Trojan.StartPage.48953

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Classes\comfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\cmdfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\exefile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\regedit\shell\open\command] '' = 'regedit.exe %1'
[<HKLM>\SOFTWARE\Classes\regfile\shell\open\command] '' = 'regedit.exe "%1"'
[<HKLM>\SOFTWARE\Classes\dunfile\shell\open\command] '' = ''
[<HKLM>\SOFTWARE\Classes\.exe] '' = 'exefile'
[<HKLM>\SOFTWARE\Classes\batfile\shell\open\command] '' = '"%1" %*'
[<HKLM>\SOFTWARE\Classes\telnet\shell\open\command] '' = 'rundll32.exe url.dll,TelnetProtocolHandler %l'

Creates the following services:

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

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

blocks the following features:

System Restore (SR)
System File Checker (SFC)

Creates and executes the following:

C:\ComboFix\grep.cfexe -Fixvf temp01
C:\ComboFix\sed.cfexe ":a; $!N; s/\n/\x3b/g; ta"
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\session manager\environment" /v path
C:\ComboFix\sed.cfexe "/.*\t/!d; s///; s/\x3b/\n/g "
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\session manager\environment" /v comspec
C:\ComboFix\grep.cfexe -q "Windows 2000"
C:\ComboFix\swreg.cfexe query "hklm\software\microsoft\windows nt\currentversion" /v currentversion
C:\ComboFix\grep.cfexe -iq "REG_EXPAND_SZ %systemroot%\\system32\\cmd.exe$"
C:\ComboFix\grep.cfexe -q "Windows XP"
C:\ComboFix\nircmd.cfexe killprocess verclsid.dat
C:\ComboFix\nircmd.cfexe killprocess flashy.exe
C:\ComboFix\nircmd.cfexe killprocess rundl132.exe
C:\ComboFix\nircmd.cfexe killprocess OSO.EXE
C:\ComboFix\nircmd.cfexe killprocess VFind.cfexe
C:\ComboFix\nircmd.cfexe killprocess ntvdm.exe
C:\ComboFix\swreg.cfexe add "hklm\software\microsoft\windows\currentversion\app paths\combofix.exe" /ve /d "<Full path to virus>"
C:\ComboFix\nircmd.cfexe killprocess grep.cfexe
C:\ComboFix\nircmd.cfexe killprocess sed.cfexe
C:\ComboFix\grep.cfexe -q "currentversion.* 6.0"
C:\ComboFix\nircmd.cfexe sysrefresh intl
C:\ComboFix\nircmd.cfexe service start winmgmt
C:\ComboFix\swreg.cfexe copy "hku\.default\control panel\international" "hku\.default\control panel\international_combofixbackup" /s
<SYSTEM32>\swreg.exe import region.dat
C:\ComboFix\vfind.cfexe -lrtf "datetest_"
C:\ComboFix\vfind.cfexe -rtf -d+2012-10-13 C:\ComboFix\ComboFix.bat
C:\ComboFix\nircmd.cfexe Infobox "Current date is 2012-10-23.~n~nThis copy of ComboFix has expired.~nPlease download an updated copy" "Expired - 07-12-07.3"
C:\ComboFix\sed.cfexe -r -e "/datetest_/I!d; s/.{26}//;s/ .*//"
C:\ComboFix\grep.cfexe -sq [0-9]
C:\ComboFix\sed.cfexe "/:\\/!d; s/.*\t//"
C:\ComboFix\swreg.cfexe delete "hkcu\software\microsoft\windows\currentversion\policies\system" /v "disableregistrytools"
C:\ComboFix\swreg.cfexe query hklm\system\currentcontrolset\enum\root\system
C:\ComboFix\swreg.cfexe query hkcr\clsid\{9f143c3a-1457-6cca-03a7-7aa23b61e40f}\inprocserver32 /ve
C:\ComboFix\regt.cfexe /s creg.dat
C:\ComboFix\swreg.cfexe query "hkcu\control panel\international_combofixbackup"
C:\ComboFix\swreg.cfexe copy "hkcu\control panel\international" "hkcu\control panel\international_combofixbackup" /s
