Trojan.DownLoader12.6120

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%\EGwsYEAs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\CmQAwcAQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\TOEIAAMg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\kYQMcowo.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\XsAokIQA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\uAsYoIAk.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\biYsokwc.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%\mGwwQYQg.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\IAsAwwEY.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

C:\RCXF.tmp
<Current directory>\Pikk.ico
<Current directory>\hkka.exe
C:\RCXE.tmp
<Current directory>\BkEY.ico
<Current directory>\MMwC.exe
C:\RCX10.tmp
<Current directory>\doUo.ico
<Current directory>\tEQK.exe
C:\RCX12.tmp
<Current directory>\SYcQ.ico
<Current directory>\rUsI.exe
C:\RCX11.tmp
<Current directory>\TYQc.exe
C:\RCXB.tmp
<Current directory>\ceUk.ico
<Current directory>\PAQA.exe
C:\RCXA.tmp
<Current directory>\Oqso.ico
<Current directory>\YAwq.exe
C:\RCXD.tmp
<Current directory>\vEkM.ico
<Current directory>\QEIc.exe
C:\RCXC.tmp
<Current directory>\EmQk.ico
<Current directory>\gUkk.exe
<Current directory>\TcUy.exe
C:\RCX18.tmp
<Current directory>\iygw.ico
<Current directory>\WgII.exe
C:\RCX17.tmp
<Current directory>\amEw.ico
<Current directory>\oMsU.exe
<Current directory>\AGAE.ico
<Current directory>\gkcQ.exe
%TEMP%\kYQMcowo.bat
C:\RCX19.tmp
<Current directory>\RwQQ.ico
<Current directory>\IIEq.exe
<Current directory>\WUoc.ico
<Current directory>\boEE.exe
C:\RCX14.tmp
<Current directory>\zKgM.ico
<Current directory>\loEc.exe
C:\RCX13.tmp
<Current directory>\zKQM.ico
<Current directory>\xYgW.exe
C:\RCX16.tmp
<Current directory>\DIAw.ico
<Current directory>\uIIg.exe
C:\RCX15.tmp
<Current directory>\peAg.ico
<Current directory>\TKEE.ico
%TEMP%\kCkQoIUs.bat
<Current directory>\tIAq.exe
<Current directory>\EEYm.exe
C:\RCX2.tmp
%TEMP%\mGwwQYQg.bat
C:\RCX3.tmp
%TEMP%\biYsokwc.bat
C:\RCX4.tmp
%TEMP%\TOEIAAMg.bat
<Current directory>\hkQs.ico
%TEMP%\sIwcoQkM.bat
<Current directory>\GYYq.exe
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
%TEMP%\LuMAMMcc.bat
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\KMcIsUsQ.bat
<Current directory>\kQsM.ico
%TEMP%\JMUYIsUw.bat
<Current directory>\IwIY.ico
%TEMP%\file.vbs
%TEMP%\IAsAwwEY.bat
<Current directory>\SIwE.exe
C:\RCX1.tmp
<Current directory>\MUUM.ico
<Current directory>\eAAy.exe
C:\RCX8.tmp
C:\RCX7.tmp
%TEMP%\uAsYoIAk.bat
%TEMP%\saMUMooo.bat
%TEMP%\EGMUUEQU.bat
C:\RCX9.tmp
%TEMP%\nckQkQso.bat
<Current directory>\XSIQ.ico
%TEMP%\XsAokIQA.bat
<Current directory>\mWQw.ico
<Current directory>\hkIS.exe
%TEMP%\EUkYMwMg.bat
<Current directory>\sawc.ico
%TEMP%\DEMQkUoQ.bat
<Current directory>\xcgU.ico
<Current directory>\IkMY.exe
C:\RCX5.tmp
<Current directory>\eosS.exe
<Current directory>\VgAo.ico
%TEMP%\Nmwgocso.bat
<Current directory>\GoUy.exe
%TEMP%\EGwsYEAs.bat
C:\RCX6.tmp
%TEMP%\CmQAwcAQ.bat

