Trojan.DownLoader12.26691

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%\oCoYsIYI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\vGgUQAgs.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UucAEMIs.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\VOQMoQgg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\XuoowEco.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\qCYIIQkc.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%\TQoAgUcs.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ZeckcooM.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\SUkQ.exe
C:\RCX11.tmp
<Current directory>\WIcg.ico
C:\RCX10.tmp
%TEMP%\oCoYsIYI.bat
<Current directory>\JqkQ.ico
<Current directory>\SIMw.exe
C:\RCX13.tmp
%TEMP%\syMwQMAc.bat
<Current directory>\kmIE.ico
C:\RCX12.tmp
<Current directory>\oSMw.ico
<Current directory>\dkAe.exe
C:\RCXD.tmp
<Current directory>\jqAQ.ico
<Current directory>\Rkks.exe
C:\RCXC.tmp
<Current directory>\WAAI.ico
<Current directory>\NgYk.exe
C:\RCXE.tmp
C:\RCXF.tmp
<Current directory>\zIUU.ico
<Current directory>\NsEO.exe
%TEMP%\roAcQUYE.bat
<Current directory>\eEUE.ico
<Current directory>\NMAi.exe
<Current directory>\nsAY.exe
<Current directory>\Cksc.ico
<Current directory>\sYEU.exe
C:\RCX19.tmp
<Current directory>\JysY.ico
<Current directory>\pQoG.exe
C:\RCX18.tmp
<Current directory>\lqgk.ico
%TEMP%\KKEYoAcA.bat
<Current directory>\fIIS.exe
%TEMP%\fkgscEYs.bat
<Current directory>\yssi.exe
%TEMP%\EkkMUogU.bat
<Current directory>\KMMo.ico
<Current directory>\qAMM.exe
C:\RCX15.tmp
<Current directory>\uOME.ico
%TEMP%\XuoowEco.bat
C:\RCX14.tmp
<Current directory>\qUQA.ico
<Current directory>\EgcI.exe
C:\RCX17.tmp
%TEMP%\CUoYcocs.bat
%TEMP%\VOQMoQgg.bat
C:\RCX16.tmp
<Current directory>\TUUA.ico
<Current directory>\vcgW.exe
%TEMP%\SioQcooo.bat
%TEMP%\qCYIIQkc.bat
<Current directory>\zYgG.exe
%TEMP%\zoYwAckA.bat
<Current directory>\TCIc.ico
%TEMP%\TQoAgUcs.bat
C:\RCX2.tmp
<Current directory>\xEIQ.ico
<Current directory>\rUAm.exe
C:\RCX4.tmp
<Current directory>\fyIg.ico
<Current directory>\JQsa.exe
C:\RCX3.tmp
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\VsMQwIQE.bat
<Current directory>\<Virus name>
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\casg.txt
<Current directory>\PMYq.exe
%TEMP%\file.vbs
C:\RCX1.tmp
<Current directory>\xUQA.ico
%TEMP%\HmQkocwI.bat
%TEMP%\ZeckcooM.bat
%TEMP%\joQMkoQI.bat
<Current directory>\mEgS.exe
C:\RCX9.tmp
<Current directory>\xusI.ico
C:\RCX8.tmp
%TEMP%\vGgUQAgs.bat
<Current directory>\eYsI.ico
<Current directory>\esgQ.exe
C:\RCXB.tmp
<Current directory>\rWYg.ico
<Current directory>\wIAk.exe
C:\RCXA.tmp
<Current directory>\fWAg.ico
<Current directory>\ZEsq.exe
C:\RCX5.tmp
<Current directory>\UgYk.ico
<Current directory>\lgQq.exe
%TEMP%\UucAEMIs.bat
<Current directory>\WoQo.ico
<Current directory>\cIAC.exe
C:\RCX6.tmp
%TEMP%\zIMYwwkM.bat
<Current directory>\Cwog.ico
<Current directory>\pIsi.exe
<Current directory>\HSEg.ico
<Current directory>\ZYQW.exe
C:\RCX7.tmp

Deletes the following files:

