Trojan.DownLoader12.32937

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%\nGsMUkcg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ZmscswkU.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\HiYwoEQs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\IaoAckAI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\aikAgMII.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\lmwIkckM.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\dUcEMwoo.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%\xMIQAkwk.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\lyAUcEUU.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

C:\RCXF.tmp
<Current directory>\kMAo.ico
<Current directory>\KUQS.exe
<Current directory>\NeQE.ico
%TEMP%\aikAgMII.bat
<Current directory>\VYwM.exe
<Current directory>\GwQy.exe
C:\RCX11.tmp
%TEMP%\IaoAckAI.bat
C:\RCX10.tmp
<Current directory>\wOUk.ico
%TEMP%\EkMUIcoc.bat
%TEMP%\MqwccMUs.bat
C:\RCXC.tmp
%TEMP%\fQoMcYEQ.bat
<Current directory>\ykYk.ico
C:\RCXB.tmp
<Current directory>\nYMg.ico
<Current directory>\xIYM.exe
<Current directory>\aeEY.ico
<Current directory>\lccu.exe
C:\RCXE.tmp
<Current directory>\YAsK.exe
C:\RCXD.tmp
%TEMP%\lmwIkckM.bat
<Current directory>\KaYk.ico
<Current directory>\oYsU.exe
C:\RCX17.tmp
<Current directory>\IAME.ico
<Current directory>\tIwS.exe
C:\RCX16.tmp
<Current directory>\GaIM.ico
<Current directory>\oEse.exe
C:\RCX19.tmp
<Current directory>\eUsE.ico
<Current directory>\BIkW.exe
C:\RCX18.tmp
C:\RCX15.tmp
<Current directory>\TWQU.ico
<Current directory>\mgAm.exe
C:\RCX13.tmp
<Current directory>\DQQQ.ico
<Current directory>\Pwci.exe
C:\RCX12.tmp
C:\RCX14.tmp
<Current directory>\Eikw.ico
<Current directory>\Kgoi.exe
%TEMP%\EIcAUIEg.bat
<Current directory>\LsEk.ico
<Current directory>\scgC.exe
<Current directory>\MQoG.exe
%TEMP%\dUcEMwoo.bat
<Current directory>\AUsK.exe
C:\RCX2.tmp
<Current directory>\tOYM.ico
%TEMP%\xMIQAkwk.bat
%TEMP%\eiUkgIsE.bat
%TEMP%\HiYwoEQs.bat
C:\RCX3.tmp
%TEMP%\ICssYgks.bat
%TEMP%\aSMQsIQE.bat
<Current directory>\LgQM.ico
<Current directory>\LEwS.exe
%TEMP%\KYwcsUQw.bat
%ALLUSERSPROFILE%\casg.txt
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
<Current directory>\NQEA.ico
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
<Current directory>\TUUM.exe
C:\RCX1.tmp
%TEMP%\file.vbs
%TEMP%\MwAcgEEA.bat
<Current directory>\<Virus name>
%TEMP%\lyAUcEUU.bat
<Current directory>\LIwU.exe
C:\RCX8.tmp
<Current directory>\pmwo.ico
C:\RCX7.tmp
%TEMP%\nGsMUkcg.bat
<Current directory>\lcAM.ico
<Current directory>\UAIs.exe
C:\RCXA.tmp
<Current directory>\OMIY.ico
<Current directory>\PEUW.exe
C:\RCX9.tmp
<Current directory>\xWQk.ico
<Current directory>\MwYo.exe
C:\RCX4.tmp
<Current directory>\PGEM.ico
<Current directory>\kcwc.exe
<Current directory>\coUM.ico
<Current directory>\Hoks.exe
%TEMP%\ZmscswkU.bat
C:\RCX6.tmp
%TEMP%\uuEcoEoA.bat
<Current directory>\WIQI.ico
C:\RCX5.tmp
<Current directory>\pUoo.ico
<Current directory>\ocgQ.exe

Deletes the following files:

%TEMP%\EkMUIcoc.bat
<Current directory>\kMAo.ico
<Current directory>\KUQS.exe
<Current directory>\GwQy.exe
<Current directory>\DQQQ.ico
<Current directory>\Pwci.exe
<Current directory>\wOUk.ico
<Current directory>\NeQE.ico
<Current directory>\ykYk.ico
<Current directory>\YAsK.exe
%TEMP%\fQoMcYEQ.bat
<Current directory>\lccu.exe
<Current directory>\VYwM.exe
<Current directory>\aeEY.ico
%TEMP%\MqwccMUs.bat
<Current directory>\KaYk.ico
<Current directory>\oYsU.exe
<Current directory>\IAME.ico
<Current directory>\BIkW.exe
<Current directory>\GaIM.ico
<Current directory>\oEse.exe
<Current directory>\eUsE.ico
<Current directory>\tIwS.exe
%TEMP%\EIcAUIEg.bat
<Current directory>\TWQU.ico
<Current directory>\mgAm.exe
<Current directory>\scgC.exe
<Current directory>\Eikw.ico
<Current directory>\Kgoi.exe
<Current directory>\LsEk.ico
%TEMP%\ICssYgks.bat
<Current directory>\LgQM.ico
<Current directory>\LEwS.exe
<Current directory>\Hoks.exe
<Current directory>\PGEM.ico
<Current directory>\kcwc.exe
<Current directory>\coUM.ico
<Current directory>\tOYM.ico
<Current directory>\NQEA.ico
<Current directory>\TUUM.exe
%TEMP%\MwAcgEEA.bat
%TEMP%\KYwcsUQw.bat
%TEMP%\aSMQsIQE.bat
<Current directory>\AUsK.exe
%TEMP%\eiUkgIsE.bat
<Current directory>\xWQk.ico
<Current directory>\UAIs.exe
<Current directory>\pmwo.ico
<Current directory>\MQoG.exe
<Current directory>\nYMg.ico
<Current directory>\xIYM.exe
<Current directory>\OMIY.ico
<Current directory>\PEUW.exe
%TEMP%\uuEcoEoA.bat
<Current directory>\pUoo.ico
<Current directory>\ocgQ.exe
<Current directory>\MwYo.exe
<Current directory>\lcAM.ico
<Current directory>\LIwU.exe
<Current directory>\WIQI.ico

Moves the following files:

from C:\RCX11.tmp to <Current directory>\GwQy.exe
from C:\RCX12.tmp to <Current directory>\Pwci.exe
from C:\RCX13.tmp to <Current directory>\mgAm.exe
from C:\RCXE.tmp to <Current directory>\lccu.exe
from C:\RCXF.tmp to <Current directory>\VYwM.exe
from C:\RCX10.tmp to <Current directory>\KUQS.exe
from C:\RCX17.tmp to <Current directory>\oYsU.exe
from C:\RCX18.tmp to <Current directory>\BIkW.exe
from C:\RCX19.tmp to <Current directory>\oEse.exe
from C:\RCX14.tmp to <Current directory>\scgC.exe
from C:\RCX15.tmp to <Current directory>\Kgoi.exe
from C:\RCX16.tmp to <Current directory>\tIwS.exe
from C:\RCXD.tmp to <Current directory>\YAsK.exe
from C:\RCX4.tmp to <Current directory>\Hoks.exe
from C:\RCX5.tmp to <Current directory>\kcwc.exe
from C:\RCX6.tmp to <Current directory>\ocgQ.exe
from C:\RCX1.tmp to <Current directory>\TUUM.exe
from C:\RCX2.tmp to <Current directory>\AUsK.exe
from C:\RCX3.tmp to <Current directory>\LEwS.exe
from C:\RCXA.tmp to <Current directory>\UAIs.exe
from C:\RCXB.tmp to <Current directory>\MQoG.exe
from C:\RCXC.tmp to <Current directory>\xIYM.exe
from C:\RCX7.tmp to <Current directory>\MwYo.exe
from C:\RCX8.tmp to <Current directory>\LIwU.exe
from C:\RCX9.tmp to <Current directory>\PEUW.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: 'AcIcUcAM.exe'
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: 'Microsoft Windows'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'jaQEcQMQ.exe'

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