Trojan.StartPage.48881

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Classes\regedit\shell\open\command] '' = 'regedit.exe %1'
[<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Microsoft\Command Processor] 'AutoRun' = ''
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\cfexefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\cmdfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\regfile\shell\open\command] '' = 'regedit.exe "%1"'

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\wuauserv] 'Start' = '00000002'

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

Creates and executes the following:

C:\ComboFix\swreg.cfexe save "hku\.default\software\microsoft\windows\currentversion\explorer\shell folders" temp00.hiv
C:\ComboFix\sed.cfexe "s/.*$/@&/"
C:\ComboFix\swreg.cfexe save "hklm\software\microsoft\windows\currentversion\internet settings\activex cache" temp00.hiv
C:\ComboFix\dumphive.cfexe temp00.hiv runs.cf
C:\ComboFix\setpath.cfexe
C:\ComboFix\swreg.cfexe query hkcr\clsid\{9f143c3a-1457-6cca-03a7-7aa23b61e40f}\inprocserver32 /ve
C:\ComboFix\swreg.cfexe delete "hkcu\software\microsoft\windows\currentversion\policies\system" /v "disableregistrytools"
C:\ComboFix\regt.cfexe /s creg.cf
C:\ComboFix\sed.cfexe "/:\\/!d;s/.*\t//"
C:\ComboFix\sed.cfexe -n "s/.*> *//;s/ .*//p"
C:\ComboFix\nircmd.cfexe sysrefresh intl
C:\ComboFix\regt.cfexe /s region.cf
C:\ComboFix\swreg.cfexe query hklm\software\swearware
C:\ComboFix\nircmd.cfexe sysrefresh
C:\ComboFix\swreg.cfexe copy "hku\.default\control panel\international" "hku\.default\control panel\international_combofixbackup" /s
C:\ComboFix\nircmd.cfexe killprocess regt.cfexe
C:\ComboFix\vfind.cfexe -mrtd *
C:\ComboFix\swreg.cfexe copy "hkcu\control panel\international" "hkcu\control panel\international_combofixbackup" /s
C:\ComboFix\swreg.cfexe query "hkcu\control panel\international_combofixbackup"
C:\ComboFix\swreg.exe add hkcr\cfexefile\defaulticon /ve /d explorer.exe,-111
C:\ComboFix\swreg.exe copy hkcr\exefile hkcr\cfexefile /s
C:\ComboFix\nircmd.cfexe killprocess thguard.exe
C:\ComboFix\swreg.exe add hkcr\cf_auto_file\defaulticon /ve /d shell32.dll,-154
C:\ComboFix\swreg.exe add hkcr\.cfexe /ve /d cfexefile
<Current directory>\ComboFixT\nircmd.exe exec hide Start.bat
<Current directory>\ComboFixT\nircmd.exe regdelval "hkcu\software\policies\microsoft\windows\system" "disablecmd"
C:\ComboFix\swreg.exe query hklm\system\currentcontrolset\enum\root\system
<Current directory>\ComboFixT\nircmd.exe win close class "cabinetwclass"
C:\ComboFix\nircmd.cfexe killprocess bryato.exe
C:\ComboFix\nircmd.cfexe killprocess verclsid.dat
C:\ComboFix\nircmd.cfexe killprocess OSO.EXE
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\session manager\environment" /v comspec
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\session manager\environment" /v path
C:\ComboFix\nircmd.cfexe killprocess rundl132.exe
C:\ComboFix\nircmd.cfexe killprocess fubcwj.exe
C:\ComboFix\nircmd.cfexe killprocess conime.exe
C:\ComboFix\nircmd.cfexe killprocess logo1_.exe
C:\ComboFix\nircmd.cfexe killprocess severe.exe

Executes the following:

<SYSTEM32>\find.exe "%USERNAME%"
<SYSTEM32>\find.exe "\"
<SYSTEM32>\chcp.com
<SYSTEM32>\find.exe "\\"
<SYSTEM32>\findstr.exe . 3rr
<SYSTEM32>\find.exe /i "combofix"
<SYSTEM32>\chcp.com 437
<SYSTEM32>\find.exe "Windows 2000"
<SYSTEM32>\findstr.exe /i ComboFix-Do
<SYSTEM32>\find.exe /i "C:\ComboFix"
<SYSTEM32>\find.exe /i "path"
<SYSTEM32>\cmd.exe /c Start.bat
<SYSTEM32>\find.exe "Windows XP"
<SYSTEM32>\findstr.exe /i reg_expand_sz ~
<SYSTEM32>\findstr.exe /i /l "%systemroot%\\system32\\cmd.exe C:\\WINDOWS\\system32\\cmd.exe" ~
<SYSTEM32>\findstr.exe /m /i /f:/ update_load
<SYSTEM32>\findstr.exe /i /l "%systemroot%\\system32;%systemroot%;%systemroot%\\system32\\wbem C:\\WINDOWS\\system32;C:\\WINDOWS;C:\\WINDOWS\\system32\\wbem" ~
<SYSTEM32>\find.exe /i "reg_expand_sz"

Modifies settings of Windows Internet Explorer:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '2102' = '00000003'

Sets a new unauthorized home page for Windows Internet Explorer.

Modifies file system :

Creates the following files:

<Current directory>\ComboFixT\ERDNTDOS.LOC
<Current directory>\ComboFixT\ERDNTWIN.LOC
<Current directory>\ComboFixT\ERDNT.e_e
<Current directory>\ComboFixT\swxcacls.cfexe
<Current directory>\ComboFixT\vfind.cfexe
C:\ComboFix\nircmd.cfexe
C:\ComboFix\~
C:\ComboFix\swreg.cfexe
<Current directory>\ComboFixT\ERUNT.LOC
<Current directory>\ComboFixT\findcombo.vbs
<Current directory>\ComboFixT\Ntrights.cfexe
<Current directory>\ComboFixT\regbindump.cfexe
<Current directory>\ComboFixT\mtee.cfexe
<Current directory>\ComboFixT\handle.cfexe
<Current directory>\ComboFixT\moveex.cfexe
<Current directory>\ComboFixT\SF.cfexe
<Current directory>\ComboFixT\swsc.cfexe
<Current directory>\ComboFixT\setpath.cfexe
<Current directory>\ComboFixT\RestartIt.cfexe
<Current directory>\ComboFixT\sed.cfexe
C:\ComboFix\attr.cf
C:\ComboFix\Cfiles.cf
C:\ComboFix\miscfile.cf
C:\ComboFix\winlogondef.cf
C:\ComboFix\net_svc.cf
C:\ComboFix\vundonames.cf
C:\ComboFix\zhsvc.cf
C:\ComboFix\borlander_folder.cf
C:\ComboFix\Cfolders.cf
C:\ComboFix\borlander_file.cf
C:\ComboFix\temp00.hiv
C:\ComboFix\runs.cf
C:\ComboFix\setpath.bat
C:\ComboFix\regt.cfexe
C:\ComboFix\ErrDbg.cf
C:\ComboFix\dll_whitelist.cf
C:\ComboFix\whitedir.cf
C:\ComboFix\dnd.cf
C:\ComboFix\appdatafolders.cf
C:\ComboFix.txt.bat
<Current directory>\ComboFixT\ERUNT.cfexe
<Current directory>\Start.bat
<Current directory>\ComboFixT\Sys.bat
<Current directory>\ComboFixT\Qoo.bat
<Current directory>\ComboFixT\MoveIt.bat
<Current directory>\ComboFixT\NTP.bat
<Current directory>\ComboFixT\swreg.exe
<Current directory>\ComboFixT\bad_netsvc.cf
<Current directory>\ComboFixT\NTPBack.exe
<Current directory>\ComboFixT\nircmd.exe
<Current directory>\ComboFixT\ntp.exe
<Current directory>\ComboFixT\Combobatch.bat
<Current directory>\ComboFixT\ComboFix.bat
<Current directory>\ComboFixT\CFCleanUp.bat
<Current directory>\ComboFixT\Boot.bat
<Current directory>\ComboFixT\CF_anti-viking.bat
<Current directory>\ComboFixT\List-C.bat
<Current directory>\ComboFixT\Look2Me.bat
<Current directory>\ComboFixT\history.bat
<Current directory>\ComboFixT\FIND3M.bat
<Current directory>\ComboFixT\FixLSP.bat
<Current directory>\ComboFixT\v_combofix.cf
<Current directory>\ComboFixT\whitedirB.cf
<Current directory>\ComboFixT\svc_wht.cf
<Current directory>\ComboFixT\Qoo2_combofix.cf
<Current directory>\ComboFixT\region.cf
<Current directory>\ComboFixT\dd.cfexe
<Current directory>\ComboFixT\dumphive.cfexe
<Current directory>\ComboFixT\catchme.cfexe
<Current directory>\ComboFixT\WhiteLegacy.cf
<Current directory>\ComboFixT\winlogondef.cf
<Current directory>\ComboFixT\executables.cf
<Current directory>\ComboFixT\L2M_combofix.cf
<Current directory>\ComboFixT\erunt.cf
<Current directory>\ComboFixT\Creg.cf
<Current directory>\ComboFixT\def_safeboot.cf
<Current directory>\ComboFixT\puritynames.cf
<Current directory>\ComboFixT\Qoo_combofix.cf
<Current directory>\ComboFixT\notifykeys.cf
<Current directory>\ComboFixT\ndis_combofix.cf
<Current directory>\ComboFixT\net_svc.cf

