Trojan.DownLoader12.31810

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%\GqQAgIAg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\TgUsQYwU.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DOckcwIo.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\cCQMIIsA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\piYYMUAs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\wQoAwIQg.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%\KcAkEcIY.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ZoYAcgIk.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\OMMw.ico
<Current directory>\rwMM.exe
C:\RCX14.tmp
C:\RCX13.tmp
%TEMP%\piYYMUAs.bat
<Current directory>\KQwo.ico
<Current directory>\jowy.exe
<Current directory>\Zcck.exe
C:\RCX16.tmp
<Current directory>\xIUU.ico
<Current directory>\IiUQ.ico
<Current directory>\QSYY.ico
<Current directory>\FkgM.exe
C:\RCX15.tmp
C:\RCX12.tmp
C:\RCXF.tmp
<Current directory>\YEkc.ico
<Current directory>\KYQI.exe
<Current directory>\vIgw.exe
<Current directory>\vosW.exe
C:\RCXE.tmp
<Current directory>\secc.ico
C:\RCX11.tmp
<Current directory>\IAMw.ico
<Current directory>\VIwc.exe
<Current directory>\EgkS.exe
C:\RCX10.tmp
<Current directory>\eEIk.ico
%TEMP%\DasMYcYw.bat
<Current directory>\vkQc.exe
C:\RCX1C.tmp
<Current directory>\ESIA.ico
<Current directory>\cwAa.exe
<Current directory>\JsAi.exe
C:\RCX1B.tmp
%TEMP%\uWUgosgs.bat
<Current directory>\xawo.ico
<Current directory>\lOkk.ico
<Current directory>\JgIG.exe
C:\RCX1F.tmp
C:\RCX1E.tmp
C:\RCX1D.tmp
<Current directory>\tGYI.ico
<Current directory>\fMII.exe
%TEMP%\SIwcIIAs.bat
C:\RCX18.tmp
<Current directory>\neQg.ico
<Current directory>\Gscc.exe
<Current directory>\Twka.exe
C:\RCX17.tmp
%TEMP%\rqoMQMIM.bat
<Current directory>\sccg.ico
C:\RCX1A.tmp
<Current directory>\SSoE.ico
<Current directory>\Fwgo.exe
<Current directory>\psso.exe
C:\RCX19.tmp
%TEMP%\cCQMIIsA.bat
<Current directory>\LYkY.ico
%TEMP%\BkMwcwQk.bat
<Current directory>\kykA.ico
<Current directory>\cUQC.exe
C:\RCX2.tmp
%TEMP%\TsYgQMYY.bat
%TEMP%\DOckcwIo.bat
<Current directory>\NAoC.exe
C:\RCX4.tmp
<Current directory>\RaQo.ico
<Current directory>\YYUO.exe
<Current directory>\xYoQ.exe
C:\RCX3.tmp
%TEMP%\TgUsQYwU.bat
<Current directory>\AOIo.ico
<Current directory>\eMEY.ico
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\dcIYYsoo.bat
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\file.vbs
%TEMP%\SaswwccU.bat
%TEMP%\KcAkEcIY.bat
C:\RCX1.tmp
<Current directory>\WkAU.ico
%TEMP%\ZoYAcgIk.bat
<Current directory>\toMi.exe
C:\RCX5.tmp
%TEMP%\rEUkQwog.bat
C:\RCXB.tmp
<Current directory>\omgk.ico
<Current directory>\oMsG.exe
<Current directory>\BYwM.exe
C:\RCXA.tmp
<Current directory>\QOcM.ico
<Current directory>\FUoa.exe
C:\RCXD.tmp
<Current directory>\qGsE.ico
<Current directory>\Jskc.ico
<Current directory>\YIEW.exe
C:\RCXC.tmp
%TEMP%\wQoAwIQg.bat
<Current directory>\SGIQ.ico
C:\RCX6.tmp
<Current directory>\QgcU.ico
<Current directory>\yQYa.exe
%TEMP%\GqQAgIAg.bat
%TEMP%\qIUsMgkg.bat
<Current directory>\hUwc.ico
<Current directory>\jYgM.exe
<Current directory>\EAEk.ico
<Current directory>\oMIA.exe
C:\RCX9.tmp
C:\RCX8.tmp
C:\RCX7.tmp
<Current directory>\BaAA.ico
<Current directory>\NYQU.exe

Deletes the following files:

