Trojan.DownLoader12.31805

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%\HsEEUYEI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\YsMkkosY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DgwYwgcQ.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\mMgEkoUY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\dIUsAsQI.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\ySkwYwYc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\uKoUgIUU.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%\lKocUkAg.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\UaEIwAUA.bat" "<Full path to virus>""

Modifies file system :

Creates the following files:

<Current directory>\vYku.exe
C:\RCX14.tmp
%TEMP%\mMgEkoUY.bat
<Current directory>\tgkE.ico
<Current directory>\BQcE.exe
C:\RCX13.tmp
%TEMP%\XeUAQIsE.bat
<Current directory>\rKQc.ico
%TEMP%\PewoscQM.bat
C:\RCX16.tmp
%TEMP%\gUsQEQMM.bat
<Current directory>\oMkC.exe
<Current directory>\rkwW.exe
C:\RCX15.tmp
<Current directory>\IgEU.ico
<Current directory>\Rgoc.ico
<Current directory>\ickY.ico
<Current directory>\XsIo.exe
C:\RCX10.tmp
C:\RCXF.tmp
%TEMP%\ySkwYwYc.bat
<Current directory>\UEEk.ico
<Current directory>\wgIY.exe
<Current directory>\ZSAI.ico
<Current directory>\QsUe.exe
%TEMP%\dIUsAsQI.bat
C:\RCX12.tmp
<Current directory>\dmoc.ico
<Current directory>\uYcy.exe
C:\RCX11.tmp
%TEMP%\iGUQUcwE.bat
C:\RCX1D.tmp
<Current directory>\jwQI.ico
<Current directory>\dEcu.exe
<Current directory>\QMkS.exe
<Current directory>\xkAU.exe
C:\RCX1C.tmp
<Current directory>\wSIs.ico
C:\RCX1E.tmp
<Current directory>\bcwQ.exe
<Current directory>\Siss.ico
<Current directory>\LcMm.exe
<Current directory>\MGUs.ico
<Current directory>\yqQo.ico
<Current directory>\Qkss.exe
C:\RCX1F.tmp
<Current directory>\Ywws.ico
<Current directory>\fIQc.exe
C:\RCX18.tmp
<Current directory>\zUYE.ico
<Current directory>\wkwU.ico
<Current directory>\bAMk.ico
<Current directory>\bkoG.exe
C:\RCX17.tmp
<Current directory>\VYMI.exe
<Current directory>\zCEA.ico
<Current directory>\IEAQ.exe
C:\RCX1B.tmp
C:\RCX1A.tmp
C:\RCX19.tmp
<Current directory>\PAYw.ico
<Current directory>\WoYi.exe
<Current directory>\yAwE.ico
<Current directory>\igoK.exe
C:\RCX4.tmp
C:\RCX3.tmp
%TEMP%\lKocUkAg.bat
<Current directory>\fQEk.ico
<Current directory>\fcMA.exe
%TEMP%\rIUAUIMQ.bat
<Current directory>\oEAk.ico
<Current directory>\toAE.exe
C:\RCX6.tmp
%TEMP%\uKoUgIUU.bat
<Current directory>\XaEU.ico
<Current directory>\uQYg.exe
C:\RCX5.tmp
C:\RCX2.tmp
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
<Current directory>\toQg.ico
%TEMP%\BCIIwAMk.bat
%ALLUSERSPROFILE%\casg.txt
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
<Current directory>\<Virus name>
%TEMP%\file.vbs
%TEMP%\osAsksAc.bat
<Current directory>\VUgC.exe
<Current directory>\oEgA.ico
<Current directory>\PYEi.exe
C:\RCX1.tmp
%TEMP%\UaEIwAUA.bat
C:\RCXB.tmp
<Current directory>\gyMQ.ico
<Current directory>\tkcy.exe
<Current directory>\tIAe.exe
C:\RCXA.tmp
%TEMP%\HsEEUYEI.bat
<Current directory>\AIkU.ico
C:\RCXC.tmp
%TEMP%\CqcskAgs.bat
<Current directory>\bQAg.exe
C:\RCXE.tmp
<Current directory>\PMsQ.ico
<Current directory>\dekw.ico
<Current directory>\xYMi.exe
C:\RCXD.tmp
%TEMP%\MacsAgok.bat
%TEMP%\DgwYwgcQ.bat
<Current directory>\RmYA.ico
<Current directory>\QMoK.exe
C:\RCX7.tmp
%TEMP%\HsYAkcUQ.bat
<Current directory>\leYI.ico
<Current directory>\fAAg.exe
%TEMP%\OYYcQsEA.bat
C:\RCX9.tmp
<Current directory>\yusY.ico
<Current directory>\UoIa.exe
<Current directory>\tgUS.exe
C:\RCX8.tmp
%TEMP%\YsMkkosY.bat
<Current directory>\Cwkk.ico

Deletes the following files:

