifies file system :

Creates the following files:

C:\RCX10.tmp
%TEMP%\WOYIEswI.bat
<Current directory>\VKwc.ico
C:\RCXF.tmp
<Current directory>\pwoM.ico
<Current directory>\gMEk.exe
<Current directory>\BEEQ.exe
%TEMP%\LuYcQMUc.bat
C:\RCX12.tmp
<Current directory>\kWEQ.ico
C:\RCX11.tmp
<Current directory>\jwYM.ico
<Current directory>\ucYo.exe
C:\RCXC.tmp
%TEMP%\BGUUYIUY.bat
<Current directory>\HiEU.ico
C:\RCXB.tmp
<Current directory>\CaUA.ico
<Current directory>\uwIs.exe
<Current directory>\IoUG.exe
C:\RCXE.tmp
<Current directory>\nIYI.ico
<Current directory>\gMQg.exe
C:\RCXD.tmp
<Current directory>\twkI.ico
<Current directory>\NwEI.exe
C:\RCX17.tmp
<Current directory>\cmUg.ico
<Current directory>\fIks.exe
C:\RCX16.tmp
<Current directory>\wccM.ico
<Current directory>\yosg.exe
C:\RCX18.tmp
<Current directory>\SUUI.ico
<Current directory>\IMAS.exe
%TEMP%\jigMwIoQ.bat
<Current directory>\lqII.ico
<Current directory>\wQMu.exe
C:\RCX19.tmp
<Current directory>\sYcs.ico
%TEMP%\MGUYwAII.bat
<Current directory>\fYsS.exe
<Current directory>\zcAu.exe
C:\RCX13.tmp
%TEMP%\JuYMAQIc.bat
C:\RCX14.tmp
C:\RCX15.tmp
<Current directory>\dOkI.ico
<Current directory>\WEoo.exe
<Current directory>\JQUA.ico
%TEMP%\tqAAAUcY.bat
<Current directory>\YoIm.exe
<Current directory>\tCcg.ico
%TEMP%\FSoYgQkY.bat
%TEMP%\ogYgcQMk.bat
C:\RCX1.tmp
%TEMP%\FmoIccUc.bat
%TEMP%\NcYEAQUs.bat
%TEMP%\rSkMoEAM.bat
<Current directory>\Esoq.exe
C:\RCX3.tmp
%TEMP%\baYAIIco.bat
<Current directory>\YskC.exe
C:\RCX2.tmp
<Current directory>\aAkk.ico
<Current directory>\<Virus name>
%TEMP%\YMoEUAck.bat
%TEMP%\JacIMIoo.bat
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\cykcEYsw.bat
%TEMP%\osMsckwE.bat
<Current directory>\NwgE.ico
%TEMP%\AIAgkEkY.bat
<Current directory>\OgIw.exe
%TEMP%\file.vbs
%ALLUSERSPROFILE%\casg.txt
%TEMP%\CiwgsYIs.bat
C:\RCX8.tmp
<Current directory>\AiAQ.ico
<Current directory>\hIcM.exe
%TEMP%\HsoQkksM.bat
<Current directory>\JQUY.ico
<Current directory>\xoEm.exe
C:\RCX9.tmp
C:\RCXA.tmp
<Current directory>\WcAc.ico
<Current directory>\asEg.exe
%TEMP%\Nmwckgwg.bat
<Current directory>\boYk.ico
<Current directory>\HAMo.exe
<Current directory>\IIAY.ico
<Current directory>\BwMw.exe
C:\RCX5.tmp
<Current directory>\pqIQ.ico
<Current directory>\dwUw.exe
C:\RCX4.tmp
%TEMP%\ZEsMEkUA.bat
<Current directory>\CsAA.ico
<Current directory>\pUku.exe
C:\RCX7.tmp
<Current directory>\VIIM.ico
<Current directory>\AYME.exe
C:\RCX6.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>\VKwc.ico
%TEMP%\LuYcQMUc.bat
<Current directory>\pwoM.ico
<Current directory>\BEEQ.exe
<Current directory>\zcAu.exe
<Current directory>\kWEQ.ico
<Current directory>\ucYo.exe
<Current directory>\jwYM.ico
%TEMP%\BGUUYIUY.bat
<Current directory>\NwEI.exe
<Current directory>\IoUG.exe
<Current directory>\HiEU.ico
<Current directory>\nIYI.ico
<Current directory>\gMEk.exe
<Current directory>\twkI.ico
<Current directory>\gMQg.exe
<Current directory>\cmUg.ico
<Current directory>\wQMu.exe
<Current directory>\wccM.ico
<Current directory>\fIks.exe
<SYSTEM32>\wbem\Performance\WmiApRpl.ini
<SYSTEM32>\PerfStringBackup.TMP
<Current directory>\lqII.ico
<Current directory>\SUUI.ico
<Current directory>\sYcs.ico
<Current directory>\YoIm.exe
%TEMP%\MGUYwAII.bat
<Current directory>\fYsS.exe
<Current directory>\dOkI.ico
<Current directory>\yosg.exe
<Current directory>\JQUA.ico
<Current directory>\WEoo.exe
<Current directory>\Esoq.exe
<Current directory>\aAkk.ico
<Current directory>\YskC.exe
<Current directory>\tCcg.ico
<Current directory>\pqIQ.ico
<Current directory>\BwMw.exe
%TEMP%\baYAIIco.bat
<Current directory>\dwUw.exe
%TEMP%\osMsckwE.bat
%TEMP%\AIAgkEkY.bat
%TEMP%\cykcEYsw.bat
%TEMP%\YMoEUAck.bat
%TEMP%\NcYEAQUs.bat
%TEMP%\ogYgcQMk.bat
<Current directory>\OgIw.exe
<Current directory>\NwgE.ico
<Current directory>\HAMo.exe
<Current directory>\boYk.ico
<Current directory>\hIcM.exe
<Current directory>\AiAQ.ico
<Current directory>\uwIs.exe
<Current directory>\CaUA.ico
<Current directory>\asEg.exe
<Current directory>\WcAc.ico
<Current directory>\VIIM.ico
<Current directory>\pUku.exe
<Current directory>\IIAY.ico
<Current directory>\AYME.exe
<Current directory>\xoEm.exe
<Current directory>\JQUY.ico
<Current directory>\CsAA.ico
%TEMP%\HsoQkksM.bat

