Trojan.DownLoader12.26695

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%\RCAgkcYQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\YCIoMcYw.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fYEsAoog.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\RyUgogMI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\EQcsQsMs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\fOskMUMc.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%\OycsYoAE.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\OgIUgoog.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

%TEMP%\TeoUQYYw.bat
%TEMP%\fYEsAoog.bat
<Current directory>\EQAY.ico
<Current directory>\WOQY.ico
<Current directory>\GQQW.exe
C:\RCX14.tmp
<Current directory>\aEEM.exe
C:\RCX16.tmp
%TEMP%\AisEMkUY.bat
%TEMP%\YCIoMcYw.bat
C:\RCX15.tmp
<Current directory>\ikEw.ico
<Current directory>\RMUG.exe
C:\RCX13.tmp
<Current directory>\tAMc.ico
<Current directory>\uIoG.exe
C:\RCX11.tmp
<Current directory>\NswM.ico
<Current directory>\XAYq.exe
C:\RCX10.tmp
%TEMP%\uowcwwcM.bat
C:\RCX12.tmp
<Current directory>\YGkA.ico
<Current directory>\zUEs.exe
%TEMP%\OycsYoAE.bat
<Current directory>\hIAk.ico
<Current directory>\sUQa.exe
<Current directory>\mOEY.ico
<Current directory>\yAgs.exe
C:\RCX1B.tmp
<Current directory>\GCEE.ico
C:\RCX1A.tmp
%TEMP%\EQcsQsMs.bat
<Current directory>\MQEU.ico
<Current directory>\GEsQ.exe
%TEMP%\RyUgogMI.bat
<Current directory>\iUYa.exe
C:\RCX1D.tmp
C:\RCX1C.tmp
%TEMP%\IQMgUoAc.bat
<Current directory>\EYUY.ico
%TEMP%\fOskMUMc.bat
<Current directory>\BgYk.exe
%TEMP%\KqwEkUYo.bat
C:\RCX18.tmp
<Current directory>\XIEE.exe
C:\RCX17.tmp
<Current directory>\NqMw.ico
%TEMP%\RCAgkcYQ.bat
<Current directory>\YKYA.ico
<Current directory>\HwsE.exe
%TEMP%\sKsgEAIs.bat
<Current directory>\dMkQ.ico
<Current directory>\RkQI.exe
C:\RCX19.tmp
<Current directory>\REIg.exe
%TEMP%\dokwggME.bat
C:\RCX4.tmp
<Current directory>\xYME.exe
C:\RCX3.tmp
<Current directory>\Sygk.ico
%TEMP%\OgIUgoog.bat
<Current directory>\wQUo.ico
<Current directory>\EoIk.exe
C:\RCX6.tmp
<Current directory>\ZkoU.ico
<Current directory>\RQQa.exe
C:\RCX5.tmp
<Current directory>\oCoQ.ico
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\kQwcYgok.bat
<Current directory>\<Virus name>
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\casg.txt
<Current directory>\oaMw.ico
<Current directory>\cIgK.exe
C:\RCX2.tmp
<Current directory>\Owgw.ico
<Current directory>\PMEQ.exe
C:\RCX1.tmp
%TEMP%\file.vbs
C:\RCXC.tmp
<Current directory>\jysE.ico
<Current directory>\NAIU.exe
C:\RCXB.tmp
<Current directory>\vCMY.ico
<Current directory>\XAsc.exe
C:\RCXD.tmp
<Current directory>\UkoA.ico
<Current directory>\hIoY.exe
C:\RCXF.tmp
<Current directory>\jigw.ico
<Current directory>\Awge.exe
C:\RCXE.tmp
<Current directory>\toEY.exe
<Current directory>\UgEw.ico
<Current directory>\KgAS.exe
C:\RCX8.tmp
<Current directory>\AEMM.ico
<Current directory>\rUMw.exe
C:\RCX7.tmp
<Current directory>\qsUA.ico
<Current directory>\Sgoe.exe
C:\RCXA.tmp
<Current directory>\vCMI.ico
<Current directory>\NcIm.exe
C:\RCX9.tmp
<Current directory>\xick.ico

Deletes the following files:

