Trojan.DownLoader12.16454

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%\jGIUEwkc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DYIgAwkc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\aWQgoAwg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\hoskocwE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\MkUwIQUw.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\zwkYEcEA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\AssAUIcA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\eCAUksYw.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>\cmd.exe' /c ""%TEMP%\uOcUIsoY.bat" "<Full path to virus>""
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\oUgoEgYY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\MyUgYgMY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\sgIMcAQM.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\RKYkMkEQ.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\qUQU.ico
<Current directory>\PcEC.exe
C:\RCX10.tmp
C:\RCXF.tmp
C:\RCXE.tmp
<Current directory>\GCkw.ico
<Current directory>\JscS.exe
<Current directory>\occg.exe
C:\RCX12.tmp
<Current directory>\sqQw.ico
<Current directory>\uwwQ.ico
<Current directory>\kSIc.ico
<Current directory>\dYIc.exe
C:\RCX11.tmp
<Current directory>\hYoa.exe
C:\RCXB.tmp
<Current directory>\xIkE.ico
<Current directory>\RWos.ico
<Current directory>\hUQQ.ico
<Current directory>\WsIg.exe
C:\RCXA.tmp
C:\RCXD.tmp
<Current directory>\Zegg.ico
<Current directory>\ycwI.exe
<Current directory>\bwwY.exe
<Current directory>\XMwG.exe
C:\RCXC.tmp
<Current directory>\eKgk.ico
<Current directory>\ZswC.exe
C:\RCX19.tmp
<Current directory>\qOwk.ico
<Current directory>\Dcck.ico
<Current directory>\bQAs.ico
<Current directory>\ZIAI.exe
C:\RCX18.tmp
<Current directory>\HUkE.exe
<Current directory>\oucI.ico
<Current directory>\wMEu.exe
<Current directory>\MUQg.ico
<Current directory>\roEM.exe
C:\RCX1A.tmp
%TEMP%\zwkYEcEA.bat
C:\RCX14.tmp
<Current directory>\hYsk.ico
<Current directory>\tQEK.exe
<Current directory>\hcMu.exe
<Current directory>\NMoS.exe
C:\RCX13.tmp
<Current directory>\SKos.ico
<Current directory>\xYAw.ico
<Current directory>\YYEy.exe
C:\RCX17.tmp
C:\RCX16.tmp
C:\RCX15.tmp
<Current directory>\NIsE.ico
<Current directory>\okAc.exe
%TEMP%\eCAUksYw.bat
%TEMP%\XYQgsUAY.bat
%TEMP%\MyUgYgMY.bat
%TEMP%\ucQwokcc.bat
%TEMP%\oUgoEgYY.bat
%TEMP%\RKYkMkEQ.bat
<Current directory>\iWwk.ico
%TEMP%\FeQMskow.bat
<Current directory>\fwQs.ico
<Current directory>\CwAm.exe
C:\RCX3.tmp
%TEMP%\WuwYkgQo.bat
<Current directory>\fIEG.exe
C:\RCX2.tmp
%TEMP%\aWQgoAwg.bat
%TEMP%\wGkIUcoY.bat
%ALLUSERSPROFILE%\casg.txt
%TEMP%\uOcUIsoY.bat
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\QCYEIcgA.bat
%TEMP%\file.vbs
%TEMP%\sgIMcAQM.bat
%TEMP%\beYssAcI.bat
C:\RCX1.tmp
%TEMP%\HqccoMgU.bat
<Current directory>\AUQE.ico
<Current directory>\jYAC.exe
C:\RCX7.tmp
%TEMP%\oWgIEUUo.bat
<Current directory>\FWkA.ico
<Current directory>\PgUA.exe
%TEMP%\pikUYwcA.bat
<Current directory>\HIwk.ico
%TEMP%\MkUwIQUw.bat
<Current directory>\sckk.ico
<Current directory>\CUMW.exe
C:\RCX9.tmp
%TEMP%\TQIswcEo.bat
%TEMP%\AssAUIcA.bat
<Current directory>\MwAU.exe
C:\RCX8.tmp
C:\RCX4.tmp
%TEMP%\jGIUEwkc.bat
<Current directory>\ZCwo.ico
<Current directory>\RAAE.exe
%TEMP%\hoskocwE.bat
<Current directory>\jmok.ico
%TEMP%\NCswEQMc.bat
<Current directory>\MIso.ico
<Current directory>\XsIe.exe
C:\RCX6.tmp
%TEMP%\DYIgAwkc.bat
<Current directory>\UcwU.exe
%TEMP%\cWIQoYgI.bat
C:\RCX5.tmp

Deletes the following files:

<Current directory>\dYIc.exe
<Current directory>\kSIc.ico
<Current directory>\PcEC.exe
<Current directory>\qUQU.ico
<Current directory>\NMoS.exe
<Current directory>\sqQw.ico
<Current directory>\occg.exe
<Current directory>\uwwQ.ico
<Current directory>\GCkw.ico
<Current directory>\xIkE.ico
<Current directory>\bwwY.exe
<Current directory>\RWos.ico
<Current directory>\XMwG.exe
<Current directory>\Zegg.ico
<Current directory>\JscS.exe
<Current directory>\eKgk.ico
<Current directory>\ycwI.exe
<Current directory>\Dcck.ico
<Current directory>\roEM.exe
<Current directory>\bQAs.ico
<Current directory>\ZswC.exe
<SYSTEM32>\wbem\Performance\WmiApRpl.ini
<SYSTEM32>\PerfStringBackup.TMP
<Current directory>\qOwk.ico
<Current directory>\MUQg.ico
<Current directory>\ZIAI.exe
<Current directory>\tQEK.exe
<Current directory>\hYsk.ico
<Current directory>\hcMu.exe
<Current directory>\SKos.ico
<Current directory>\YYEy.exe
<Current directory>\xYAw.ico
<Current directory>\okAc.exe
<Current directory>\NIsE.ico
%TEMP%\WuwYkgQo.bat
<Current directory>\CwAm.exe
<Current directory>\fIEG.exe
<Current directory>\iWwk.ico
<Current directory>\RAAE.exe
<Current directory>\jmok.ico
<Current directory>\fwQs.ico
%TEMP%\NCswEQMc.bat
%TEMP%\ucQwokcc.bat
%TEMP%\HqccoMgU.bat
%TEMP%\beYssAcI.bat
%TEMP%\QCYEIcgA.bat
%TEMP%\wGkIUcoY.bat
%TEMP%\FeQMskow.bat
%TEMP%\XYQgsUAY.bat
<Current directory>\jYAC.exe
<Current directory>\AUQE.ico
<Current directory>\FWkA.ico
<Current directory>\CUMW.exe
<Current directory>\MwAU.exe
%TEMP%\TQIswcEo.bat
<Current directory>\hUQQ.ico
<Current directory>\hYoa.exe
<Current directory>\sckk.ico
<Current directory>\WsIg.exe
%TEMP%\oWgIEUUo.bat
<Current directory>\ZCwo.ico
%TEMP%\pikUYwcA.bat
%TEMP%\cWIQoYgI.bat
<Current directory>\UcwU.exe
<Current directory>\PgUA.exe
<Current directory>\HIwk.ico
<Current directory>\XsIe.exe
<Current directory>\MIso.ico

Moves the following files:

from C:\RCX11.tmp to <Current directory>\dYIc.exe
from C:\RCX12.tmp to <Current directory>\occg.exe
from C:\RCX13.tmp to <Current directory>\NMoS.exe
from C:\RCXE.tmp to <Current directory>\ycwI.exe
from C:\RCXF.tmp to <Current directory>\JscS.exe
from C:\RCX10.tmp to <Current directory>\PcEC.exe
from C:\RCX14.tmp to <Current directory>\hcMu.exe
from C:\RCX18.tmp to <Current directory>\ZIAI.exe
from C:\RCX19.tmp to <Current directory>\ZswC.exe
from C:\RCX1A.tmp to <Current directory>\roEM.exe
from C:\RCX15.tmp to <Current directory>\tQEK.exe
from C:\RCX16.tmp to <Current directory>\okAc.exe
from C:\RCX17.tmp to <Current directory>\YYEy.exe
from C:\RCX4.tmp to <Current directory>\RAAE.exe
from C:\RCX5.tmp to <Current directory>\UcwU.exe
from C:\RCX6.tmp to <Current directory>\XsIe.exe
from C:\RCX1.tmp to <Current directory>\jYAC.exe
from C:\RCX2.tmp to <Current directory>\fIEG.exe
from C:\RCX3.tmp to <Current directory>\CwAm.exe
from C:\RCX7.tmp to <Current directory>\PgUA.exe
from C:\RCXB.tmp to <Current directory>\hYoa.exe
from C:\RCXC.tmp to <Current directory>\XMwG.exe
from C:\RCXD.tmp to <Current directory>\bwwY.exe
from C:\RCX8.tmp to <Current directory>\MwAU.exe
from C:\RCX9.tmp to <Current directory>\CUMW.exe
from C:\RCXA.tmp to <Current directory>\WsIg.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: 'jaQEcQMQ.exe'
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: 'Microsoft Windows'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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