C:\ComboFix\nircmd.cfexe service manual wmi
C:\ComboFix\swreg.cfexe query hklm\software\swearware /v combofix_wow
C:\ComboFix\nircmd.cfexe killprocess logo1_.exe
C:\ComboFix\sed.cfexe -r "/.* {14}/!d;s///"
C:\ComboFix\nircmd.exe killprocess nircmd.cfexe
C:\ComboFix\nircmd.cfexe cmdwait 2000 killprocess sed.cfexe
C:\ComboFix\ListDlls.cfexe cmd.exe
C:\ComboFix\grep.cfexe -Fsq \ Foreign.dat
C:\ComboFix\nircmd.cfexe abortshutdown
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\nls\codepage" /v acp
C:\ComboFix\grep.cfexe -Fiq "/killall"
C:\ComboFix\grep.cfexe -Fiq /u
C:\ComboFix\nircmd.exe regdelval "hkcu\software\microsoft\command processor" "autorun"
C:\ComboFix\swxcacls.cfexe "<SYSTEM32>\cmd.exe" /p /ga:f /gs:f /gp:x /gu:x /q
C:\ComboFix\nircmd.exe exec hide swxcacls.cfexe "<SYSTEM32>\cmd.exe" /p /ga:f /gs:f /gp:x /gu:x /q
C:\ComboFix\nircmd.exe regdelval "hkcu\software\policies\microsoft\windows\system" "disablecmd"
C:\ComboFix\nircmd.exe regdelval "hklm\software\microsoft\command processor" "autorun"
C:\ComboFix\grep.cfexe -Fsqx "Microsoft Windows XP [Version 5.1.2600]"
C:\ComboFix\nircmd.cfexe cmdwait 2000 killprocess listdlls.cfexe
C:\ComboFix\nircmd.exe win close ititle "ComboFix"
C:\ComboFix\nircmd.exe win close ititle "pause"
C:\ComboFix\sed.cfexe "/.*\t/!d; s///"
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\nls\codepage" /v oemcp
C:\ComboFix\grep.cfexe -Evxq "437|708|720|737|775|85[0257]|86[01234569]|874|93[26]|949|950|1258"
C:\ComboFix\grep.cfexe -q "10$"
C:\ComboFix\grep.cfexe -q "0A$"
C:\ComboFix\nircmd.cfexe killprocess thguard.exe
C:\ComboFix\nircmd.cfexe killprocess fubcwj.exe
C:\ComboFix\nircmd.cfexe killprocess severe.exe
C:\ComboFix\nircmd.cfexe killprocess bryato.exe
C:\ComboFix\nircmd.cfexe killprocess conime.exe
C:\ComboFix\mtee.cfexe NlsLang
C:\ComboFix\grep.cfexe -q "0C$"
C:\ComboFix\swreg.cfexe add "hkcu\console\%systemroot%_system32_cmd.exe" /v CodePage /t reg_dword /d "1251"
C:\ComboFix\swreg.cfexe query "hklm\system\currentcontrolset\control\nls\language" /v installlanguage
C:\ComboFix\grep.cfexe -q "13$"
C:\ComboFix\grep.cfexe -q "16$"
C:\ComboFix\grep.cfexe -q "04$"
C:\ComboFix\grep.cfexe -q "07$"
C:\ComboFix\grep.cfexe -q "0B$"

Executes the following:

<SYSTEM32>\findstr.exe -MIF:/ update_load
<SYSTEM32>\chcp.com 1251

Injects code into

the following system processes:

<SYSTEM32>\cmd.exe

Modifies settings of Windows Internet Explorer:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnonBadCertRecving' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPost' = ''
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPostRedirect' = '00000001'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPostRedirect' = '00000000'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnZoneCrossing' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnonBadCertRecving' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPost' = ''
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPostRedirect' = '00000001'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnPostRedirect' = '00000000'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings] 'WarnOnZoneCrossing' = '00000001'

Forces autoplay for removable media.

