Trojan.DownLoader12.32961

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%\LagQAQwA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\PCoEcwwM.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\lQIYYMUY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\PScgwckQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UaEwkEwY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DEEkcMok.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\EysEgUQE.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%\CwsMcUAw.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\wMYcIsIM.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\RsAc.ico
<Current directory>\iYEe.exe
C:\RCX15.tmp
C:\RCX14.tmp
C:\RCX13.tmp
<Current directory>\doUE.ico
<Current directory>\eMAc.exe
%TEMP%\NWsMkgQY.bat
<Current directory>\isAW.exe
C:\RCX17.tmp
<Current directory>\RYAM.ico
<Current directory>\GegU.ico
<Current directory>\vUUg.ico
<Current directory>\BccE.exe
C:\RCX16.tmp
<Current directory>\MQIg.exe
C:\RCX10.tmp
<Current directory>\XsQA.ico
<Current directory>\CIYA.ico
<Current directory>\xwEU.exe
C:\RCXF.tmp
%TEMP%\OwAQYcAk.bat
<Current directory>\PkgA.exe
C:\RCX12.tmp
<Current directory>\bMoc.ico
<Current directory>\dQcY.exe
<Current directory>\TwIG.exe
C:\RCX11.tmp
%TEMP%\LagQAQwA.bat
<Current directory>\kuAI.ico
C:\RCX1D.tmp
<Current directory>\JSkA.ico
<Current directory>\lAYS.exe
<Current directory>\DwsC.exe
C:\RCX1C.tmp
%TEMP%\UaEwkEwY.bat
<Current directory>\EaIc.ico
C:\RCX1E.tmp
%TEMP%\PScgwckQ.bat
<Current directory>\Yacs.ico
<Current directory>\vUYm.exe
%TEMP%\WggIQMwc.bat
<Current directory>\waEY.ico
<Current directory>\MMwg.exe
C:\RCX1F.tmp
<Current directory>\vQIs.exe
C:\RCX19.tmp
<Current directory>\igcw.ico
<Current directory>\VQgY.ico
%TEMP%\DEEkcMok.bat
<Current directory>\rsQu.exe
C:\RCX18.tmp
<Current directory>\jEkQ.exe
C:\RCX1B.tmp
<Current directory>\DCYw.ico
<Current directory>\FQkk.exe
%TEMP%\xoQIEwcM.bat
C:\RCX1A.tmp
<Current directory>\zYMY.ico
<Current directory>\ysoU.exe
<Current directory>\PUwc.ico
<Current directory>\uQUO.exe
C:\RCX4.tmp
C:\RCX3.tmp
C:\RCX2.tmp
<Current directory>\EusQ.ico
<Current directory>\kQou.exe
%TEMP%\CwsMcUAw.bat
<Current directory>\rQEC.exe
%TEMP%\nMgMQsgY.bat
C:\RCX6.tmp
<Current directory>\sMAY.ico
<Current directory>\Nmck.ico
<Current directory>\gEYM.exe
C:\RCX5.tmp
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\MIUIsgsY.bat
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
<Current directory>\Xsoo.ico
<Current directory>\OkAo.ico
<Current directory>\FYou.exe
%TEMP%\pcQcUMQg.bat
%TEMP%\file.vbs
<Current directory>\jUAU.exe
C:\RCX1.tmp
%TEMP%\wMYcIsIM.bat
<Current directory>\HoAo.ico
<Current directory>\EEcA.exe
C:\RCXC.tmp
C:\RCXB.tmp
%TEMP%\cucsgEME.bat
<Current directory>\ZeYA.ico
<Current directory>\FkQk.exe
%TEMP%\PCoEcwwM.bat
<Current directory>\HIoW.exe
C:\RCXE.tmp
<Current directory>\KWss.ico
<Current directory>\jeEc.ico
<Current directory>\rWoY.ico
<Current directory>\TsEE.exe
C:\RCXD.tmp
%TEMP%\CSAoIUUc.bat
<Current directory>\YCMM.ico
<Current directory>\eEQo.exe
C:\RCX7.tmp
%TEMP%\EysEgUQE.bat
<Current directory>\KkIc.ico
<Current directory>\RgUu.exe
C:\RCX8.tmp
<Current directory>\YMcI.ico
<Current directory>\aYkE.exe
C:\RCXA.tmp
C:\RCX9.tmp
%TEMP%\lQIYYMUY.bat
<Current directory>\QAoA.ico
<Current directory>\kwsq.exe

Deletes the following files:

<Current directory>\RsAc.ico
%TEMP%\NWsMkgQY.bat
<Current directory>\doUE.ico
<Current directory>\iYEe.exe
<Current directory>\isAW.exe
<Current directory>\GegU.ico
<Current directory>\BccE.exe
<Current directory>\vUUg.ico
<Current directory>\eMAc.exe
<Current directory>\PkgA.exe
<Current directory>\XsQA.ico
<Current directory>\MQIg.exe
<Current directory>\CIYA.ico
<Current directory>\dQcY.exe
<Current directory>\bMoc.ico
<Current directory>\TwIG.exe
<Current directory>\kuAI.ico
<Current directory>\rsQu.exe
<Current directory>\EaIc.ico
<Current directory>\lAYS.exe
<Current directory>\DCYw.ico
<Current directory>\DwsC.exe
<Current directory>\waEY.ico
%TEMP%\WggIQMwc.bat
<Current directory>\JSkA.ico
<Current directory>\MMwg.exe
<Current directory>\FQkk.exe
<Current directory>\VQgY.ico
<Current directory>\jEkQ.exe
<Current directory>\RYAM.ico
<Current directory>\vQIs.exe
<Current directory>\ysoU.exe
<Current directory>\zYMY.ico
<Current directory>\igcw.ico
%TEMP%\xoQIEwcM.bat
%TEMP%\OwAQYcAk.bat
<Current directory>\Nmck.ico
%TEMP%\nMgMQsgY.bat
<Current directory>\PUwc.ico
<Current directory>\gEYM.exe
<Current directory>\RgUu.exe
<Current directory>\KkIc.ico
<Current directory>\rQEC.exe
<Current directory>\sMAY.ico
<Current directory>\uQUO.exe
<Current directory>\Xsoo.ico
<Current directory>\FYou.exe
%TEMP%\MIUIsgsY.bat
<Current directory>\jUAU.exe
<Current directory>\kQou.exe
<Current directory>\EusQ.ico
<Current directory>\OkAo.ico
%TEMP%\pcQcUMQg.bat
%TEMP%\CSAoIUUc.bat
<Current directory>\TsEE.exe
<Current directory>\rWoY.ico
<Current directory>\EEcA.exe
<Current directory>\HoAo.ico
<Current directory>\xwEU.exe
<Current directory>\KWss.ico
<Current directory>\HIoW.exe
<Current directory>\jeEc.ico
<Current directory>\ZeYA.ico
<Current directory>\kwsq.exe
<Current directory>\QAoA.ico
<Current directory>\eEQo.exe
<Current directory>\YCMM.ico
%TEMP%\cucsgEME.bat
<Current directory>\FkQk.exe
<Current directory>\aYkE.exe
<Current directory>\YMcI.ico

Moves the following files:

from C:\RCX15.tmp to <Current directory>\iYEe.exe
from C:\RCX16.tmp to <Current directory>\BccE.exe
from C:\RCX17.tmp to <Current directory>\isAW.exe
from C:\RCX14.tmp to <Current directory>\eMAc.exe
from C:\RCX11.tmp to <Current directory>\PkgA.exe
from C:\RCX12.tmp to <Current directory>\TwIG.exe
from C:\RCX13.tmp to <Current directory>\dQcY.exe
from C:\RCX18.tmp to <Current directory>\rsQu.exe
from C:\RCX1D.tmp to <Current directory>\DwsC.exe
from C:\RCX1E.tmp to <Current directory>\lAYS.exe
from C:\RCX1F.tmp to <Current directory>\MMwg.exe
from C:\RCX1C.tmp to <Current directory>\FQkk.exe
from C:\RCX19.tmp to <Current directory>\vQIs.exe
from C:\RCX1A.tmp to <Current directory>\jEkQ.exe
from C:\RCX1B.tmp to <Current directory>\ysoU.exe
from C:\RCX10.tmp to <Current directory>\MQIg.exe
from C:\RCX5.tmp to <Current directory>\gEYM.exe
from C:\RCX6.tmp to <Current directory>\rQEC.exe
from C:\RCX7.tmp to <Current directory>\RgUu.exe
from C:\RCX4.tmp to <Current directory>\uQUO.exe
from C:\RCX1.tmp to <Current directory>\jUAU.exe
from C:\RCX2.tmp to <Current directory>\FYou.exe
from C:\RCX3.tmp to <Current directory>\kQou.exe
from C:\RCX8.tmp to <Current directory>\eEQo.exe
from C:\RCXD.tmp to <Current directory>\TsEE.exe
from C:\RCXE.tmp to <Current directory>\HIoW.exe
from C:\RCXF.tmp to <Current directory>\xwEU.exe
from C:\RCXC.tmp to <Current directory>\EEcA.exe
from C:\RCX9.tmp to <Current directory>\kwsq.exe
from C:\RCXA.tmp to <Current directory>\aYkE.exe
from C:\RCXB.tmp to <Current directory>\FkQk.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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