<Current directory>\GQQW.exe
<Current directory>\WOQY.ico
<Current directory>\YGkA.ico
%TEMP%\TeoUQYYw.bat
%TEMP%\AisEMkUY.bat
<Current directory>\RMUG.exe
<Current directory>\aEEM.exe
<Current directory>\EQAY.ico
%TEMP%\uowcwwcM.bat
<Current directory>\uIoG.exe
<Current directory>\XAYq.exe
<Current directory>\NswM.ico
<Current directory>\hIAk.ico
<Current directory>\zUEs.exe
<Current directory>\tAMc.ico
<Current directory>\sUQa.exe
<Current directory>\YKYA.ico
<Current directory>\yAgs.exe
%TEMP%\sKsgEAIs.bat
<Current directory>\HwsE.exe
%TEMP%\IQMgUoAc.bat
<Current directory>\GCEE.ico
<Current directory>\MQEU.ico
<Current directory>\GEsQ.exe
<Current directory>\mOEY.ico
%TEMP%\KqwEkUYo.bat
<Current directory>\ikEw.ico
<Current directory>\XIEE.exe
<Current directory>\RkQI.exe
<Current directory>\dMkQ.ico
<Current directory>\BgYk.exe
<Current directory>\NqMw.ico
<Current directory>\RQQa.exe
<Current directory>\ZkoU.ico
<Current directory>\REIg.exe
<Current directory>\Sygk.ico
<Current directory>\rUMw.exe
<Current directory>\AEMM.ico
<Current directory>\EoIk.exe
<Current directory>\wQUo.ico
<Current directory>\Owgw.ico
<Current directory>\cIgK.exe
%TEMP%\kQwcYgok.bat
<Current directory>\PMEQ.exe
<Current directory>\oCoQ.ico
%TEMP%\dokwggME.bat
<Current directory>\oaMw.ico
<Current directory>\xYME.exe
<Current directory>\NAIU.exe
<Current directory>\jysE.ico
<Current directory>\XAsc.exe
<Current directory>\vCMY.ico
<Current directory>\hIoY.exe
<Current directory>\UkoA.ico
<Current directory>\Awge.exe
<Current directory>\jigw.ico
<Current directory>\NcIm.exe
<Current directory>\qsUA.ico
<Current directory>\KgAS.exe
<Current directory>\UgEw.ico
<Current directory>\toEY.exe
<Current directory>\vCMI.ico
<Current directory>\Sgoe.exe
<Current directory>\xick.ico

Moves the following files:

from C:\RCX13.tmp to <Current directory>\zUEs.exe
from C:\RCX14.tmp to <Current directory>\GQQW.exe
from C:\RCX15.tmp to <Current directory>\aEEM.exe
from C:\RCX12.tmp to <Current directory>\sUQa.exe
from C:\RCXF.tmp to <Current directory>\hIoY.exe
from C:\RCX10.tmp to <Current directory>\XAYq.exe
from C:\RCX11.tmp to <Current directory>\uIoG.exe
from C:\RCX1A.tmp to <Current directory>\HwsE.exe
from C:\RCX1B.tmp to <Current directory>\yAgs.exe
from C:\RCX1C.tmp to <Current directory>\GEsQ.exe
from C:\RCX19.tmp to <Current directory>\RkQI.exe
from C:\RCX16.tmp to <Current directory>\RMUG.exe
from C:\RCX17.tmp to <Current directory>\XIEE.exe
from C:\RCX18.tmp to <Current directory>\BgYk.exe
from C:\RCX5.tmp to <Current directory>\RQQa.exe
from C:\RCX6.tmp to <Current directory>\EoIk.exe
from C:\RCX7.tmp to <Current directory>\rUMw.exe
from C:\RCX4.tmp to <Current directory>\REIg.exe
from C:\RCX1.tmp to <Current directory>\PMEQ.exe
from C:\RCX2.tmp to <Current directory>\cIgK.exe
from C:\RCX3.tmp to <Current directory>\xYME.exe
from C:\RCXC.tmp to <Current directory>\XAsc.exe
from C:\RCXD.tmp to <Current directory>\NAIU.exe
from C:\RCXE.tmp to <Current directory>\Awge.exe
from C:\RCXB.tmp to <Current directory>\toEY.exe
from C:\RCX8.tmp to <Current directory>\KgAS.exe
from C:\RCX9.tmp to <Current directory>\NcIm.exe
from C:\RCXA.tmp to <Current directory>\Sgoe.exe

Network activity:

Connects to:

'74.##5.232.51':80
'bl##k.io':443

TCP:

HTTP GET requests:

74.##5.232.51/

UDP:

DNS ASK google.com
DNS ASK bl##k.io

Miscellaneous:

Searches for the following windows:

ClassName: '' WindowName: 'Microsoft Windows'
ClassName: '' WindowName: 'jaQEcQMQ.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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