Deletes the following files:

C:\ComboFix\temp00.hiv
C:\ComboFix\runs.cf
C:\ComboFix\CF_anti-viking.bat
<Current directory>\Start.bat
C:\ComboFix\~

Moves the following files:

from <Current directory>\ComboFixT\Qoo.bat to C:\ComboFix\Qoo.bat
from <Current directory>\ComboFixT\puritynames.cf to C:\ComboFix\puritynames.cf
from <Current directory>\ComboFixT\Ntrights.cfexe to C:\ComboFix\Ntrights.cfexe
from <Current directory>\ComboFixT\Qoo2_combofix.cf to C:\ComboFix\Qoo2_combofix.cf
from <Current directory>\ComboFixT\region.cf to C:\ComboFix\region.cf
from <Current directory>\ComboFixT\regbindump.cfexe to C:\ComboFix\regbindump.cfexe
from <Current directory>\ComboFixT\Qoo_combofix.cf to C:\ComboFix\Qoo_combofix.cf
from <Current directory>\ComboFixT\nircmd.exe to C:\ComboFix\nircmd.exe
from <Current directory>\ComboFixT\net_svc.cf to C:\ComboFix\net_svc.cf
from <Current directory>\ComboFixT\ndis_combofix.cf to C:\ComboFix\ndis_combofix.cf
from <Current directory>\ComboFixT\notifykeys.cf to C:\ComboFix\notifykeys.cf
from <Current directory>\ComboFixT\NTPBack.exe to C:\ComboFix\NTPBack.exe
from <Current directory>\ComboFixT\ntp.exe to C:\ComboFix\ntp.exe
from <Current directory>\ComboFixT\NTP.bat to C:\ComboFix\NTP.bat
from <Current directory>\ComboFixT\vfind.cfexe to C:\ComboFix\vfind.cfexe
from <Current directory>\ComboFixT\Sys.bat to C:\ComboFix\Sys.bat
from <Current directory>\ComboFixT\swxcacls.cfexe to C:\ComboFix\swxcacls.cfexe
from <Current directory>\ComboFixT\v_combofix.cf to C:\ComboFix\v_combofix.cf
from <Current directory>\ComboFixT\winlogondef.cf to C:\ComboFix\winlogondef.cf
from <Current directory>\ComboFixT\WhiteLegacy.cf to C:\ComboFix\WhiteLegacy.cf
from <Current directory>\ComboFixT\whitedirB.cf to C:\ComboFix\whitedirB.cf
from <Current directory>\ComboFixT\setpath.cfexe to C:\ComboFix\setpath.cfexe
from <Current directory>\ComboFixT\sed.cfexe to C:\ComboFix\sed.cfexe
from <Current directory>\ComboFixT\RestartIt.cfexe to C:\ComboFix\RestartIt.cfexe
from <Current directory>\ComboFixT\SF.cfexe to C:\ComboFix\SF.cfexe
from <Current directory>\ComboFixT\swsc.cfexe to C:\ComboFix\swsc.cfexe
from <Current directory>\ComboFixT\swreg.exe to C:\ComboFix\swreg.exe
from <Current directory>\ComboFixT\svc_wht.cf to C:\ComboFix\svc_wht.cf
from <Current directory>\ComboFixT\mtee.cfexe to C:\ComboFix\mtee.cfexe