<Current directory>\SIMw.exe
<Current directory>\JqkQ.ico
<Current directory>\SUkQ.exe
<Current directory>\WIcg.ico
%TEMP%\syMwQMAc.bat
<Current directory>\oSMw.ico
<Current directory>\dkAe.exe
<Current directory>\zIUU.ico
<Current directory>\jqAQ.ico
<Current directory>\Rkks.exe
<Current directory>\WAAI.ico
%TEMP%\roAcQUYE.bat
<Current directory>\NsEO.exe
<Current directory>\eEUE.ico
<Current directory>\NMAi.exe
<Current directory>\JysY.ico
<Current directory>\pQoG.exe
<Current directory>\TUUA.ico
<Current directory>\sYEU.exe
%TEMP%\EkkMUogU.bat
<Current directory>\lqgk.ico
<Current directory>\Cksc.ico
<Current directory>\vcgW.exe
<Current directory>\qAMM.exe
<Current directory>\kmIE.ico
<Current directory>\nsAY.exe
<Current directory>\qUQA.ico
%TEMP%\CUoYcocs.bat
<Current directory>\uOME.ico
<Current directory>\EgcI.exe
<Current directory>\NgYk.exe
%TEMP%\joQMkoQI.bat
<Current directory>\fyIg.ico
<Current directory>\JQsa.exe
<Current directory>\rUAm.exe
<Current directory>\WoQo.ico
<Current directory>\cIAC.exe
<Current directory>\xEIQ.ico
<Current directory>\TCIc.ico
<Current directory>\PMYq.exe
%TEMP%\HmQkocwI.bat
%TEMP%\VsMQwIQE.bat
<Current directory>\xUQA.ico
<Current directory>\zYgG.exe
%TEMP%\SioQcooo.bat
%TEMP%\zoYwAckA.bat
<Current directory>\xusI.ico
<Current directory>\esgQ.exe
<Current directory>\eYsI.ico
<Current directory>\ZEsq.exe
<Current directory>\rWYg.ico
<Current directory>\wIAk.exe
<Current directory>\fWAg.ico
<Current directory>\mEgS.exe
<Current directory>\ZYQW.exe
<Current directory>\UgYk.ico
<Current directory>\lgQq.exe
%TEMP%\zIMYwwkM.bat
<Current directory>\Cwog.ico
<Current directory>\pIsi.exe
<Current directory>\HSEg.ico

Moves the following files:

from C:\RCX11.tmp to <Current directory>\SUkQ.exe
from C:\RCX12.tmp to <Current directory>\SIMw.exe
from C:\RCX13.tmp to <Current directory>\dkAe.exe
from C:\RCXE.tmp to <Current directory>\Rkks.exe
from C:\RCXF.tmp to <Current directory>\NMAi.exe
from C:\RCX10.tmp to <Current directory>\NsEO.exe
from C:\RCX17.tmp to <Current directory>\vcgW.exe
from C:\RCX18.tmp to <Current directory>\pQoG.exe
from C:\RCX19.tmp to <Current directory>\sYEU.exe
from C:\RCX14.tmp to <Current directory>\nsAY.exe
from C:\RCX15.tmp to <Current directory>\qAMM.exe
from C:\RCX16.tmp to <Current directory>\EgcI.exe
from C:\RCXD.tmp to <Current directory>\NgYk.exe
from C:\RCX4.tmp to <Current directory>\rUAm.exe
from C:\RCX5.tmp to <Current directory>\cIAC.exe
from C:\RCX6.tmp to <Current directory>\lgQq.exe
from C:\RCX1.tmp to <Current directory>\PMYq.exe
from C:\RCX2.tmp to <Current directory>\zYgG.exe
from C:\RCX3.tmp to <Current directory>\JQsa.exe
from C:\RCXA.tmp to <Current directory>\esgQ.exe
from C:\RCXB.tmp to <Current directory>\ZEsq.exe
from C:\RCXC.tmp to <Current directory>\wIAk.exe
from C:\RCX7.tmp to <Current directory>\ZYQW.exe
from C:\RCX8.tmp to <Current directory>\pIsi.exe
from C:\RCX9.tmp to <Current directory>\mEgS.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: 'jaQEcQMQ.exe'
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: '' WindowName: 'Microsoft Windows'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'AcIcUcAM.exe'

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