Trojan.DownLoader12.26694

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Userinit' = '<SYSTEM32>\userinit.exe,%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe,'
[<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%\tsIQcUYg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\KIcYAwkU.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\yEUwkkcg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\KsYEcows.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<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>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\dqQQUccA.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

%TEMP%\YsoMMEoU.bat
<Current directory>\XsIK.exe
C:\RCX15.tmp
<Current directory>\WWsM.ico
<Current directory>\BOoQ.ico
<Current directory>\eIoC.exe
C:\RCX14.tmp
<Current directory>\WocI.exe
C:\RCX17.tmp
%TEMP%\yEUwkkcg.bat
<Current directory>\SCIU.ico
<Current directory>\hEEc.ico
<Current directory>\LgMc.exe
C:\RCX16.tmp
C:\RCX10.tmp
<Current directory>\zCoE.ico
<Current directory>\ZsUg.exe
<Current directory>\KoUY.exe
<Current directory>\zkEA.exe
C:\RCXF.tmp
<Current directory>\veYE.ico
<Current directory>\mIAI.ico
<Current directory>\HMwY.exe
C:\RCX13.tmp
C:\RCX12.tmp
C:\RCX11.tmp
<Current directory>\xOcc.ico
<Current directory>\KMEU.exe
<Current directory>\IOwo.ico
C:\RCX1D.tmp
<Current directory>\OOQk.ico
<Current directory>\VAIe.exe
<Current directory>\AUcG.exe
<Current directory>\iAkG.exe
C:\RCX1C.tmp
<Current directory>\MUIU.ico
<Current directory>\GKEk.ico
<Current directory>\iMsO.exe
C:\RCX20.tmp
C:\RCX1F.tmp
C:\RCX1E.tmp
<Current directory>\MmMM.ico
<Current directory>\goMs.exe
C:\RCX19.tmp
<Current directory>\boAs.ico
<Current directory>\tUAE.exe
<Current directory>\nMUc.exe
<Current directory>\mgAm.exe
C:\RCX18.tmp
<Current directory>\ECEA.ico
C:\RCX1B.tmp
%TEMP%\KsYEcows.bat
<Current directory>\PkkM.ico
<Current directory>\XEUK.exe
C:\RCX1A.tmp
%TEMP%\FEwoYMoU.bat
<Current directory>\vKsA.ico
C:\RCX3.tmp
<Current directory>\JWQE.ico
<Current directory>\wsgs.exe
<Current directory>\hcIo.exe
C:\RCX2.tmp
%TEMP%\file.vbs
<Current directory>\wCoc.ico
<Current directory>\daEo.ico
<Current directory>\EsQk.exe
C:\RCX6.tmp
C:\RCX5.tmp
C:\RCX4.tmp
<Current directory>\vsAQ.ico
<Current directory>\YAIW.exe
%TEMP%\fOQYoAEs.bat
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\PCoEYIgQ.bat
<Current directory>\Dwce.exe
%TEMP%\dqQQUccA.bat
<Current directory>\oUEE.ico
<Current directory>\MAEk.ico
<Current directory>\qIkG.exe
C:\RCX1.tmp
%TEMP%\dusAgoEA.bat
<Current directory>\jUUE.exe
C:\RCXC.tmp
<Current directory>\eeAg.ico
%TEMP%\xyoMocAw.bat
<Current directory>\ewMM.exe
C:\RCXB.tmp
<Current directory>\aqIw.ico
%TEMP%\tsIQcUYg.bat
C:\RCXE.tmp
<Current directory>\UAkk.ico
<Current directory>\Ogcu.exe
<Current directory>\HMYs.exe
C:\RCXD.tmp
<Current directory>\NOsU.ico
<Current directory>\ogsE.ico
<Current directory>\oksU.exe
C:\RCX8.tmp
C:\RCX7.tmp
%TEMP%\KIcYAwkU.bat
<Current directory>\sicw.ico
<Current directory>\HAce.exe
<Current directory>\hIsI.exe
C:\RCXA.tmp
<Current directory>\QIoE.ico
<Current directory>\XKMo.ico
<Current directory>\mwMc.ico
<Current directory>\IIck.exe
C:\RCX9.tmp

Deletes the following files:

<Current directory>\WWsM.ico
%TEMP%\YsoMMEoU.bat
<Current directory>\BOoQ.ico
<Current directory>\XsIK.exe
<Current directory>\WocI.exe
<Current directory>\SCIU.ico
<Current directory>\LgMc.exe
<Current directory>\hEEc.ico
<Current directory>\eIoC.exe
<Current directory>\ZsUg.exe
<Current directory>\zCoE.ico
<Current directory>\KoUY.exe
<Current directory>\veYE.ico
<Current directory>\HMwY.exe
<Current directory>\mIAI.ico
<Current directory>\KMEU.exe
<Current directory>\xOcc.ico
<Current directory>\AUcG.exe
<Current directory>\MUIU.ico
<Current directory>\iAkG.exe
<Current directory>\PkkM.ico
<Current directory>\goMs.exe
<Current directory>\MmMM.ico
<Current directory>\VAIe.exe
<Current directory>\OOQk.ico
<Current directory>\vKsA.ico
<Current directory>\nMUc.exe
<Current directory>\ECEA.ico
<Current directory>\mgAm.exe
<Current directory>\IOwo.ico
<Current directory>\boAs.ico
<Current directory>\XEUK.exe
<Current directory>\tUAE.exe
%TEMP%\FEwoYMoU.bat
<Current directory>\vsAQ.ico
%TEMP%\dusAgoEA.bat
<Current directory>\JWQE.ico
<Current directory>\YAIW.exe
<Current directory>\HAce.exe
<Current directory>\sicw.ico
<Current directory>\EsQk.exe
<Current directory>\daEo.ico
<Current directory>\wsgs.exe
<Current directory>\MAEk.ico
%TEMP%\PCoEYIgQ.bat
%TEMP%\fOQYoAEs.bat
<Current directory>\qIkG.exe
<Current directory>\hcIo.exe
<Current directory>\wCoc.ico
<Current directory>\Dwce.exe
<Current directory>\oUEE.ico
<Current directory>\HMYs.exe
<Current directory>\eeAg.ico
<Current directory>\aqIw.ico
%TEMP%\xyoMocAw.bat
<Current directory>\zkEA.exe
<Current directory>\UAkk.ico
<Current directory>\Ogcu.exe
<Current directory>\NOsU.ico
<Current directory>\jUUE.exe
<Current directory>\IIck.exe
<Current directory>\mwMc.ico
<Current directory>\oksU.exe
<Current directory>\ogsE.ico
<Current directory>\ewMM.exe
<Current directory>\QIoE.ico
<Current directory>\hIsI.exe
<Current directory>\XKMo.ico

Moves the following files:

from C:\RCX15.tmp to <Current directory>\XsIK.exe
from C:\RCX16.tmp to <Current directory>\LgMc.exe
from C:\RCX17.tmp to <Current directory>\WocI.exe
from C:\RCX14.tmp to <Current directory>\eIoC.exe
from C:\RCX11.tmp to <Current directory>\ZsUg.exe
from C:\RCX12.tmp to <Current directory>\KMEU.exe
from C:\RCX13.tmp to <Current directory>\HMwY.exe
from C:\RCX18.tmp to <Current directory>\mgAm.exe
from C:\RCX1D.tmp to <Current directory>\AUcG.exe
from C:\RCX1E.tmp to <Current directory>\VAIe.exe
from C:\RCX1F.tmp to <Current directory>\goMs.exe
from C:\RCX1C.tmp to <Current directory>\iAkG.exe
from C:\RCX19.tmp to <Current directory>\nMUc.exe
from C:\RCX1A.tmp to <Current directory>\tUAE.exe
from C:\RCX1B.tmp to <Current directory>\XEUK.exe
from C:\RCX10.tmp to <Current directory>\KoUY.exe
from C:\RCX5.tmp to <Current directory>\YAIW.exe
from C:\RCX6.tmp to <Current directory>\EsQk.exe
from C:\RCX7.tmp to <Current directory>\HAce.exe
from C:\RCX4.tmp to <Current directory>\wsgs.exe
from C:\RCX1.tmp to <Current directory>\qIkG.exe
from C:\RCX2.tmp to <Current directory>\Dwce.exe
from C:\RCX3.tmp to <Current directory>\hcIo.exe
from C:\RCX8.tmp to <Current directory>\oksU.exe
from C:\RCXD.tmp to <Current directory>\HMYs.exe
from C:\RCXE.tmp to <Current directory>\Ogcu.exe
from C:\RCXF.tmp to <Current directory>\zkEA.exe
from C:\RCXC.tmp to <Current directory>\jUUE.exe
from C:\RCX9.tmp to <Current directory>\IIck.exe
from C:\RCXA.tmp to <Current directory>\hIsI.exe
from C:\RCXB.tmp to <Current directory>\ewMM.exe

Network activity:

Connects to:

'74.##5.232.51':80
'bl##k.io':443

TCP:

HTTP GET requests:

74.##5.232.51/

UDP:

DNS ASK google.com
DNS ASK bl##k.io

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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