Trojan.DownLoader12.24566

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'
'%TEMP%\Drwebwcl.exe'
'%HOMEPATH%\NIMMEwsg\jaQEcQMQ.exe'
'%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM.exe'

Executes the following:

'<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

Modifies file system :

Creates the following files:

C:\RCX16.tmp
<Current directory>\AqcM.ico
<Current directory>\PQkc.exe
C:\RCX15.tmp
<Current directory>\VIgs.ico
<Current directory>\VAAo.exe
C:\RCX17.tmp
<Current directory>\IQYg.ico
<Current directory>\RIQE.exe
C:\RCX19.tmp
<Current directory>\Jwko.ico
<Current directory>\MMgg.exe
C:\RCX18.tmp
<Current directory>\IMIi.exe
<Current directory>\fEMw.ico
<Current directory>\QgMM.exe
C:\RCX12.tmp
<Current directory>\vSoU.ico
<Current directory>\YUUQ.exe
C:\RCX11.tmp
<Current directory>\kiUg.ico
<Current directory>\roMO.exe
C:\RCX14.tmp
<Current directory>\bcAM.ico
<Current directory>\boQK.exe
C:\RCX13.tmp
<Current directory>\tWcE.ico
C:\RCX1F.tmp
<Current directory>\ceks.ico
<Current directory>\TwgO.exe
C:\RCX1E.tmp
<Current directory>\AEMg.ico
<Current directory>\zccu.exe
C:\RCX20.tmp
<Current directory>\tcQM.ico
<Current directory>\ckAa.exe
C:\RCX22.tmp
<Current directory>\USUQ.ico
<Current directory>\TskQ.exe
C:\RCX21.tmp
<Current directory>\QgkM.exe
<Current directory>\UocU.ico
<Current directory>\FwAo.exe
C:\RCX1B.tmp
<Current directory>\yoMc.ico
<Current directory>\MMAk.exe
C:\RCX1A.tmp
<Current directory>\tSwM.ico
<Current directory>\lcwc.exe
C:\RCX1D.tmp
<Current directory>\VUYU.ico
<Current directory>\loga.exe
C:\RCX1C.tmp
<Current directory>\KucI.ico
C:\RCX10.tmp
<Current directory>\lYcQ.exe
C:\RCX4.tmp
<Current directory>\DEoo.ico
<Current directory>\FQYo.exe
C:\RCX3.tmp
<Current directory>\FUkA.ico
<Current directory>\LkUq.exe
C:\RCX6.tmp
<Current directory>\sccw.ico
<Current directory>\zwcO.exe
C:\RCX5.tmp
<Current directory>\locI.ico
<Current directory>\TIUG.exe
<Current directory>\zAMs.ico
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
%TEMP%\bWUAQgYw.bat
%TEMP%\Drwebwcl.exe
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\casg.txt
<Current directory>\bqMo.ico
<Current directory>\YMMa.exe
C:\RCX2.tmp
<Current directory>\fIYg.ico
<Current directory>\mQYm.exe
C:\RCX1.tmp
<Current directory>\KoAK.exe
C:\RCXD.tmp
<Current directory>\qskY.ico
<Current directory>\IwAg.exe
C:\RCXC.tmp
<Current directory>\pMEs.ico
<Current directory>\qsYO.exe
C:\RCXF.tmp
<Current directory>\ruUE.ico
<Current directory>\eYcw.exe
C:\RCXE.tmp
<Current directory>\zEIc.ico
<Current directory>\rccc.exe
<Current directory>\YOUI.ico
C:\RCX8.tmp
<Current directory>\rUks.ico
<Current directory>\QIgS.exe
C:\RCX7.tmp
<Current directory>\cgkI.ico
<Current directory>\Wcsm.exe
C:\RCX9.tmp
<Current directory>\rQss.ico
<Current directory>\hksC.exe
C:\RCXB.tmp
<Current directory>\ycQU.ico
<Current directory>\KMMi.exe
C:\RCXA.tmp

Deletes the following files:

<Current directory>\VIgs.ico
<Current directory>\PQkc.exe
<Current directory>\bcAM.ico
<Current directory>\VAAo.exe
<Current directory>\Jwko.ico
<Current directory>\RIQE.exe
<Current directory>\AqcM.ico
<Current directory>\MMgg.exe
<Current directory>\fEMw.ico
<Current directory>\boQK.exe
<Current directory>\vSoU.ico
<Current directory>\QgMM.exe
<Current directory>\tWcE.ico
<Current directory>\IMIi.exe
<Current directory>\kiUg.ico
<Current directory>\roMO.exe
<Current directory>\IQYg.ico
<Current directory>\zccu.exe
<Current directory>\AEMg.ico
<Current directory>\QgkM.exe
<Current directory>\VUYU.ico
<Current directory>\TskQ.exe
<Current directory>\USUQ.ico
<Current directory>\TwgO.exe
<Current directory>\ceks.ico
<Current directory>\FwAo.exe
<Current directory>\UocU.ico
<Current directory>\MMAk.exe
<Current directory>\yoMc.ico
<Current directory>\lcwc.exe
<Current directory>\KucI.ico
<Current directory>\loga.exe
<Current directory>\tSwM.ico
<Current directory>\YUUQ.exe
<Current directory>\DEoo.ico
<Current directory>\TIUG.exe
<Current directory>\FUkA.ico
<Current directory>\LkUq.exe
<Current directory>\sccw.ico
<Current directory>\Wcsm.exe
<Current directory>\locI.ico
<Current directory>\zwcO.exe
<Current directory>\fIYg.ico
<Current directory>\YMMa.exe
%TEMP%\bWUAQgYw.bat
<Current directory>\mQYm.exe
<Current directory>\zAMs.ico
<Current directory>\lYcQ.exe
<Current directory>\bqMo.ico
<Current directory>\FQYo.exe
<Current directory>\cgkI.ico
<Current directory>\qsYO.exe
<Current directory>\qskY.ico
<Current directory>\KoAK.exe
<Current directory>\pMEs.ico
<Current directory>\eYcw.exe
<Current directory>\ruUE.ico
<Current directory>\rccc.exe
<Current directory>\zEIc.ico
<Current directory>\KMMi.exe
<Current directory>\ycQU.ico
<Current directory>\QIgS.exe
<Current directory>\rUks.ico
<Current directory>\IwAg.exe
<Current directory>\YOUI.ico
<Current directory>\hksC.exe
<Current directory>\rQss.ico

Moves the following files:

from C:\RCX17.tmp to <Current directory>\PQkc.exe
from C:\RCX16.tmp to <Current directory>\VAAo.exe
from C:\RCX19.tmp to <Current directory>\RIQE.exe
from C:\RCX18.tmp to <Current directory>\MMgg.exe
from C:\RCX13.tmp to <Current directory>\boQK.exe
from C:\RCX12.tmp to <Current directory>\QgMM.exe
from C:\RCX15.tmp to <Current directory>\IMIi.exe
from C:\RCX14.tmp to <Current directory>\roMO.exe
from C:\RCX1F.tmp to <Current directory>\zccu.exe
from C:\RCX1E.tmp to <Current directory>\QgkM.exe
from C:\RCX21.tmp to <Current directory>\TskQ.exe
from C:\RCX20.tmp to <Current directory>\TwgO.exe
from C:\RCX1B.tmp to <Current directory>\FwAo.exe
from C:\RCX1A.tmp to <Current directory>\MMAk.exe
from C:\RCX1D.tmp to <Current directory>\lcwc.exe
from C:\RCX1C.tmp to <Current directory>\loga.exe
from C:\RCX11.tmp to <Current directory>\YUUQ.exe
from C:\RCX6.tmp to <Current directory>\TIUG.exe
from C:\RCX5.tmp to <Current directory>\LkUq.exe
from C:\RCX8.tmp to <Current directory>\Wcsm.exe
from C:\RCX7.tmp to <Current directory>\zwcO.exe
from C:\RCX2.tmp to <Current directory>\YMMa.exe
from C:\RCX1.tmp to <Current directory>\mQYm.exe
from C:\RCX4.tmp to <Current directory>\lYcQ.exe
from C:\RCX3.tmp to <Current directory>\FQYo.exe
from C:\RCXE.tmp to <Current directory>\qsYO.exe
from C:\RCXD.tmp to <Current directory>\KoAK.exe
from C:\RCX10.tmp to <Current directory>\eYcw.exe
from C:\RCXF.tmp to <Current directory>\rccc.exe
from C:\RCXA.tmp to <Current directory>\KMMi.exe
from C:\RCX9.tmp to <Current directory>\QIgS.exe
from C:\RCXC.tmp to <Current directory>\IwAg.exe
from C:\RCXB.tmp to <Current directory>\hksC.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: 'AcIcUcAM.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'jaQEcQMQ.exe'

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