<Current directory>\tgkE.ico
<Current directory>\rkwW.exe
<Current directory>\Rgoc.ico
<Current directory>\vYku.exe
<Current directory>\rKQc.ico
<Current directory>\IgEU.ico
<Current directory>\bkoG.exe
%TEMP%\PewoscQM.bat
<Current directory>\oMkC.exe
%TEMP%\iGUQUcwE.bat
<Current directory>\uYcy.exe
<Current directory>\XsIo.exe
<Current directory>\ickY.ico
<Current directory>\ZSAI.ico
%TEMP%\XeUAQIsE.bat
<Current directory>\BQcE.exe
<Current directory>\QsUe.exe
<Current directory>\dmoc.ico
<Current directory>\QMkS.exe
<Current directory>\wSIs.ico
<Current directory>\xkAU.exe
<Current directory>\Ywws.ico
<Current directory>\dEcu.exe
<Current directory>\yqQo.ico
<Current directory>\MGUs.ico
<Current directory>\jwQI.ico
<Current directory>\Qkss.exe
<Current directory>\wkwU.ico
<Current directory>\VYMI.exe
<Current directory>\bAMk.ico
<Current directory>\fIQc.exe
<Current directory>\zUYE.ico
<Current directory>\IEAQ.exe
<Current directory>\zCEA.ico
<Current directory>\WoYi.exe
<Current directory>\PAYw.ico
<Current directory>\UEEk.ico
<Current directory>\uQYg.exe
<Current directory>\XaEU.ico
<Current directory>\igoK.exe
<Current directory>\yAwE.ico
<Current directory>\toAE.exe
<Current directory>\fAAg.exe
<Current directory>\leYI.ico
<Current directory>\oEAk.ico
%TEMP%\HsYAkcUQ.bat
<Current directory>\toQg.ico
%TEMP%\osAsksAc.bat
%TEMP%\BCIIwAMk.bat
<Current directory>\PYEi.exe
<Current directory>\VUgC.exe
<Current directory>\fQEk.ico
%TEMP%\rIUAUIMQ.bat
<Current directory>\oEgA.ico
<Current directory>\fcMA.exe
<Current directory>\gyMQ.ico
<Current directory>\xYMi.exe
<Current directory>\AIkU.ico
<Current directory>\tkcy.exe
<Current directory>\dekw.ico
<Current directory>\PMsQ.ico
<Current directory>\wgIY.exe
%TEMP%\CqcskAgs.bat
<Current directory>\bQAg.exe
<Current directory>\RmYA.ico
<Current directory>\tgUS.exe
%TEMP%\OYYcQsEA.bat
<Current directory>\QMoK.exe
<Current directory>\Cwkk.ico
<Current directory>\yusY.ico
<Current directory>\tIAe.exe
%TEMP%\MacsAgok.bat
<Current directory>\UoIa.exe

Moves the following files:

from C:\RCX15.tmp to <Current directory>\rkwW.exe
from C:\RCX16.tmp to <Current directory>\oMkC.exe
from C:\RCX17.tmp to <Current directory>\bkoG.exe
from C:\RCX14.tmp to <Current directory>\vYku.exe
from C:\RCX11.tmp to <Current directory>\uYcy.exe
from C:\RCX12.tmp to <Current directory>\QsUe.exe
from C:\RCX13.tmp to <Current directory>\BQcE.exe
from C:\RCX18.tmp to <Current directory>\fIQc.exe
from C:\RCX1D.tmp to <Current directory>\QMkS.exe
from C:\RCX1E.tmp to <Current directory>\dEcu.exe
from C:\RCX1F.tmp to <Current directory>\Qkss.exe
from C:\RCX1C.tmp to <Current directory>\xkAU.exe
from C:\RCX19.tmp to <Current directory>\VYMI.exe
from C:\RCX1A.tmp to <Current directory>\WoYi.exe
from C:\RCX1B.tmp to <Current directory>\IEAQ.exe
from C:\RCX10.tmp to <Current directory>\XsIo.exe
from C:\RCX5.tmp to <Current directory>\uQYg.exe
from C:\RCX6.tmp to <Current directory>\toAE.exe
from C:\RCX7.tmp to <Current directory>\fAAg.exe
from C:\RCX4.tmp to <Current directory>\igoK.exe
from C:\RCX1.tmp to <Current directory>\PYEi.exe
from C:\RCX2.tmp to <Current directory>\VUgC.exe
from C:\RCX3.tmp to <Current directory>\fcMA.exe
from C:\RCX8.tmp to <Current directory>\QMoK.exe
from C:\RCXD.tmp to <Current directory>\xYMi.exe
from C:\RCXE.tmp to <Current directory>\bQAg.exe
from C:\RCXF.tmp to <Current directory>\wgIY.exe
from C:\RCXC.tmp to <Current directory>\tkcy.exe
from C:\RCX9.tmp to <Current directory>\tgUS.exe
from C:\RCXA.tmp to <Current directory>\UoIa.exe
from C:\RCXB.tmp to <Current directory>\tIAe.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'

テクノロジー

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