Trojan.DownLoader12.26665

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%\GesEQAEg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\qigMcgUU.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\xIQYkkcg.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\OkgoAkwI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\LwAEoEEs.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%\bIIogkkA.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\iwEEYswQ.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\EEEu.exe
C:\RCX14.tmp
<Current directory>\QUEk.ico
<Current directory>\qsoE.ico
<Current directory>\cwgE.ico
<Current directory>\AQYM.exe
C:\RCX13.tmp
<Current directory>\mYUq.exe
C:\RCX16.tmp
%TEMP%\GesEQAEg.bat
<Current directory>\OiIQ.ico
<Current directory>\hQMu.exe
C:\RCX15.tmp
%TEMP%\ewEIUQUY.bat
<Current directory>\UgsA.exe
%TEMP%\KmgMQIss.bat
C:\RCX10.tmp
<Current directory>\tykk.ico
<Current directory>\qcww.ico
<Current directory>\XMco.exe
C:\RCXF.tmp
<Current directory>\tagA.ico
<Current directory>\ysAQ.exe
C:\RCX12.tmp
C:\RCX11.tmp
%TEMP%\qigMcgUU.bat
<Current directory>\QGgE.ico
<Current directory>\JUAs.exe
C:\RCX1B.tmp
<Current directory>\jqYU.ico
<Current directory>\fUYC.exe
<Current directory>\JgYI.exe
C:\RCX1A.tmp
%TEMP%\OkgoAkwI.bat
<Current directory>\fiMk.ico
<Current directory>\rOcU.ico
<Current directory>\kQQU.exe
C:\RCX1E.tmp
C:\RCX1D.tmp
C:\RCX1C.tmp
<Current directory>\hWUA.ico
<Current directory>\YMku.exe
<Current directory>\EssS.exe
C:\RCX18.tmp
<Current directory>\kkQc.ico
<Current directory>\kqMU.ico
<Current directory>\nisA.ico
<Current directory>\UcEc.exe
C:\RCX17.tmp
<Current directory>\hkMY.ico
<Current directory>\Asou.exe
%TEMP%\ImQkskQE.bat
%TEMP%\LwAEoEEs.bat
<Current directory>\mEEi.exe
%TEMP%\GwQAMYkk.bat
C:\RCX19.tmp
C:\RCX3.tmp
<Current directory>\kcsY.ico
<Current directory>\zcwU.exe
<Current directory>\VMEi.exe
<Current directory>\fwoI.exe
C:\RCX2.tmp
<Current directory>\jkAc.ico
<Current directory>\Aqwo.ico
<Current directory>\rEUm.exe
C:\RCX6.tmp
C:\RCX5.tmp
C:\RCX4.tmp
<Current directory>\wiwQ.ico
<Current directory>\Fwci.exe
%TEMP%\geMIsQEM.bat
<Current directory>\<Virus name>
%ALLUSERSPROFILE%\casg.txt
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
C:\RCX1.tmp
%TEMP%\file.vbs
<Current directory>\CWwI.ico
%TEMP%\iwEEYswQ.bat
<Current directory>\bokg.ico
%TEMP%\xIgUkQsU.bat
<Current directory>\UYAE.exe
<Current directory>\Swoc.ico
<Current directory>\VcQA.exe
C:\RCXC.tmp
%TEMP%\ZOEQsQIA.bat
<Current directory>\rcII.ico
<Current directory>\RAwq.exe
C:\RCXB.tmp
<Current directory>\aKok.ico
<Current directory>\yIcu.exe
C:\RCXE.tmp
C:\RCXD.tmp
%TEMP%\xIQYkkcg.bat
<Current directory>\jQwo.ico
<Current directory>\mYsg.exe
%TEMP%\bIIogkkA.bat
<Current directory>\SsoQ.ico
<Current directory>\Egse.exe
C:\RCX7.tmp
%TEMP%\PUAAgQAU.bat
<Current directory>\xQAI.ico
<Current directory>\aUUe.exe
<Current directory>\TgoM.ico
<Current directory>\noEm.exe
C:\RCXA.tmp
C:\RCX9.tmp
C:\RCX8.tmp
<Current directory>\NCkA.ico
<Current directory>\wokK.exe

Deletes the following files:

