Trojan.DownLoader12.26693

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%\hCMkAYos.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\qQsUcIYg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\OuUgcAkw.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\wYIYAMEY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\hWEEcgIs.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\JWYgAAsQ.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%\sIwEcwgE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fGgoMooY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\JcQsAUMs.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs

Modifies file system :

Creates the following files:

%TEMP%\hCMkAYos.bat
C:\RCX12.tmp
%TEMP%\wYIYAMEY.bat
%TEMP%\FkQAcUUE.bat
<Current directory>\FoUQ.ico
<Current directory>\CMQC.exe
<Current directory>\WuEM.ico
<Current directory>\zUEG.exe
C:\RCX14.tmp
<Current directory>\tqwE.ico
<Current directory>\jgMc.exe
C:\RCX13.tmp
<Current directory>\DicU.ico
C:\RCX11.tmp
%TEMP%\ZQIIgQYc.bat
<Current directory>\EuEY.ico
<Current directory>\tAEm.exe
<Current directory>\zEwM.ico
<Current directory>\YgQg.exe
C:\RCXE.tmp
C:\RCXF.tmp
C:\RCX10.tmp
<Current directory>\ECsQ.ico
<Current directory>\Kwcg.exe
%TEMP%\qQsUcIYg.bat
<Current directory>\nmEg.ico
<Current directory>\lEYC.exe
<Current directory>\skgA.exe
C:\RCX1A.tmp
%TEMP%\JQgUkwwk.bat
<Current directory>\ooMs.exe
C:\RCX19.tmp
<Current directory>\JgIs.ico
<Current directory>\IiQY.ico
<Current directory>\SkkA.ico
<Current directory>\DsgO.exe
C:\RCX1C.tmp
<Current directory>\xock.exe
C:\RCX1B.tmp
%TEMP%\hWEEcgIs.bat
<Current directory>\bqgs.ico
<Current directory>\WMky.exe
%TEMP%\sCoUEIwQ.bat
C:\RCX16.tmp
<Current directory>\tYkI.exe
C:\RCX15.tmp
<Current directory>\GegE.ico
%TEMP%\JWYgAAsQ.bat
<Current directory>\LYsU.ico
<Current directory>\roMi.exe
C:\RCX18.tmp
<Current directory>\tIEY.ico
<Current directory>\VsoW.exe
C:\RCX17.tmp
C:\RCXD.tmp
<Current directory>\wYIc.exe
C:\RCX3.tmp
<Current directory>\KIMM.ico
C:\RCX2.tmp
%TEMP%\file.vbs
<Current directory>\QyUo.ico
<Current directory>\YkYw.exe
C:\RCX5.tmp
<Current directory>\wqgs.ico
<Current directory>\ewgc.exe
C:\RCX4.tmp
<Current directory>\bUQc.ico
<Current directory>\cMgi.exe
<Current directory>\acQs.exe
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\EAEQMskk.bat
<Current directory>\<Virus name>
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\casg.txt
<Current directory>\ecMw.ico
%TEMP%\fMQAYEgk.bat
%TEMP%\sIwEcwgE.bat
<Current directory>\UKYU.ico
<Current directory>\nMgI.exe
C:\RCX1.tmp
<Current directory>\FYsM.ico
<Current directory>\IYgK.exe
C:\RCXB.tmp
<Current directory>\oIUC.exe
C:\RCXA.tmp
%TEMP%\fGgoMooY.bat
%TEMP%\imkYwcIM.bat
C:\RCXC.tmp
<Current directory>\zOss.ico
<Current directory>\GQEm.exe
<Current directory>\JcUA.ico
<Current directory>\icck.exe
%TEMP%\OuUgcAkw.bat
<Current directory>\Emcs.ico
<Current directory>\bwsC.exe
C:\RCX7.tmp
<Current directory>\iAMc.ico
C:\RCX6.tmp
%TEMP%\VEYgcgwQ.bat
<Current directory>\JMYI.ico
%TEMP%\JcQsAUMs.bat
<Current directory>\Ygwk.exe
C:\RCX9.tmp
%TEMP%\gOAMIYIY.bat
<Current directory>\cUQK.exe
C:\RCX8.tmp
<Current directory>\loIw.ico

Deletes the following files:

<Current directory>\FoUQ.ico
<Current directory>\CMQC.exe
%TEMP%\FkQAcUUE.bat
<Current directory>\jgMc.exe
<Current directory>\DicU.ico
<Current directory>\zUEG.exe
<Current directory>\WuEM.ico
<Current directory>\ECsQ.ico
<Current directory>\tAEm.exe
<Current directory>\zEwM.ico
%TEMP%\ZQIIgQYc.bat
<Current directory>\EuEY.ico
<Current directory>\Kwcg.exe
<Current directory>\nmEg.ico
<Current directory>\lEYC.exe
<Current directory>\tYkI.exe
<Current directory>\skgA.exe
<Current directory>\bqgs.ico
<Current directory>\ooMs.exe
<Current directory>\JgIs.ico
<Current directory>\IiQY.ico
<Current directory>\xock.exe
%TEMP%\JQgUkwwk.bat
<Current directory>\LYsU.ico
<Current directory>\WMky.exe
%TEMP%\sCoUEIwQ.bat
<Current directory>\tqwE.ico
<Current directory>\GegE.ico
<Current directory>\roMi.exe
<Current directory>\tIEY.ico
<Current directory>\VsoW.exe
<Current directory>\YgQg.exe
<Current directory>\cMgi.exe
<Current directory>\KIMM.ico
<Current directory>\YkYw.exe
<Current directory>\bUQc.ico
%TEMP%\VEYgcgwQ.bat
<Current directory>\wqgs.ico
<Current directory>\ewgc.exe
<Current directory>\QyUo.ico
<Current directory>\UKYU.ico
<Current directory>\nMgI.exe
%TEMP%\EAEQMskk.bat
%TEMP%\fMQAYEgk.bat
<Current directory>\wYIc.exe
<Current directory>\ecMw.ico
<Current directory>\acQs.exe
<Current directory>\bwsC.exe
%TEMP%\imkYwcIM.bat
<Current directory>\FYsM.ico
<Current directory>\IYgK.exe
<Current directory>\icck.exe
<Current directory>\zOss.ico
<Current directory>\GQEm.exe
<Current directory>\JcUA.ico
<Current directory>\Emcs.ico
<Current directory>\iAMc.ico
<Current directory>\cUQK.exe
<Current directory>\JMYI.ico
<Current directory>\Ygwk.exe
<Current directory>\oIUC.exe
%TEMP%\gOAMIYIY.bat
<Current directory>\loIw.ico

Moves the following files:

from C:\RCX12.tmp to <Current directory>\CMQC.exe
from C:\RCX13.tmp to <Current directory>\jgMc.exe
from C:\RCX14.tmp to <Current directory>\zUEG.exe
from C:\RCXF.tmp to <Current directory>\tAEm.exe
from C:\RCX10.tmp to <Current directory>\lEYC.exe
from C:\RCX11.tmp to <Current directory>\Kwcg.exe
from C:\RCX15.tmp to <Current directory>\tYkI.exe
from C:\RCX19.tmp to <Current directory>\ooMs.exe
from C:\RCX1A.tmp to <Current directory>\skgA.exe
from C:\RCX1B.tmp to <Current directory>\xock.exe
from C:\RCX16.tmp to <Current directory>\WMky.exe
from C:\RCX17.tmp to <Current directory>\VsoW.exe
from C:\RCX18.tmp to <Current directory>\roMi.exe
from C:\RCXE.tmp to <Current directory>\YgQg.exe
from C:\RCX4.tmp to <Current directory>\YkYw.exe
from C:\RCX5.tmp to <Current directory>\cMgi.exe
from C:\RCX6.tmp to <Current directory>\ewgc.exe
from C:\RCX1.tmp to <Current directory>\nMgI.exe
from C:\RCX2.tmp to <Current directory>\acQs.exe
from C:\RCX3.tmp to <Current directory>\wYIc.exe
from C:\RCX7.tmp to <Current directory>\bwsC.exe
from C:\RCXB.tmp to <Current directory>\IYgK.exe
from C:\RCXC.tmp to <Current directory>\icck.exe
from C:\RCXD.tmp to <Current directory>\GQEm.exe
from C:\RCX8.tmp to <Current directory>\cUQK.exe
from C:\RCX9.tmp to <Current directory>\Ygwk.exe
from C:\RCXA.tmp to <Current directory>\oIUC.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: 'jaQEcQMQ.exe'
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: 'Microsoft Windows'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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