Moves the following files:

from C:\RCX11.tmp to <Current directory>\BEEQ.exe
from C:\RCX12.tmp to <Current directory>\ucYo.exe
from C:\RCX13.tmp to <Current directory>\zcAu.exe
from C:\RCXE.tmp to <Current directory>\NwEI.exe
from C:\RCXF.tmp to <Current directory>\gMQg.exe
from C:\RCX10.tmp to <Current directory>\gMEk.exe
from C:\RCX17.tmp to <Current directory>\yosg.exe
from C:\RCX18.tmp to <Current directory>\fIks.exe
from C:\RCX19.tmp to <Current directory>\wQMu.exe
from C:\RCX14.tmp to <Current directory>\fYsS.exe
from C:\RCX15.tmp to <Current directory>\YoIm.exe
from C:\RCX16.tmp to <Current directory>\WEoo.exe
from C:\RCXD.tmp to <Current directory>\IoUG.exe
from C:\RCX4.tmp to <Current directory>\dwUw.exe
from C:\RCX5.tmp to <Current directory>\BwMw.exe
from C:\RCX6.tmp to <Current directory>\AYME.exe
from C:\RCX1.tmp to <Current directory>\OgIw.exe
from C:\RCX2.tmp to <Current directory>\YskC.exe
from C:\RCX3.tmp to <Current directory>\Esoq.exe
from C:\RCXA.tmp to <Current directory>\HAMo.exe
from C:\RCXB.tmp to <Current directory>\asEg.exe
from C:\RCXC.tmp to <Current directory>\uwIs.exe
from C:\RCX7.tmp to <Current directory>\pUku.exe
from C:\RCX8.tmp to <Current directory>\xoEm.exe
from C:\RCX9.tmp to <Current directory>\hIcM.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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