<Current directory>\EEEu.exe
<Current directory>\qsoE.ico
<Current directory>\AQYM.exe
<Current directory>\cwgE.ico
%TEMP%\ewEIUQUY.bat
<Current directory>\mYUq.exe
<Current directory>\hQMu.exe
<Current directory>\QUEk.ico
<Current directory>\UgsA.exe
<Current directory>\tykk.ico
<Current directory>\qcww.ico
%TEMP%\KmgMQIss.bat
<Current directory>\ysAQ.exe
<Current directory>\tagA.ico
<Current directory>\JUAs.exe
<Current directory>\QGgE.ico
<Current directory>\OiIQ.ico
<Current directory>\JgYI.exe
<Current directory>\fiMk.ico
<Current directory>\Asou.exe
<Current directory>\hkMY.ico
<Current directory>\YMku.exe
<Current directory>\hWUA.ico
<Current directory>\fUYC.exe
<Current directory>\jqYU.ico
<Current directory>\EssS.exe
<Current directory>\kqMU.ico
<Current directory>\UcEc.exe
<Current directory>\nisA.ico
<Current directory>\kkQc.ico
%TEMP%\ImQkskQE.bat
%TEMP%\GwQAMYkk.bat
<Current directory>\mEEi.exe
<Current directory>\Fwci.exe
<Current directory>\wiwQ.ico
<Current directory>\zcwU.exe
<Current directory>\kcsY.ico
%TEMP%\PUAAgQAU.bat
<Current directory>\aUUe.exe
<Current directory>\rEUm.exe
<Current directory>\Aqwo.ico
<Current directory>\UYAE.exe
<Current directory>\bokg.ico
%TEMP%\geMIsQEM.bat
%TEMP%\xIgUkQsU.bat
<Current directory>\VMEi.exe
<Current directory>\jkAc.ico
<Current directory>\fwoI.exe
<Current directory>\CWwI.ico
<Current directory>\xQAI.ico
<Current directory>\Swoc.ico
<Current directory>\mYsg.exe
%TEMP%\ZOEQsQIA.bat
<Current directory>\VcQA.exe
<Current directory>\aKok.ico
<Current directory>\XMco.exe
<Current directory>\jQwo.ico
<Current directory>\yIcu.exe
<Current directory>\wokK.exe
<Current directory>\NCkA.ico
<Current directory>\Egse.exe
<Current directory>\SsoQ.ico
<Current directory>\RAwq.exe
<Current directory>\rcII.ico
<Current directory>\noEm.exe
<Current directory>\TgoM.ico

Moves the following files:

from C:\RCX14.tmp to <Current directory>\EEEu.exe
from C:\RCX15.tmp to <Current directory>\hQMu.exe
from C:\RCX16.tmp to <Current directory>\mYUq.exe
from C:\RCX13.tmp to <Current directory>\AQYM.exe
from C:\RCX10.tmp to <Current directory>\UgsA.exe
from C:\RCX11.tmp to <Current directory>\JUAs.exe
from C:\RCX12.tmp to <Current directory>\ysAQ.exe
from C:\RCX1B.tmp to <Current directory>\JgYI.exe
from C:\RCX1C.tmp to <Current directory>\fUYC.exe
from C:\RCX1D.tmp to <Current directory>\YMku.exe
from C:\RCX1A.tmp to <Current directory>\Asou.exe
from C:\RCX17.tmp to <Current directory>\UcEc.exe
from C:\RCX18.tmp to <Current directory>\EssS.exe
from C:\RCX19.tmp to <Current directory>\mEEi.exe
from C:\RCXF.tmp to <Current directory>\XMco.exe
from C:\RCX5.tmp to <Current directory>\Fwci.exe
from C:\RCX6.tmp to <Current directory>\rEUm.exe
from C:\RCX7.tmp to <Current directory>\aUUe.exe
from C:\RCX4.tmp to <Current directory>\zcwU.exe
from C:\RCX1.tmp to <Current directory>\UYAE.exe
from C:\RCX2.tmp to <Current directory>\fwoI.exe
from C:\RCX3.tmp to <Current directory>\VMEi.exe
from C:\RCXC.tmp to <Current directory>\VcQA.exe
from C:\RCXD.tmp to <Current directory>\mYsg.exe
from C:\RCXE.tmp to <Current directory>\yIcu.exe
from C:\RCXB.tmp to <Current directory>\RAwq.exe
from C:\RCX8.tmp to <Current directory>\Egse.exe
from C:\RCX9.tmp to <Current directory>\wokK.exe
from C:\RCXA.tmp to <Current directory>\noEm.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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