Trojan.DownLoader12.5998

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%\gkYsUQcE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\TaQsYUYQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\kaUEQAAQ.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\mIwgAUUY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ZWoIEEIs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\uMQQUcsE.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%\RacccsIg.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\OSkwkAgc.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

C:\RCXF.tmp
%TEMP%\MOUQQQwk.bat
<Current directory>\yckU.ico
%TEMP%\zyAgYAcE.bat
<Current directory>\sIks.ico
<Current directory>\IAAW.exe
<Current directory>\IEYI.exe
C:\RCX11.tmp
<Current directory>\FQsI.ico
<Current directory>\KQYw.exe
C:\RCX10.tmp
<Current directory>\VagM.ico
C:\RCXE.tmp
%TEMP%\gkYsUQcE.bat
<Current directory>\cEIA.ico
<Current directory>\uYMq.exe
<Current directory>\wosy.exe
C:\RCXC.tmp
%TEMP%\HMgsoocs.bat
%TEMP%\mIwgAUUY.bat
<Current directory>\yYgM.ico
<Current directory>\Pwgm.exe
%TEMP%\cwkIAokc.bat
%TEMP%\ZWoIEEIs.bat
C:\RCXD.tmp
C:\RCX17.tmp
<Current directory>\MKEg.ico
<Current directory>\Asso.exe
C:\RCX16.tmp
<Current directory>\tEQM.ico
<Current directory>\AkUC.exe
C:\RCX19.tmp
<Current directory>\ecAc.ico
<Current directory>\EwgY.exe
C:\RCX18.tmp
<Current directory>\uwYk.ico
<Current directory>\yswC.exe
<Current directory>\aMYm.exe
<Current directory>\dwku.exe
C:\RCX13.tmp
<Current directory>\HQwk.ico
<Current directory>\wAsc.exe
C:\RCX12.tmp
<Current directory>\geAY.ico
<Current directory>\uUgY.exe
C:\RCX15.tmp
<Current directory>\WwMs.ico
<Current directory>\ccQK.exe
C:\RCX14.tmp
<Current directory>\hoUo.ico
<Current directory>\oOkw.ico
C:\RCX3.tmp
%TEMP%\file.vbs
<Current directory>\vSAw.ico
C:\RCX2.tmp
<Current directory>\ScgU.ico
<Current directory>\cEYI.exe
<Current directory>\kIce.exe
%TEMP%\dIAwYoQY.bat
%TEMP%\RacccsIg.bat
<Current directory>\IYcw.exe
C:\RCX4.tmp
<Current directory>\mkwM.ico
<Current directory>\wgEI.exe
<Current directory>\<Virus name>
%TEMP%\Ncoccsgk.bat
%ALLUSERSPROFILE%\casg.txt
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\SqEkoYMI.bat
<Current directory>\bswe.exe
C:\RCX1.tmp
<Current directory>\YWsY.ico
%TEMP%\OSkwkAgc.bat
<Current directory>\tEMM.ico
%TEMP%\tIEAUsoQ.bat
%TEMP%\zwQcIUAU.bat
<Current directory>\lAIM.ico
%TEMP%\TaQsYUYQ.bat
<Current directory>\JwAo.ico
<Current directory>\JIQa.exe
C:\RCX9.tmp
<Current directory>\BAEm.exe
C:\RCXB.tmp
%TEMP%\HkAsgUMs.bat
<Current directory>\vYYM.exe
C:\RCXA.tmp
<Current directory>\CgUg.ico
%TEMP%\kaUEQAAQ.bat
C:\RCX6.tmp
%TEMP%\uMQQUcsE.bat
<Current directory>\fKQo.ico
C:\RCX5.tmp
<Current directory>\pIso.ico
<Current directory>\eIwu.exe
<Current directory>\UgoU.ico
<Current directory>\vYAO.exe
C:\RCX8.tmp
<Current directory>\qoEw.exe
C:\RCX7.tmp
%TEMP%\iCoEUQws.bat

