Trojan.DownLoader12.32874

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%\ukQUksgI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\NAIQksAs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ccsMsYYk.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\aOoAMIwY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\YksMgcEE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\VaAcAIcs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\dUAcMccM.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%\riAYsQAw.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\NIIwIAYg.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

C:\RCXF.tmp
<Current directory>\ayIU.ico
<Current directory>\VYoC.exe
%TEMP%\YksMgcEE.bat
<Current directory>\Gico.ico
<Current directory>\cMMu.exe
<Current directory>\iAAE.exe
%TEMP%\aOoAMIwY.bat
C:\RCX11.tmp
C:\RCX10.tmp
%TEMP%\lCEIIIIY.bat
<Current directory>\XQEs.ico
C:\RCXE.tmp
%TEMP%\VaAcAIcs.bat
<Current directory>\goAs.exe
C:\RCXC.tmp
C:\RCXB.tmp
%TEMP%\XoAUgUMA.bat
<Current directory>\LUcA.ico
%TEMP%\EYEAcYUw.bat
<Current directory>\CAos.ico
<Current directory>\JgkC.exe
<Current directory>\wckE.ico
<Current directory>\CUEU.exe
C:\RCXD.tmp
<Current directory>\zoUs.ico
C:\RCX17.tmp
<Current directory>\ywsM.ico
<Current directory>\eQYk.exe
C:\RCX16.tmp
<Current directory>\WOoA.ico
<Current directory>\HIQQ.exe
C:\RCX19.tmp
<Current directory>\JWco.ico
<Current directory>\eEMw.exe
C:\RCX18.tmp
<Current directory>\UkkE.ico
<Current directory>\KMYA.exe
<Current directory>\UsYO.exe
<Current directory>\cgEG.exe
C:\RCX13.tmp
<Current directory>\ZqcA.ico
<Current directory>\SAkU.exe
C:\RCX12.tmp
<Current directory>\okwU.ico
<Current directory>\TooA.exe
C:\RCX15.tmp
<Current directory>\nSIU.ico
<Current directory>\vwIS.exe
C:\RCX14.tmp
<Current directory>\KQEI.ico
C:\RCX2.tmp
<Current directory>\aCAM.ico
<Current directory>\coYo.exe
%TEMP%\IGIwwssk.bat
%TEMP%\riAYsQAw.bat
<Current directory>\NwYg.exe
<Current directory>\ogwS.exe
C:\RCX4.tmp
%TEMP%\dUAcMccM.bat
C:\RCX3.tmp
%TEMP%\euUskYgc.bat
<Current directory>\VWos.ico
<Current directory>\UAoA.ico
%ALLUSERSPROFILE%\casg.txt
<Current directory>\ZQMA.ico
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
C:\RCX1.tmp
%TEMP%\NIIwIAYg.bat
%TEMP%\file.vbs
%TEMP%\iqoUsQos.bat
<Current directory>\<Virus name>
<Current directory>\NsMW.exe
<Current directory>\zWMk.ico
<Current directory>\tSsg.ico
<Current directory>\PMkO.exe
%TEMP%\ukQUksgI.bat
C:\RCX8.tmp
%TEMP%\NAIQksAs.bat
%TEMP%\oWkIMocs.bat
C:\RCXA.tmp
<Current directory>\KWsI.ico
<Current directory>\KEQu.exe
C:\RCX9.tmp
<Current directory>\fQgA.ico
<Current directory>\tAEa.exe
<Current directory>\DowO.exe
<Current directory>\ggsk.exe
C:\RCX6.tmp
%TEMP%\wmssIoAU.bat
<Current directory>\jEEG.exe
C:\RCX5.tmp
<Current directory>\zYsc.ico
%TEMP%\ccsMsYYk.bat
%TEMP%\HEsYEIYk.bat
<Current directory>\pKUU.ico
<Current directory>\SQQs.ico
<Current directory>\hMQA.exe
C:\RCX7.tmp

Deletes the following files:

<Current directory>\ayIU.ico
<Current directory>\VYoC.exe
%TEMP%\lCEIIIIY.bat
<Current directory>\iAAE.exe
<Current directory>\zoUs.ico
<Current directory>\SAkU.exe
<Current directory>\XQEs.ico
<Current directory>\Gico.ico
<Current directory>\wckE.ico
<Current directory>\CUEU.exe
<Current directory>\LUcA.ico
%TEMP%\EYEAcYUw.bat
<Current directory>\cMMu.exe
<Current directory>\CAos.ico
<Current directory>\JgkC.exe
<Current directory>\eQYk.exe
<Current directory>\WOoA.ico
<Current directory>\HIQQ.exe
<Current directory>\ywsM.ico
<Current directory>\JWco.ico
<Current directory>\UkkE.ico
<Current directory>\KMYA.exe
<Current directory>\nSIU.ico
<Current directory>\vwIS.exe
<Current directory>\okwU.ico
<Current directory>\cgEG.exe
<Current directory>\ZqcA.ico
<Current directory>\UsYO.exe
<Current directory>\KQEI.ico
<Current directory>\TooA.exe
<Current directory>\VWos.ico
<Current directory>\ogwS.exe
%TEMP%\euUskYgc.bat
<Current directory>\jEEG.exe
<Current directory>\ggsk.exe
%TEMP%\wmssIoAU.bat
<Current directory>\zWMk.ico
<Current directory>\aCAM.ico
<Current directory>\ZQMA.ico
<Current directory>\NsMW.exe
%TEMP%\iqoUsQos.bat
%TEMP%\IGIwwssk.bat
<Current directory>\coYo.exe
<Current directory>\UAoA.ico
<Current directory>\NwYg.exe
<Current directory>\fQgA.ico
<Current directory>\tAEa.exe
<Current directory>\tSsg.ico
%TEMP%\XoAUgUMA.bat
<Current directory>\goAs.exe
<Current directory>\KWsI.ico
<Current directory>\KEQu.exe
<Current directory>\PMkO.exe
<Current directory>\SQQs.ico
<Current directory>\hMQA.exe
<Current directory>\zYsc.ico
%TEMP%\HEsYEIYk.bat
%TEMP%\oWkIMocs.bat
<Current directory>\pKUU.ico
<Current directory>\DowO.exe

Moves the following files:

from C:\RCX11.tmp to <Current directory>\iAAE.exe
from C:\RCX12.tmp to <Current directory>\SAkU.exe
from C:\RCX13.tmp to <Current directory>\cgEG.exe
from C:\RCXE.tmp to <Current directory>\JgkC.exe
from C:\RCXF.tmp to <Current directory>\cMMu.exe
from C:\RCX10.tmp to <Current directory>\VYoC.exe
from C:\RCX17.tmp to <Current directory>\HIQQ.exe
from C:\RCX18.tmp to <Current directory>\eQYk.exe
from C:\RCX19.tmp to <Current directory>\KMYA.exe
from C:\RCX14.tmp to <Current directory>\vwIS.exe
from C:\RCX15.tmp to <Current directory>\TooA.exe
from C:\RCX16.tmp to <Current directory>\UsYO.exe
from C:\RCXD.tmp to <Current directory>\CUEU.exe
from C:\RCX4.tmp to <Current directory>\ogwS.exe
from C:\RCX5.tmp to <Current directory>\jEEG.exe
from C:\RCX6.tmp to <Current directory>\ggsk.exe
from C:\RCX1.tmp to <Current directory>\NsMW.exe
from C:\RCX2.tmp to <Current directory>\NwYg.exe
from C:\RCX3.tmp to <Current directory>\coYo.exe
from C:\RCXA.tmp to <Current directory>\tAEa.exe
from C:\RCXB.tmp to <Current directory>\KEQu.exe
from C:\RCXC.tmp to <Current directory>\goAs.exe
from C:\RCX7.tmp to <Current directory>\hMQA.exe
from C:\RCX8.tmp to <Current directory>\DowO.exe
from C:\RCX9.tmp to <Current directory>\PMkO.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: 'Microsoft Windows'
ClassName: '' WindowName: 'AcIcUcAM.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'jaQEcQMQ.exe'

Tecnologie

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