Trojan.DownLoader12.26662

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%\jMQUcAAQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\RYAkgooY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\bkYQUcIE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\jSsUYEgQ.bat" "<Full path to virus>""
'<SYSTEM32>\wbem\wmiadap.exe' /R /T
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\LQUUEkEM.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\oGAcQkQs.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%\FUYosMkw.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\baogQsUA.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

C:\RCX10.tmp
%TEMP%\hesYcEEY.bat
<Current directory>\wOkI.ico
C:\RCXF.tmp
<Current directory>\BGos.ico
<Current directory>\GIMW.exe
<Current directory>\iAYQ.ico
<Current directory>\Scki.exe
C:\RCX12.tmp
<Current directory>\mAAs.exe
C:\RCX11.tmp
%TEMP%\jSsUYEgQ.bat
%TEMP%\jMQUcAAQ.bat
<Current directory>\boYE.exe
C:\RCXD.tmp
<Current directory>\TksI.ico
<Current directory>\XEMi.exe
C:\RCXC.tmp
<Current directory>\gEAA.ico
<Current directory>\OqkA.ico
<Current directory>\Ggcs.exe
%TEMP%\LQUUEkEM.bat
<Current directory>\jkMc.exe
C:\RCXE.tmp
%TEMP%\jesggcwI.bat
<Current directory>\rIIw.ico
<Current directory>\zIwY.exe
C:\RCX18.tmp
%TEMP%\laocEIEA.bat
<Current directory>\dwwU.exe
C:\RCX17.tmp
<Current directory>\iuIo.ico
<Current directory>\jskY.exe
%TEMP%\UoAIwAwE.bat
%TEMP%\oawQAIYU.bat
<Current directory>\guEc.ico
<Current directory>\Gcoi.exe
<Current directory>\wMwo.ico
%TEMP%\ncUEUkAM.bat
<Current directory>\lIAO.exe
C:\RCX14.tmp
<Current directory>\oywc.ico
<Current directory>\aMcC.exe
C:\RCX13.tmp
<Current directory>\iKgk.ico
<Current directory>\aUQs.exe
C:\RCX16.tmp
<Current directory>\mAwE.ico
<Current directory>\ZMAy.exe
C:\RCX15.tmp
<Current directory>\PKAc.ico
<Current directory>\Byks.ico
<Current directory>\rEUs.ico
<Current directory>\ZEAg.exe
C:\RCX3.tmp
<Current directory>\QmQQ.ico
<Current directory>\QEww.exe
C:\RCX2.tmp
C:\RCX4.tmp
%TEMP%\FUYosMkw.bat
<Current directory>\Uwss.ico
%TEMP%\WEowwooE.bat
<Current directory>\aKwY.ico
<Current directory>\fkEK.exe
%TEMP%\file.vbs
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\uAsMUQoQ.bat
<Current directory>\<Virus name>
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%TEMP%\baogQsUA.bat
<Current directory>\JgYA.exe
C:\RCX1.tmp
%ALLUSERSPROFILE%\casg.txt
%TEMP%\kgUEQoQs.bat
<Current directory>\FeQE.ico
<Current directory>\hMgK.exe
C:\RCX9.tmp
<Current directory>\BkoA.ico
<Current directory>\CQgU.exe
%TEMP%\bkYQUcIE.bat
<Current directory>\LOws.ico
<Current directory>\Gkcm.exe
<Current directory>\EIUe.exe
C:\RCXB.tmp
%TEMP%\RYAkgooY.bat
C:\RCXA.tmp
%TEMP%\bGYIIEUI.bat
<Current directory>\oAcg.ico
C:\RCX8.tmp
<Current directory>\zEMc.exe
%TEMP%\oGAcQkQs.bat
C:\RCX6.tmp
C:\RCX5.tmp
%TEMP%\AoEUoYIE.bat
<Current directory>\nOQU.ico
<Current directory>\EScg.ico
<Current directory>\EsAM.exe
%TEMP%\jYMcQMsA.bat
<Current directory>\EyYA.ico
<Current directory>\LUIY.exe
C:\RCX7.tmp

Deletes the following files:

<Current directory>\mAAs.exe
%TEMP%\hesYcEEY.bat
<Current directory>\BGos.ico
<Current directory>\wOkI.ico
<Current directory>\aMcC.exe
<Current directory>\iAYQ.ico
<Current directory>\Scki.exe
<Current directory>\GIMW.exe
%TEMP%\jesggcwI.bat
<Current directory>\gEAA.ico
<Current directory>\boYE.exe
<Current directory>\jkMc.exe
<Current directory>\OqkA.ico
<Current directory>\Ggcs.exe
<Current directory>\TksI.ico
<Current directory>\zIwY.exe
<Current directory>\mAwE.ico
<Current directory>\dwwU.exe
<Current directory>\iuIo.ico
<SYSTEM32>\wbem\Performance\WmiApRpl.ini
%TEMP%\UoAIwAwE.bat
<Current directory>\guEc.ico
%TEMP%\ncUEUkAM.bat
<Current directory>\iKgk.ico
<Current directory>\lIAO.exe
<Current directory>\rIIw.ico
<Current directory>\ZMAy.exe
<Current directory>\PKAc.ico
<Current directory>\aUQs.exe
<Current directory>\oywc.ico
<Current directory>\aKwY.ico
<Current directory>\fkEK.exe
%TEMP%\WEowwooE.bat
<Current directory>\hMgK.exe
<Current directory>\zEMc.exe
%TEMP%\AoEUoYIE.bat
<Current directory>\Uwss.ico
<Current directory>\rEUs.ico
<Current directory>\JgYA.exe
%TEMP%\kgUEQoQs.bat
%TEMP%\uAsMUQoQ.bat
<Current directory>\FeQE.ico
<Current directory>\ZEAg.exe
<Current directory>\QmQQ.ico
<Current directory>\QEww.exe
%TEMP%\bGYIIEUI.bat
<Current directory>\BkoA.ico
<Current directory>\CQgU.exe
<Current directory>\EIUe.exe
<Current directory>\Byks.ico
<Current directory>\XEMi.exe
<Current directory>\oAcg.ico
<Current directory>\LOws.ico
<Current directory>\EyYA.ico
<Current directory>\LUIY.exe
<Current directory>\nOQU.ico
%TEMP%\jYMcQMsA.bat
<Current directory>\Gkcm.exe
<Current directory>\EScg.ico
<Current directory>\EsAM.exe

Moves the following files:

from C:\RCX10.tmp to <Current directory>\GIMW.exe
from C:\RCX11.tmp to <Current directory>\mAAs.exe
from C:\RCX12.tmp to <Current directory>\Scki.exe
from C:\RCXD.tmp to <Current directory>\boYE.exe
from C:\RCXE.tmp to <Current directory>\jkMc.exe
from C:\RCXF.tmp to <Current directory>\Ggcs.exe
from C:\RCX16.tmp to <Current directory>\aUQs.exe
from C:\RCX17.tmp to <Current directory>\dwwU.exe
from C:\RCX18.tmp to <Current directory>\zIwY.exe
from C:\RCX13.tmp to <Current directory>\aMcC.exe
from C:\RCX14.tmp to <Current directory>\lIAO.exe
from C:\RCX15.tmp to <Current directory>\ZMAy.exe
from C:\RCX4.tmp to <Current directory>\fkEK.exe
from C:\RCX5.tmp to <Current directory>\hMgK.exe
from C:\RCX6.tmp to <Current directory>\zEMc.exe
from C:\RCX1.tmp to <Current directory>\JgYA.exe
from C:\RCX2.tmp to <Current directory>\QEww.exe
from C:\RCX3.tmp to <Current directory>\ZEAg.exe
from C:\RCXA.tmp to <Current directory>\CQgU.exe
from C:\RCXB.tmp to <Current directory>\EIUe.exe
from C:\RCXC.tmp to <Current directory>\XEMi.exe
from C:\RCX7.tmp to <Current directory>\LUIY.exe
from C:\RCX8.tmp to <Current directory>\EsAM.exe
from C:\RCX9.tmp to <Current directory>\Gkcm.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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