Trojan.DownLoader12.31819

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%\aKIAcEII.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\MggIQMgo.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\imooUcco.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\CEUYIokg.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\PyYsQAQI.bat" "<Full path to virus>""
'<SYSTEM32>\reg.exe' /pid=2744
'<SYSTEM32>\cscript.exe' /pid=3032
'<SYSTEM32>\reg.exe' /pid=3340
'<SYSTEM32>\reg.exe' /c "<Current directory>\<Virus name>"
'<SYSTEM32>\cscript.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\reg.exe' /pid=3292
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\DKQYwAks.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\GGwUIIkg.bat" "<Full path to virus>""
'<SYSTEM32>\cscript.exe' %TEMP%\file.vbs
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\QgwsAUIw.bat" "<Full path to virus>""
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v HideFileExt /t REG_DWORD /d 1
'<SYSTEM32>\reg.exe' add HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /f /v Hidden /t REG_DWORD /d 2
'<SYSTEM32>\reg.exe' add HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /d 0 /t REG_DWORD /f
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\WUssYEEE.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\nUMAUUsc.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\rwsYYwMY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\WwwkIUgA.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\HeIQwQws.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\eyYIIsUY.bat" "<Full path to virus>""
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\YuUIgUcw.bat" "<Full path to virus>""

Injects code into

the following system processes:

<SYSTEM32>\reg.exe
<SYSTEM32>\cmd.exe
<SYSTEM32>\cscript.exe

Modifies file system :

Creates the following files:

C:\RCX29.tmp
<Current directory>\qQIE.exe
<Current directory>\ZIcE.ico
<Current directory>\bkgQ.ico
<Current directory>\Amow.ico
C:\RCX2A.tmp
<Current directory>\koYe.exe
<Current directory>\hYcQ.exe
<Current directory>\fsAY.ico
%TEMP%\PyYsQAQI.bat
C:\RCX27.tmp
C:\RCX28.tmp
<Current directory>\SIEw.exe
<Current directory>\fucA.ico
C:\RCX2D.tmp
<Current directory>\fccm.exe
<Current directory>\aMkY.ico
<Current directory>\xYog.ico
<Current directory>\KmcI.ico
C:\RCX2E.tmp
<Current directory>\focW.exe
%TEMP%\dQwYkwUQ.bat
C:\RCX2B.tmp
<Current directory>\sEYa.exe
<Current directory>\cEMU.ico
%TEMP%\aKIAcEII.bat
C:\RCX2C.tmp
<Current directory>\TQMm.exe
C:\RCX26.tmp
<Current directory>\dekE.ico
%TEMP%\LcsIkIUg.bat
C:\RCX20.tmp
<Current directory>\jYkk.exe
<Current directory>\uIgY.ico
%TEMP%\CEUYIokg.bat
C:\RCX21.tmp
C:\RCX1F.tmp
<Current directory>\mcUc.exe
<Current directory>\IAIc.ico
%TEMP%\XgsUcoEE.bat
<Current directory>\rQwM.exe
<Current directory>\BsUw.ico
%TEMP%\imooUcco.bat
<Current directory>\OEwi.exe
<Current directory>\oOgU.ico
C:\RCX24.tmp
C:\RCX25.tmp
<Current directory>\XYYe.exe
<Current directory>\tWow.ico
%TEMP%\YMAwEMAk.bat
<Current directory>\OQUY.ico
C:\RCX22.tmp
<Current directory>\OEoC.exe
<Current directory>\HEAW.exe
<Current directory>\iIcw.exe
<Current directory>\tokA.ico
C:\RCX23.tmp
<Current directory>\Wkcu.exe
<Current directory>\JOkU.ico
C:\RCX3A.tmp
<Current directory>\JMsq.exe
<Current directory>\hIoa.exe
<Current directory>\SYkO.exe
<Current directory>\TIwI.ico
C:\RCX3B.tmp
%TEMP%\DKQYwAks.bat
C:\RCX38.tmp
<Current directory>\fUsM.exe
<Current directory>\JmwQ.ico
<Current directory>\AiwI.ico
C:\RCX39.tmp
<Current directory>\RQAC.exe
C:\RCX3F.tmp
<Current directory>\koAM.exe
<Current directory>\XMcw.ico
%TEMP%\qqgQkQUU.bat
C:\RCX40.tmp
<Current directory>\qYsW.exe
<Current directory>\wAMA.ico
<Current directory>\vIgS.exe
<Current directory>\jMAU.ico
C:\RCX3C.tmp
C:\RCX3D.tmp
C:\RCX3E.tmp
<Current directory>\pAsq.exe
<Current directory>\HeAs.ico
<Current directory>\EeYg.ico
C:\RCX32.tmp
<Current directory>\HkkS.exe
<Current directory>\WkYo.ico
%TEMP%\fGcsEcUY.bat
%TEMP%\MggIQMgo.bat
<Current directory>\WooM.exe
<Current directory>\ryAI.ico
<Current directory>\EcQq.exe
<Current directory>\vCEQ.ico
C:\RCX2F.tmp
C:\RCX30.tmp
C:\RCX31.tmp
<Current directory>\AkYa.exe
<Current directory>\vEIc.ico
C:\RCX36.tmp
<Current directory>\zEcO.exe
<Current directory>\KSQE.ico
<Current directory>\SEwY.ico
%TEMP%\nAsoMoYc.bat
C:\RCX37.tmp
<Current directory>\YsUs.exe
<Current directory>\IAka.exe
<Current directory>\nWQg.ico
C:\RCX33.tmp
C:\RCX34.tmp
C:\RCX35.tmp
<Current directory>\vYsK.exe
<Current directory>\JqQw.ico
<Current directory>\KAMC.exe