from <Current directory>\ComboFixT\def_safeboot.cf to C:\ComboFix\def_safeboot.cf
from <Current directory>\ComboFixT\dd.cfexe to C:\ComboFix\dd.cfexe
from <Current directory>\ComboFixT\Creg.cf to C:\ComboFix\Creg.cf
from <Current directory>\ComboFixT\dumphive.cfexe to C:\ComboFix\dumphive.cfexe
from <Current directory>\ComboFixT\ERDNTWIN.LOC to C:\ComboFix\ERDNTWIN.LOC
from <Current directory>\ComboFixT\ERDNTDOS.LOC to C:\ComboFix\ERDNTDOS.LOC
from <Current directory>\ComboFixT\ERDNT.e_e to C:\ComboFix\ERDNT.e_e
from <Current directory>\ComboFixT\catchme.cfexe to C:\ComboFix\catchme.cfexe
from <Current directory>\ComboFixT\Boot.bat to C:\ComboFix\Boot.bat
from <Current directory>\ComboFixT\bad_netsvc.cf to C:\ComboFix\bad_netsvc.cf
from <Current directory>\ComboFixT\CFCleanUp.bat to C:\ComboFix\CFCleanUp.bat
from <Current directory>\ComboFixT\ComboFix.bat to C:\ComboFix\ComboFix.bat
from <Current directory>\ComboFixT\Combobatch.bat to C:\ComboFix\Combobatch.bat
from <Current directory>\ComboFixT\CF_anti-viking.bat to C:\ComboFix\CF_anti-viking.bat
from <Current directory>\ComboFixT\L2M_combofix.cf to C:\ComboFix\L2M_combofix.cf
from <Current directory>\ComboFixT\history.bat to C:\ComboFix\history.bat
from <Current directory>\ComboFixT\handle.cfexe to C:\ComboFix\handle.cfexe
from <Current directory>\ComboFixT\List-C.bat to C:\ComboFix\List-C.bat
from <Current directory>\ComboFixT\MoveIt.bat to C:\ComboFix\MoveIt.bat
from <Current directory>\ComboFixT\moveex.cfexe to C:\ComboFix\moveex.cfexe
from <Current directory>\ComboFixT\Look2Me.bat to C:\ComboFix\Look2Me.bat
from <Current directory>\ComboFixT\ERUNT.LOC to C:\ComboFix\ERUNT.LOC
from <Current directory>\ComboFixT\ERUNT.cfexe to C:\ComboFix\ERUNT.cfexe
from <Current directory>\ComboFixT\erunt.cf to C:\ComboFix\erunt.cf
from <Current directory>\ComboFixT\executables.cf to C:\ComboFix\executables.cf
from <Current directory>\ComboFixT\FixLSP.bat to C:\ComboFix\FixLSP.bat
from <Current directory>\ComboFixT\findcombo.vbs to C:\ComboFix\findcombo.vbs
from <Current directory>\ComboFixT\FIND3M.bat to C:\ComboFix\FIND3M.bat

Miscellaneous:

Searches for the following windows:

ClassName: 'RegEdit_RegEdit' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''
ClassName: 'EDIT' WindowName: ''

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