Trojan.DownLoader12.5946

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<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%\esEQAgYY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UWYYUccg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\nsMoIIIE.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\KUokAwAg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\MgcAAwgc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\TQcgwYwk.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%\pQYYUoUg.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\pusUwwko.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\oQwI.exe
%TEMP%\cQsMYocs.bat
C:\RCX10.tmp
C:\RCXF.tmp
%TEMP%\KUokAwAg.bat
<Current directory>\FaAc.ico
<Current directory>\CgAA.ico
<Current directory>\PIwM.ico
<Current directory>\QAsM.exe
C:\RCX12.tmp
<Current directory>\Mckg.exe
C:\RCX11.tmp
%TEMP%\sUQgkoAY.bat
%TEMP%\kacAwckw.bat
<Current directory>\OAYo.exe
C:\RCXD.tmp
<Current directory>\DUEK.exe
C:\RCXC.tmp
<Current directory>\ZYsI.ico
<Current directory>\WaAw.ico
%TEMP%\ewAMUoQQ.bat
<Current directory>\tacI.ico
<Current directory>\UAYM.exe
%TEMP%\MgcAAwgc.bat
<Current directory>\XkIG.exe
C:\RCXE.tmp
<Current directory>\nUYA.exe
C:\RCX17.tmp
<Current directory>\kmgc.ico
<Current directory>\qgQm.exe
C:\RCX16.tmp
<Current directory>\uuEU.ico
<Current directory>\NIoI.exe
C:\RCX19.tmp
<Current directory>\jSYY.ico
<Current directory>\uooY.exe
C:\RCX18.tmp
<Current directory>\tuIA.ico
<Current directory>\Csgu.exe
C:\RCX13.tmp
%TEMP%\MCUEQssI.bat
<Current directory>\eowI.ico
%TEMP%\rmgAYEcs.bat
<Current directory>\DWko.ico
<Current directory>\AgMW.exe
<Current directory>\eIkU.exe
<Current directory>\FMsO.exe
C:\RCX15.tmp
<Current directory>\qwgY.ico
C:\RCX14.tmp
%TEMP%\SgMIEcgg.bat
<Current directory>\HQcs.ico
C:\RCX2.tmp
<Current directory>\wUAg.ico
<Current directory>\PoQc.exe
%TEMP%\zAsUwcUE.bat
<Current directory>\nWUg.ico
<Current directory>\ucUo.exe
C:\RCX3.tmp
C:\RCX4.tmp
<Current directory>\SwAI.ico
<Current directory>\eMIW.exe
%TEMP%\TQcgwYwk.bat
<Current directory>\ckUc.ico
<Current directory>\AEIO.exe
<Current directory>\<Virus name>
%TEMP%\bCIoIIcA.bat
%TEMP%\pusUwwko.bat
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\asEEYQIg.bat
%ALLUSERSPROFILE%\casg.txt
<Current directory>\WoMU.exe
C:\RCX1.tmp
%TEMP%\pQYYUoUg.bat
%TEMP%\file.vbs
%TEMP%\vIMYcQwI.bat
<Current directory>\TOQM.ico
%TEMP%\UWYYUccg.bat
<Current directory>\baco.ico
<Current directory>\mgow.exe
<Current directory>\IqEw.ico
<Current directory>\Ycga.exe
C:\RCX9.tmp
C:\RCXA.tmp
C:\RCXB.tmp
%TEMP%\esEQAgYY.bat
<Current directory>\KykM.ico
%TEMP%\FYYgQAYk.bat
<Current directory>\umwE.ico
<Current directory>\oMoC.exe
C:\RCX6.tmp
<Current directory>\kycg.ico
<Current directory>\nwIq.exe
C:\RCX5.tmp
<Current directory>\Iasw.ico
<Current directory>\vYMe.exe
%TEMP%\pSkocQAU.bat
C:\RCX8.tmp
%TEMP%\nsMoIIIE.bat
%TEMP%\SGYswMYY.bat
C:\RCX7.tmp
<Current directory>\HEEs.ico
<Current directory>\BEUm.exe

Sets the 'hidden' attribute to the following files:

%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe
%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe

Deletes the following files:

<Current directory>\FaAc.ico
<Current directory>\oQwI.exe
%TEMP%\cQsMYocs.bat
<Current directory>\Mckg.exe
<Current directory>\PIwM.ico
<Current directory>\QAsM.exe
<Current directory>\CgAA.ico
<Current directory>\tacI.ico
<Current directory>\ZYsI.ico
<Current directory>\OAYo.exe
%TEMP%\kacAwckw.bat
<Current directory>\XkIG.exe
<Current directory>\UAYM.exe
<Current directory>\WaAw.ico
%TEMP%\ewAMUoQQ.bat
%TEMP%\rmgAYEcs.bat
<Current directory>\NIoI.exe
<Current directory>\uuEU.ico
<Current directory>\nUYA.exe
<Current directory>\kmgc.ico
<Current directory>\jSYY.ico
<Current directory>\tuIA.ico
<Current directory>\Csgu.exe
<Current directory>\qwgY.ico
<Current directory>\eIkU.exe
<Current directory>\DWko.ico
<Current directory>\AgMW.exe
<Current directory>\eowI.ico
<Current directory>\qgQm.exe
<Current directory>\HQcs.ico
<Current directory>\FMsO.exe
<Current directory>\AEIO.exe
<Current directory>\wUAg.ico
<Current directory>\PoQc.exe
<Current directory>\ckUc.ico
<Current directory>\vYMe.exe
<Current directory>\SwAI.ico
<Current directory>\eMIW.exe
<Current directory>\nWUg.ico
%TEMP%\vIMYcQwI.bat
%TEMP%\bCIoIIcA.bat
%TEMP%\asEEYQIg.bat
<Current directory>\WoMU.exe
<Current directory>\ucUo.exe
%TEMP%\zAsUwcUE.bat
<Current directory>\TOQM.ico
<Current directory>\Iasw.ico
%TEMP%\FYYgQAYk.bat
<Current directory>\baco.ico
<Current directory>\mgow.exe
<Current directory>\oMoC.exe
<Current directory>\KykM.ico
<Current directory>\DUEK.exe
<Current directory>\umwE.ico
<Current directory>\IqEw.ico
%TEMP%\pSkocQAU.bat
<Current directory>\kycg.ico
<Current directory>\nwIq.exe
<Current directory>\BEUm.exe
<Current directory>\Ycga.exe
%TEMP%\SGYswMYY.bat
<Current directory>\HEEs.ico

Moves the following files:

from C:\RCX11.tmp to <Current directory>\Mckg.exe
from C:\RCX12.tmp to <Current directory>\QAsM.exe
from C:\RCX13.tmp to <Current directory>\AgMW.exe
from C:\RCXE.tmp to <Current directory>\XkIG.exe
from C:\RCXF.tmp to <Current directory>\UAYM.exe
from C:\RCX10.tmp to <Current directory>\oQwI.exe
from C:\RCX17.tmp to <Current directory>\nUYA.exe
from C:\RCX18.tmp to <Current directory>\NIoI.exe
from C:\RCX19.tmp to <Current directory>\Csgu.exe
from C:\RCX14.tmp to <Current directory>\eIkU.exe
from C:\RCX15.tmp to <Current directory>\FMsO.exe
from C:\RCX16.tmp to <Current directory>\qgQm.exe
from C:\RCXD.tmp to <Current directory>\OAYo.exe
from C:\RCX4.tmp to <Current directory>\AEIO.exe
from C:\RCX5.tmp to <Current directory>\eMIW.exe
from C:\RCX6.tmp to <Current directory>\vYMe.exe
from C:\RCX1.tmp to <Current directory>\WoMU.exe
from C:\RCX2.tmp to <Current directory>\ucUo.exe
from C:\RCX3.tmp to <Current directory>\PoQc.exe
from C:\RCXA.tmp to <Current directory>\mgow.exe
from C:\RCXB.tmp to <Current directory>\oMoC.exe
from C:\RCXC.tmp to <Current directory>\DUEK.exe
from C:\RCX7.tmp to <Current directory>\nwIq.exe
from C:\RCX8.tmp to <Current directory>\BEUm.exe
from C:\RCX9.tmp to <Current directory>\Ycga.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: 'jaQEcQMQ.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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