<Current directory>\IAQc.ico
C:\RCX8.tmp
C:\RCX9.tmp
%TEMP%\gSogMsMA.bat
<Current directory>\iscQ.exe
<Current directory>\BQQk.ico
<Current directory>\MAwM.ico
C:\RCX6.tmp
<Current directory>\tUwU.exe
<Current directory>\PUUO.exe
<Current directory>\bUwk.exe
<Current directory>\GIoc.ico
C:\RCX7.tmp
<Current directory>\dIkQ.exe
<Current directory>\ZGYI.ico
C:\RCXC.tmp
C:\RCXD.tmp
C:\RCXE.tmp
<Current directory>\ZQYs.exe
<Current directory>\eEAI.ico
<Current directory>\wgMO.exe
<Current directory>\aggc.ico
C:\RCXA.tmp
%TEMP%\HeIQwQws.bat
<Current directory>\kgck.exe
<Current directory>\iOEc.ico
C:\RCXB.tmp
<Current directory>\GMgQ.ico
C:\RCX1.tmp
<Current directory>\cAEm.exe
<Current directory>\JWgE.ico
%TEMP%\GGwUIIkg.bat
%TEMP%\FCsEIgsQ.bat
<Current directory>\tsIE.ico
%TEMP%\file.vbs
%ALLUSERSPROFILE%\lwQggIEM\nwAEcgMA.exe
%ALLUSERSPROFILE%\vesswIQA\AcIcUcAM
%HOMEPATH%\NIMMEwsg\jaQEcQMQ
%ALLUSERSPROFILE%\casg.txt
<Current directory>\<Virus name>
%TEMP%\oQIIQwMI.bat
C:\Documents and Settings\LocalService\NIMMEwsg\jaQEcQMQ
<Current directory>\cski.exe
<Current directory>\UEwI.ico
C:\RCX3.tmp
C:\RCX4.tmp
C:\RCX5.tmp
<Current directory>\DIQc.exe
<Current directory>\uuYA.ico
<Current directory>\iwgE.exe
%TEMP%\lyEoAAgw.bat
%TEMP%\QgwsAUIw.bat
C:\RCX2.tmp
<Current directory>\EEoC.exe
<Current directory>\nsMo.ico
%TEMP%\WUssYEEE.bat
%TEMP%\GKMYwQwk.bat
%TEMP%\UAAUAAMY.bat
C:\RCX19.tmp
<Current directory>\KskO.exe
<Current directory>\iMAo.ico
C:\RCX1A.tmp
<Current directory>\IYsa.exe
%TEMP%\rwsYYwMY.bat
%TEMP%\nUMAUUsc.bat
C:\RCX17.tmp
<Current directory>\BUow.exe
<Current directory>\qIEQ.ico
<Current directory>\Duks.ico
C:\RCX18.tmp
<Current directory>\rkwU.exe
<Current directory>\oQUO.exe
<Current directory>\IqQA.ico
C:\RCX1C.tmp
C:\RCX1D.tmp
C:\RCX1E.tmp
<Current directory>\LEou.exe
<Current directory>\BwUA.ico
C:\RCX1B.tmp
<Current directory>\pokG.exe
<Current directory>\XGIU.ico
%TEMP%\yKgwkIgo.bat
%TEMP%\WwwkIUgA.bat
<Current directory>\jgES.exe
<Current directory>\fEkw.ico
<Current directory>\dMwY.ico
C:\RCX11.tmp
<Current directory>\KkEa.exe
<Current directory>\OgEM.ico
<Current directory>\SeEI.ico
<Current directory>\AAgg.ico
C:\RCX12.tmp
<Current directory>\zIUM.exe
C:\RCXF.tmp
<Current directory>\QcMG.exe
<Current directory>\JUoc.ico
%TEMP%\eyYIIsUY.bat
C:\RCX10.tmp
<Current directory>\MwUu.exe
<Current directory>\Gqoc.ico
C:\RCX15.tmp
<Current directory>\ToQM.exe
<Current directory>\QoEg.ico
<Current directory>\Docc.ico
%TEMP%\GUIwYwUI.bat
C:\RCX16.tmp
<Current directory>\PUwK.exe
<Current directory>\NyEY.ico
C:\RCX13.tmp
<Current directory>\GMwq.exe
%TEMP%\HMsAMIYU.bat
%TEMP%\YuUIgUcw.bat
C:\RCX14.tmp
<Current directory>\ToUO.exe