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>\yckU.ico
<Current directory>\KQYw.exe
<Current directory>\sIks.ico
<Current directory>\IEYI.exe
<Current directory>\FQsI.ico
<Current directory>\wAsc.exe
<Current directory>\VagM.ico
<Current directory>\IAAW.exe
<Current directory>\uYMq.exe
%TEMP%\cwkIAokc.bat
<Current directory>\oOkw.ico
<Current directory>\cEIA.ico
<Current directory>\yYgM.ico
%TEMP%\zyAgYAcE.bat
<Current directory>\Pwgm.exe
<Current directory>\dwku.exe
<Current directory>\MKEg.ico
<Current directory>\Asso.exe
<Current directory>\tEQM.ico
<Current directory>\yswC.exe
<SYSTEM32>\wbem\Performance\WmiApRpl_new.h
<Current directory>\ecAc.ico
<Current directory>\uwYk.ico
<Current directory>\AkUC.exe
<Current directory>\HQwk.ico
<Current directory>\ccQK.exe
<Current directory>\geAY.ico
<Current directory>\uUgY.exe
<Current directory>\WwMs.ico
<Current directory>\aMYm.exe
<Current directory>\hoUo.ico
<Current directory>\vSAw.ico
<Current directory>\IYcw.exe
<Current directory>\ScgU.ico
%TEMP%\dIAwYoQY.bat
<Current directory>\eIwu.exe
<Current directory>\mkwM.ico
<Current directory>\kIce.exe
<Current directory>\cEYI.exe
<Current directory>\bswe.exe
%TEMP%\Ncoccsgk.bat
%TEMP%\SqEkoYMI.bat
<Current directory>\tEMM.ico
<Current directory>\YWsY.ico
<Current directory>\wgEI.exe
%TEMP%\tIEAUsoQ.bat
<Current directory>\pIso.ico
<Current directory>\BAEm.exe
<Current directory>\lAIM.ico
<Current directory>\vYYM.exe
%TEMP%\HkAsgUMs.bat
<Current directory>\wosy.exe
%TEMP%\HMgsoocs.bat
<Current directory>\CgUg.ico
<Current directory>\JwAo.ico
%TEMP%\iCoEUQws.bat
<Current directory>\fKQo.ico
<Current directory>\qoEw.exe
<Current directory>\vYAO.exe
<Current directory>\JIQa.exe
%TEMP%\zwQcIUAU.bat
<Current directory>\UgoU.ico

Moves the following files:

from C:\RCX11.tmp to <Current directory>\IEYI.exe
from C:\RCX12.tmp to <Current directory>\wAsc.exe
from C:\RCX13.tmp to <Current directory>\dwku.exe
from C:\RCXE.tmp to <Current directory>\Pwgm.exe
from C:\RCXF.tmp to <Current directory>\IAAW.exe
from C:\RCX10.tmp to <Current directory>\KQYw.exe
from C:\RCX17.tmp to <Current directory>\AkUC.exe
from C:\RCX18.tmp to <Current directory>\Asso.exe
from C:\RCX19.tmp to <Current directory>\yswC.exe
from C:\RCX14.tmp to <Current directory>\ccQK.exe
from C:\RCX15.tmp to <Current directory>\uUgY.exe
from C:\RCX16.tmp to <Current directory>\aMYm.exe
from C:\RCXD.tmp to <Current directory>\uYMq.exe
from C:\RCX4.tmp to <Current directory>\IYcw.exe
from C:\RCX5.tmp to <Current directory>\kIce.exe
from C:\RCX6.tmp to <Current directory>\eIwu.exe
from C:\RCX1.tmp to <Current directory>\bswe.exe
from C:\RCX2.tmp to <Current directory>\wgEI.exe
from C:\RCX3.tmp to <Current directory>\cEYI.exe
from C:\RCXA.tmp to <Current directory>\vYYM.exe
from C:\RCXB.tmp to <Current directory>\BAEm.exe
from C:\RCXC.tmp to <Current directory>\wosy.exe
from C:\RCX7.tmp to <Current directory>\qoEw.exe
from C:\RCX8.tmp to <Current directory>\vYAO.exe
from C:\RCX9.tmp to <Current directory>\JIQa.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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