<Current directory>\FkgM.exe
<Current directory>\QSYY.ico
<Current directory>\rwMM.exe
<Current directory>\OMMw.ico
<Current directory>\vkQc.exe
<Current directory>\xIUU.ico
<Current directory>\Zcck.exe
<Current directory>\IiUQ.ico
<Current directory>\KQwo.ico
%TEMP%\DasMYcYw.bat
<Current directory>\EgkS.exe
<Current directory>\KYQI.exe
<Current directory>\YEkc.ico
<Current directory>\IAMw.ico
<Current directory>\jowy.exe
<Current directory>\eEIk.ico
<Current directory>\VIwc.exe
%TEMP%\rqoMQMIM.bat
<Current directory>\cwAa.exe
<Current directory>\ESIA.ico
<Current directory>\JsAi.exe
<Current directory>\xawo.ico
<Current directory>\JgIG.exe
<Current directory>\lOkk.ico
<Current directory>\fMII.exe
<Current directory>\tGYI.ico
<Current directory>\SSoE.ico
<Current directory>\Gscc.exe
<Current directory>\neQg.ico
<Current directory>\Twka.exe
<Current directory>\sccg.ico
%TEMP%\SIwcIIAs.bat
<Current directory>\Fwgo.exe
<Current directory>\psso.exe
<Current directory>\LYkY.ico
<Current directory>\secc.ico
<Current directory>\AOIo.ico
%TEMP%\qIUsMgkg.bat
<Current directory>\kykA.ico
<Current directory>\xYoQ.exe
<Current directory>\jYgM.exe
<Current directory>\hUwc.ico
<Current directory>\YYUO.exe
<Current directory>\RaQo.ico
<Current directory>\cUQC.exe
<Current directory>\WkAU.ico
%TEMP%\SaswwccU.bat
%TEMP%\dcIYYsoo.bat
<Current directory>\toMi.exe
%TEMP%\BkMwcwQk.bat
<Current directory>\eMEY.ico
%TEMP%\TsYgQMYY.bat
<Current directory>\NAoC.exe
<Current directory>\yQYa.exe
<Current directory>\omgk.ico
<Current directory>\FUoa.exe
<Current directory>\QOcM.ico
<Current directory>\YIEW.exe
<Current directory>\qGsE.ico
<Current directory>\vIgw.exe
<Current directory>\Jskc.ico
<Current directory>\vosW.exe
<Current directory>\oMsG.exe
<Current directory>\BaAA.ico
<Current directory>\oMIA.exe
<Current directory>\QgcU.ico
<Current directory>\NYQU.exe
<Current directory>\SGIQ.ico
%TEMP%\rEUkQwog.bat
<Current directory>\EAEk.ico
<Current directory>\BYwM.exe

Moves the following files:

from C:\RCX15.tmp to <Current directory>\FkgM.exe
from C:\RCX16.tmp to <Current directory>\Zcck.exe
from C:\RCX17.tmp to <Current directory>\vkQc.exe
from C:\RCX14.tmp to <Current directory>\rwMM.exe
from C:\RCX11.tmp to <Current directory>\EgkS.exe
from C:\RCX12.tmp to <Current directory>\VIwc.exe
from C:\RCX13.tmp to <Current directory>\jowy.exe
from C:\RCX18.tmp to <Current directory>\Twka.exe
from C:\RCX1D.tmp to <Current directory>\cwAa.exe
from C:\RCX1E.tmp to <Current directory>\fMII.exe
from C:\RCX1F.tmp to <Current directory>\JgIG.exe
from C:\RCX1C.tmp to <Current directory>\JsAi.exe
from C:\RCX19.tmp to <Current directory>\Gscc.exe
from C:\RCX1A.tmp to <Current directory>\psso.exe
from C:\RCX1B.tmp to <Current directory>\Fwgo.exe
from C:\RCX10.tmp to <Current directory>\KYQI.exe
from C:\RCX5.tmp to <Current directory>\YYUO.exe
from C:\RCX6.tmp to <Current directory>\jYgM.exe
from C:\RCX7.tmp to <Current directory>\yQYa.exe
from C:\RCX4.tmp to <Current directory>\xYoQ.exe
from C:\RCX1.tmp to <Current directory>\toMi.exe
from C:\RCX2.tmp to <Current directory>\NAoC.exe
from C:\RCX3.tmp to <Current directory>\cUQC.exe
from C:\RCX8.tmp to <Current directory>\NYQU.exe
from C:\RCXD.tmp to <Current directory>\FUoa.exe
from C:\RCXE.tmp to <Current directory>\vosW.exe
from C:\RCXF.tmp to <Current directory>\vIgw.exe
from C:\RCXC.tmp to <Current directory>\YIEW.exe
from C:\RCX9.tmp to <Current directory>\oMIA.exe
from C:\RCXA.tmp to <Current directory>\BYwM.exe
from C:\RCXB.tmp to <Current directory>\oMsG.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'

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