Deletes the following files:

<Current directory>\koYe.exe
<Current directory>\ZIcE.ico
<Current directory>\sEYa.exe
<Current directory>\bkgQ.ico
<Current directory>\SIEw.exe
<Current directory>\fsAY.ico
<Current directory>\qQIE.exe
<Current directory>\fucA.ico
<Current directory>\Amow.ico
<Current directory>\focW.exe
<Current directory>\aMkY.ico
<Current directory>\Wkcu.exe
<Current directory>\xYog.ico
<Current directory>\TQMm.exe
%TEMP%\dQwYkwUQ.bat
<Current directory>\fccm.exe
<Current directory>\cEMU.ico
<Current directory>\hYcQ.exe
<Current directory>\dekE.ico
<Current directory>\jYkk.exe
<Current directory>\uIgY.ico
<Current directory>\OEoC.exe
<Current directory>\rQwM.exe
%TEMP%\XgsUcoEE.bat
%TEMP%\LcsIkIUg.bat
<Current directory>\BsUw.ico
<Current directory>\HEAW.exe
%TEMP%\YMAwEMAk.bat
<Current directory>\oOgU.ico
<Current directory>\tWow.ico
<Current directory>\XYYe.exe
<Current directory>\iIcw.exe
<Current directory>\OQUY.ico
<Current directory>\OEwi.exe
<Current directory>\tokA.ico
<Current directory>\KmcI.ico
<Current directory>\AiwI.ico
<Current directory>\JMsq.exe
<Current directory>\JOkU.ico
<Current directory>\hIoa.exe
<Current directory>\EeYg.ico
<Current directory>\fUsM.exe
<Current directory>\JmwQ.ico
<Current directory>\RQAC.exe
<Current directory>\SYkO.exe
<Current directory>\koAM.exe
<Current directory>\HeAs.ico
%TEMP%\qqgQkQUU.bat
<Current directory>\XMcw.ico
<Current directory>\vIgS.exe
<Current directory>\TIwI.ico
<Current directory>\pAsq.exe
<Current directory>\jMAU.ico
<Current directory>\SEwY.ico
<Current directory>\HkkS.exe
%TEMP%\fGcsEcUY.bat
<Current directory>\WooM.exe
<Current directory>\WkYo.ico
<Current directory>\vCEQ.ico
<Current directory>\EcQq.exe
<Current directory>\vEIc.ico
<Current directory>\AkYa.exe
<Current directory>\ryAI.ico
<Current directory>\KSQE.ico
<Current directory>\zEcO.exe
%TEMP%\nAsoMoYc.bat
<Current directory>\YsUs.exe
<Current directory>\nWQg.ico
<Current directory>\IAka.exe
<Current directory>\JqQw.ico
<Current directory>\vYsK.exe
<Current directory>\BQQk.ico
<Current directory>\iscQ.exe
<Current directory>\aggc.ico
<Current directory>\wgMO.exe
<Current directory>\KAMC.exe
<Current directory>\GIoc.ico
%TEMP%\gSogMsMA.bat
<Current directory>\IAQc.ico
<Current directory>\kgck.exe
%TEMP%\GKMYwQwk.bat
<Current directory>\eEAI.ico
<Current directory>\JUoc.ico
<Current directory>\QcMG.exe
<Current directory>\dIkQ.exe
<Current directory>\iOEc.ico
<Current directory>\ZQYs.exe
<Current directory>\ZGYI.ico
<Current directory>\bUwk.exe
<Current directory>\iwgE.exe
%TEMP%\lyEoAAgw.bat
<Current directory>\EEoC.exe
<Current directory>\tsIE.ico
<Current directory>\cAEm.exe
%TEMP%\oQIIQwMI.bat
%TEMP%\FCsEIgsQ.bat
<Current directory>\JWgE.ico
<Current directory>\nsMo.ico
<Current directory>\GMgQ.ico
<Current directory>\tUwU.exe
<Current directory>\MAwM.ico
<Current directory>\PUUO.exe
<Current directory>\UEwI.ico
<Current directory>\cski.exe
<Current directory>\uuYA.ico
<Current directory>\DIQc.exe
<Current directory>\MwUu.exe
<Current directory>\iMAo.ico
<Current directory>\IYsa.exe
<Current directory>\XGIU.ico
<Current directory>\pokG.exe
<Current directory>\KskO.exe
<Current directory>\qIEQ.ico
%TEMP%\UAAUAAMY.bat
<Current directory>\Duks.ico
%TEMP%\yKgwkIgo.bat
<Current directory>\BwUA.ico
<Current directory>\LEou.exe
<Current directory>\IAIc.ico
<Current directory>\mcUc.exe
<Current directory>\fEkw.ico
<Current directory>\jgES.exe
<Current directory>\IqQA.ico
<Current directory>\oQUO.exe
<Current directory>\rkwU.exe
<Current directory>\GMwq.exe
<Current directory>\SeEI.ico
%TEMP%\HMsAMIYU.bat
<Current directory>\AAgg.ico
<Current directory>\KkEa.exe
<Current directory>\Gqoc.ico
<Current directory>\zIUM.exe
<Current directory>\OgEM.ico
<Current directory>\ToUO.exe
%TEMP%\GUIwYwUI.bat
<Current directory>\Docc.ico
<Current directory>\dMwY.ico
<Current directory>\BUow.exe
<Current directory>\ToQM.exe
<Current directory>\NyEY.ico
<Current directory>\PUwK.exe
<Current directory>\QoEg.ico

