Trojan.DownLoader12.31808

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%\uYgssoYY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UYgkUUoA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\pCMcEsIg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\nogUkcwc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\aaQcQEok.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ueEggsgs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UeEIoYUI.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%\eKAQAkYY.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\jYIokcEY.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\oQQA.exe
C:\RCX13.tmp
%TEMP%\nogUkcwc.bat
<Current directory>\quUk.ico
<Current directory>\CwAE.exe
C:\RCX12.tmp
%TEMP%\OOkEUEMg.bat
<Current directory>\ZCAA.ico
C:\RCX15.tmp
%TEMP%\aGYcIgkc.bat
<Current directory>\guMU.ico
<Current directory>\RIQe.exe
<Current directory>\acoQ.exe
C:\RCX14.tmp
<Current directory>\dgIo.ico
C:\RCXE.tmp
<Current directory>\VWIg.ico
<Current directory>\ngUa.exe
<Current directory>\ygUe.exe
C:\RCXD.tmp
%TEMP%\aaQcQEok.bat
<Current directory>\XUEE.ico
C:\RCXF.tmp
<Current directory>\BIIw.exe
C:\RCX11.tmp
<Current directory>\gIIo.ico
<Current directory>\foMU.ico
<Current directory>\xScA.ico
<Current directory>\EUsO.exe
C:\RCX10.tmp
<Current directory>\XQog.exe
C:\RCX1C.tmp
<Current directory>\NiYQ.ico
<Current directory>\DgcQ.ico
<Current directory>\TqwM.ico
<Current directory>\SoME.exe
C:\RCX1B.tmp
<Current directory>\Kgwo.exe
<Current directory>\NckE.ico
<Current directory>\EkQe.exe
C:\RCX1F.tmp
C:\RCX1E.tmp
C:\RCX1D.tmp
<Current directory>\aqgg.ico
<Current directory>\sgoc.exe
<Current directory>\dcYg.exe
C:\RCX17.tmp
<Current directory>\rckM.ico
<Current directory>\EMUw.ico
<Current directory>\RAcW.exe
C:\RCX16.tmp
%TEMP%\rcoEoQUQ.bat
<Current directory>\JwYI.exe
<Current directory>\TucI.ico
<Current directory>\nMcs.exe
C:\RCX1A.tmp
C:\RCX19.tmp
C:\RCX18.tmp
<Current directory>\qmsI.ico
<Current directory>\jIgG.exe
C:\RCX2.tmp
%TEMP%\pCMcEsIg.bat
%TEMP%\KuIsQgwo.bat
%TEMP%\LGoYcAwM.bat
%TEMP%\gEAcAooQ.bat
%TEMP%\UeEIoYUI.bat
<Current directory>\DogA.exe
<Current directory>\wQIA.ico
<Current directory>\OAok.exe
%TEMP%\gmgUQQkU.bat
C:\RCX4.tmp
<Current directory>\UewU.ico
<Current directory>\DYYU.exe
%TEMP%\UYgkUUoA.bat
C:\RCX3.tmp
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
<Current directory>\JGUU.ico
%TEMP%\quwgIsYk.bat
%ALLUSERSPROFILE%\casg.txt
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
<Current directory>\<Virus name>
%TEMP%\rwMUksgQ.bat
<Current directory>\QsoQ.ico
%TEMP%\eKAQAkYY.bat
%TEMP%\file.vbs
<Current directory>\zoko.exe
C:\RCX1.tmp
%TEMP%\jYIokcEY.bat
<Current directory>\dAMQ.exe
C:\RCXA.tmp
<Current directory>\kwIQ.ico
<Current directory>\oYwQ.ico
<Current directory>\xigU.ico
<Current directory>\mAkm.exe
C:\RCX9.tmp
<Current directory>\bMAy.exe
C:\RCXC.tmp
<Current directory>\ZSQk.ico
<Current directory>\Akkq.exe
<Current directory>\sMII.exe
C:\RCXB.tmp
%TEMP%\CSwIIkgk.bat
<Current directory>\kQUc.ico
<Current directory>\LQIM.ico
<Current directory>\LEIs.exe
%TEMP%\yckoAsQE.bat
C:\RCX5.tmp
%TEMP%\uYgssoYY.bat
<Current directory>\vaMY.ico
<Current directory>\EwEC.exe
C:\RCX6.tmp
<Current directory>\MiEw.ico
<Current directory>\LkgC.exe
C:\RCX8.tmp
C:\RCX7.tmp
%TEMP%\ueEggsgs.bat
<Current directory>\heYU.ico
<Current directory>\vsgk.exe

Deletes the following files:

<Current directory>\acoQ.exe
<Current directory>\ZCAA.ico
<Current directory>\oQQA.exe
<Current directory>\quUk.ico
<Current directory>\RIQe.exe
<Current directory>\RAcW.exe
<Current directory>\guMU.ico
<Current directory>\dgIo.ico
%TEMP%\aGYcIgkc.bat
<Current directory>\EUsO.exe
<Current directory>\xScA.ico
<Current directory>\ngUa.exe
<Current directory>\VWIg.ico
<Current directory>\BIIw.exe
<Current directory>\gIIo.ico
%TEMP%\OOkEUEMg.bat
<Current directory>\foMU.ico
<Current directory>\CwAE.exe
<Current directory>\DgcQ.ico
<Current directory>\Kgwo.exe
<Current directory>\TqwM.ico
<Current directory>\XQog.exe
<Current directory>\NiYQ.ico
<Current directory>\EkQe.exe
<Current directory>\NckE.ico
<Current directory>\sgoc.exe
<Current directory>\aqgg.ico
<Current directory>\JwYI.exe
<Current directory>\rckM.ico
<Current directory>\dcYg.exe
<Current directory>\EMUw.ico
<Current directory>\jIgG.exe
<Current directory>\TucI.ico
<Current directory>\SoME.exe
<Current directory>\qmsI.ico
<Current directory>\nMcs.exe
%TEMP%\gmgUQQkU.bat
<Current directory>\OAok.exe
<Current directory>\DYYU.exe
<Current directory>\wQIA.ico
<Current directory>\UewU.ico
%TEMP%\yckoAsQE.bat
<Current directory>\LEIs.exe
<Current directory>\EwEC.exe
<Current directory>\vaMY.ico
<Current directory>\JGUU.ico
%TEMP%\rwMUksgQ.bat
%TEMP%\quwgIsYk.bat
<Current directory>\zoko.exe
%TEMP%\gEAcAooQ.bat
<Current directory>\QsoQ.ico
%TEMP%\KuIsQgwo.bat
%TEMP%\LGoYcAwM.bat
<Current directory>\DogA.exe
%TEMP%\CSwIIkgk.bat
<Current directory>\sMII.exe
<Current directory>\bMAy.exe
<Current directory>\kwIQ.ico
<Current directory>\kQUc.ico
<Current directory>\ygUe.exe
<Current directory>\XUEE.ico
<Current directory>\Akkq.exe
<Current directory>\ZSQk.ico
<Current directory>\heYU.ico
<Current directory>\LkgC.exe
<Current directory>\LQIM.ico
<Current directory>\vsgk.exe
<Current directory>\MiEw.ico
<Current directory>\dAMQ.exe
<Current directory>\oYwQ.ico
<Current directory>\mAkm.exe
<Current directory>\xigU.ico

Moves the following files:

from C:\RCX15.tmp to <Current directory>\RIQe.exe
from C:\RCX16.tmp to <Current directory>\RAcW.exe
from C:\RCX17.tmp to <Current directory>\dcYg.exe
from C:\RCX14.tmp to <Current directory>\acoQ.exe
from C:\RCX11.tmp to <Current directory>\BIIw.exe
from C:\RCX12.tmp to <Current directory>\CwAE.exe
from C:\RCX13.tmp to <Current directory>\oQQA.exe
from C:\RCX18.tmp to <Current directory>\JwYI.exe
from C:\RCX1D.tmp to <Current directory>\Kgwo.exe
from C:\RCX1E.tmp to <Current directory>\sgoc.exe
from C:\RCX1F.tmp to <Current directory>\EkQe.exe
from C:\RCX1C.tmp to <Current directory>\XQog.exe
from C:\RCX19.tmp to <Current directory>\jIgG.exe
from C:\RCX1A.tmp to <Current directory>\nMcs.exe
from C:\RCX1B.tmp to <Current directory>\SoME.exe
from C:\RCX10.tmp to <Current directory>\EUsO.exe
from C:\RCX5.tmp to <Current directory>\EwEC.exe
from C:\RCX6.tmp to <Current directory>\LEIs.exe
from C:\RCX7.tmp to <Current directory>\vsgk.exe
from C:\RCX4.tmp to <Current directory>\OAok.exe
from C:\RCX1.tmp to <Current directory>\zoko.exe
from C:\RCX2.tmp to <Current directory>\DogA.exe
from C:\RCX3.tmp to <Current directory>\DYYU.exe
from C:\RCX8.tmp to <Current directory>\LkgC.exe
from C:\RCXD.tmp to <Current directory>\Akkq.exe
from C:\RCXE.tmp to <Current directory>\ygUe.exe
from C:\RCXF.tmp to <Current directory>\ngUa.exe
from C:\RCXC.tmp to <Current directory>\sMII.exe
from C:\RCX9.tmp to <Current directory>\mAkm.exe
from C:\RCXA.tmp to <Current directory>\dAMQ.exe
from C:\RCXB.tmp to <Current directory>\bMAy.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: 'jaQEcQMQ.exe'
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: 'Microsoft Windows'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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