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>\Pikk.ico
<Current directory>\hkka.exe
<Current directory>\BkEY.ico
<Current directory>\rUsI.exe
<Current directory>\doUo.ico
<Current directory>\tEQK.exe
<Current directory>\SYcQ.ico
<Current directory>\MMwC.exe
<Current directory>\ceUk.ico
<Current directory>\YAwq.exe
<Current directory>\Oqso.ico
<Current directory>\gUkk.exe
<Current directory>\vEkM.ico
<Current directory>\QEIc.exe
<Current directory>\EmQk.ico
<Current directory>\TcUy.exe
<Current directory>\DIAw.ico
<Current directory>\WgII.exe
<Current directory>\amEw.ico
<Current directory>\RwQQ.ico
<Current directory>\iygw.ico
<Current directory>\oMsU.exe
<Current directory>\peAg.ico
<Current directory>\boEE.exe
<Current directory>\zKgM.ico
<Current directory>\loEc.exe
<Current directory>\WUoc.ico
<Current directory>\xYgW.exe
<Current directory>\zKQM.ico
<Current directory>\uIIg.exe
<Current directory>\TYQc.exe
%TEMP%\sIwcoQkM.bat
<Current directory>\TKEE.ico
<Current directory>\tIAq.exe
<Current directory>\GYYq.exe
<Current directory>\IkMY.exe
%TEMP%\EUkYMwMg.bat
<Current directory>\hkQs.ico
%TEMP%\kCkQoIUs.bat
<Current directory>\SIwE.exe
%TEMP%\LuMAMMcc.bat
%TEMP%\KMcIsUsQ.bat
<Current directory>\kQsM.ico
<Current directory>\IwIY.ico
<Current directory>\EEYm.exe
%TEMP%\JMUYIsUw.bat
%TEMP%\EGMUUEQU.bat
<Current directory>\MUUM.ico
<Current directory>\eAAy.exe
<Current directory>\hkIS.exe
<Current directory>\XSIQ.ico
<Current directory>\PAQA.exe
<Current directory>\mWQw.ico
%TEMP%\saMUMooo.bat
<Current directory>\eosS.exe
%TEMP%\DEMQkUoQ.bat
<Current directory>\xcgU.ico
<Current directory>\sawc.ico
<Current directory>\VgAo.ico
<Current directory>\GoUy.exe
%TEMP%\Nmwgocso.bat

Moves the following files:

from C:\RCX11.tmp to <Current directory>\rUsI.exe
from C:\RCX12.tmp to <Current directory>\tEQK.exe
from C:\RCX13.tmp to <Current directory>\loEc.exe
from C:\RCXE.tmp to <Current directory>\QEIc.exe
from C:\RCXF.tmp to <Current directory>\MMwC.exe
from C:\RCX10.tmp to <Current directory>\hkka.exe
from C:\RCX17.tmp to <Current directory>\WgII.exe
from C:\RCX18.tmp to <Current directory>\TcUy.exe
from C:\RCX19.tmp to <Current directory>\oMsU.exe
from C:\RCX14.tmp to <Current directory>\boEE.exe
from C:\RCX15.tmp to <Current directory>\uIIg.exe
from C:\RCX16.tmp to <Current directory>\xYgW.exe
from C:\RCXD.tmp to <Current directory>\gUkk.exe
from C:\RCX4.tmp to <Current directory>\GYYq.exe
from C:\RCX5.tmp to <Current directory>\IkMY.exe
from C:\RCX6.tmp to <Current directory>\eosS.exe
from C:\RCX1.tmp to <Current directory>\SIwE.exe
from C:\RCX2.tmp to <Current directory>\EEYm.exe
from C:\RCX3.tmp to <Current directory>\tIAq.exe
from C:\RCXA.tmp to <Current directory>\PAQA.exe
from C:\RCXB.tmp to <Current directory>\TYQc.exe
from C:\RCXC.tmp to <Current directory>\YAwq.exe
from C:\RCX7.tmp to <Current directory>\GoUy.exe
from C:\RCX8.tmp to <Current directory>\eAAy.exe
from C:\RCX9.tmp to <Current directory>\hkIS.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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