Moves the following files:

from C:\RCX2B.tmp to <Current directory>\sEYa.exe
from C:\RCX2A.tmp to <Current directory>\koYe.exe
from C:\RCX29.tmp to <Current directory>\qQIE.exe
from C:\RCX2C.tmp to <Current directory>\TQMm.exe
from C:\RCX2F.tmp to <Current directory>\Wkcu.exe
from C:\RCX2E.tmp to <Current directory>\focW.exe
from C:\RCX2D.tmp to <Current directory>\fccm.exe
from C:\RCX28.tmp to <Current directory>\SIEw.exe
from C:\RCX23.tmp to <Current directory>\HEAW.exe
from C:\RCX22.tmp to <Current directory>\OEoC.exe
from C:\RCX21.tmp to <Current directory>\jYkk.exe
from C:\RCX24.tmp to <Current directory>\iIcw.exe
from C:\RCX27.tmp to <Current directory>\hYcQ.exe
from C:\RCX26.tmp to <Current directory>\XYYe.exe
from C:\RCX25.tmp to <Current directory>\OEwi.exe
from C:\RCX30.tmp to <Current directory>\EcQq.exe
from C:\RCX3B.tmp to <Current directory>\hIoa.exe
from C:\RCX3A.tmp to <Current directory>\JMsq.exe
from C:\RCX39.tmp to <Current directory>\RQAC.exe
from C:\RCX3C.tmp to <Current directory>\SYkO.exe
from C:\RCX3F.tmp to <Current directory>\koAM.exe
from C:\RCX3E.tmp to <Current directory>\pAsq.exe
from C:\RCX3D.tmp to <Current directory>\vIgS.exe
from C:\RCX38.tmp to <Current directory>\fUsM.exe
from C:\RCX33.tmp to <Current directory>\WooM.exe
from C:\RCX32.tmp to <Current directory>\HkkS.exe
from C:\RCX31.tmp to <Current directory>\AkYa.exe
from C:\RCX34.tmp to <Current directory>\IAka.exe
from C:\RCX37.tmp to <Current directory>\YsUs.exe
from C:\RCX36.tmp to <Current directory>\zEcO.exe
from C:\RCX35.tmp to <Current directory>\vYsK.exe
from C:\RCX20.tmp to <Current directory>\rQwM.exe
from C:\RCXB.tmp to <Current directory>\wgMO.exe
from C:\RCXA.tmp to <Current directory>\iscQ.exe
from C:\RCX9.tmp to <Current directory>\KAMC.exe
from C:\RCXC.tmp to <Current directory>\kgck.exe
from C:\RCXF.tmp to <Current directory>\QcMG.exe
from C:\RCXE.tmp to <Current directory>\ZQYs.exe
from C:\RCXD.tmp to <Current directory>\dIkQ.exe
from C:\RCX8.tmp to <Current directory>\bUwk.exe
from C:\RCX3.tmp to <Current directory>\EEoC.exe
from C:\RCX2.tmp to <Current directory>\iwgE.exe
from C:\RCX1.tmp to <Current directory>\cAEm.exe
from C:\RCX4.tmp to <Current directory>\cski.exe
from C:\RCX7.tmp to <Current directory>\PUUO.exe
from C:\RCX6.tmp to <Current directory>\tUwU.exe
from C:\RCX5.tmp to <Current directory>\DIQc.exe
from C:\RCX10.tmp to <Current directory>\MwUu.exe
from C:\RCX1B.tmp to <Current directory>\pokG.exe
from C:\RCX1A.tmp to <Current directory>\IYsa.exe
from C:\RCX19.tmp to <Current directory>\KskO.exe
from C:\RCX1C.tmp to <Current directory>\jgES.exe
from C:\RCX1F.tmp to <Current directory>\mcUc.exe
from C:\RCX1E.tmp to <Current directory>\LEou.exe
from C:\RCX1D.tmp to <Current directory>\oQUO.exe
from C:\RCX18.tmp to <Current directory>\rkwU.exe
from C:\RCX13.tmp to <Current directory>\GMwq.exe
from C:\RCX12.tmp to <Current directory>\zIUM.exe
from C:\RCX11.tmp to <Current directory>\KkEa.exe
from C:\RCX14.tmp to <Current directory>\ToUO.exe
from C:\RCX17.tmp to <Current directory>\BUow.exe
from C:\RCX16.tmp to <Current directory>\PUwK.exe
from C:\RCX15.tmp to <Current directory>\ToQM.exe

Deletes itself.

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: 'AcIcUcAM.exe'
ClassName: 'Indicator' WindowName: ''
ClassName: '' WindowName: 'jaQEcQMQ.exe'

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