Sets a new unauthorized home page for Windows Internet Explorer.

Modifies file system :

Creates the following files:

C:\ComboFix\safeboot.dat
C:\ComboFix\safeboot.def.dat
C:\ComboFix\rogues.dat
C:\ComboFix\Purity.dat
C:\ComboFix\region.dat
C:\ComboFix\safeboot.def.vista.dat
C:\ComboFix\system_ini.dat
C:\ComboFix\whitedirB.dat
C:\ComboFix\svchost.vista.dat
C:\ComboFix\svc_wht.dat
C:\ComboFix\svchost.dat
C:\ComboFix\Policies.dat
C:\ComboFix\LocalServiceNetworkRestricted.dat
C:\ComboFix\LocalSystemNetworkRestricted.dat
C:\ComboFix\LocalService.dat
C:\ComboFix\Creg.dat
C:\ComboFix\executables.dat
C:\ComboFix\ndis_combofix.dat
C:\ComboFix\netsvc.xp.dat
C:\ComboFix\NetworkService.dat
C:\ComboFix\netsvc.vista.dat
C:\ComboFix\netsvc.bad.dat
C:\ComboFix\netsvc.dat
C:\ComboFix\temp01
<SYSTEM32>\swxcacls.exe
C:\ComboFix\NlsLang
C:\ComboFix\erunt.dat
C:\ComboFix\errdbg.dat
<SYSTEM32>\swsc.exe
%WINDIR%\NirCmd.exe
C:\ComboFix\regt.cfexe
%WINDIR%\catchme.exe
<SYSTEM32>\VFind.exe
<SYSTEM32>\swreg.exe
C:\ComboFix\SvcDrv.vbs
C:\ComboFix\ERDNTDOS.LOC
C:\ComboFix\ERDNTWIN.LOC
C:\ComboFix\ERDNT.e_e
C:\ComboFix\WhiteLegacy.dat
C:\ComboFix\zhsvc.dat
C:\ComboFix\ERUNT.LOC
C:\ComboFix\OSid.vbs
C:\ComboFix\restore_pt.vbs
C:\ComboFix\LocalDrive.vbs
C:\ComboFix\FProps.vbs
C:\ComboFix\lnkread.vbs
C:\ComboFix\clsid.dat
C:\ComboFix\pid.bat
C:\ComboFix\Qoo.bat
C:\ComboFix\NTP.bat
C:\ComboFix\MoveIt.bat
C:\ComboFix\ND_.bat
C:\ComboFix\SetEnvmt.bat
C:\ComboFix\ntp.exe
C:\ComboFix\NTPBack.exe
C:\ComboFix\nircmd.exe
C:\ComboFix\Sys.bat
C:\ComboFix\upload.bat
C:\ComboFix\List-C.bat
C:\ComboFix\ComboFix.bat
C:\ComboFix\Comspec.bat
C:\ComboFix\Combobatch.bat
C:\ComboFix\Boot.bat
C:\ComboFix\CF_anti-viking.bat
C:\ComboFix\DelClsid.bat
C:\ComboFix\history.bat
C:\ComboFix\Lang.bat
C:\ComboFix\FIXLSP.bat
C:\ComboFix\Disclaimer.bat
C:\ComboFix\FIND3M.bat
C:\ComboFix\SF.cfexe
C:\ComboFix\swreg.cfexe
C:\ComboFix\setpath.cfexe
C:\ComboFix\RestartIt.cfexe
C:\ComboFix\sed.cfexe
C:\ComboFix\swsc.cfexe
C:\ComboFix\023.dat
C:\ComboFix\023v.dat
C:\ComboFix\zip.cfexe
C:\ComboFix\swxcacls.cfexe
C:\ComboFix\vfind.cfexe
C:\ComboFix\nircmd.cfexe
C:\ComboFix\dumphive.cfexe
C:\ComboFix\ERUNT.cfexe
C:\ComboFix\dd.cfexe
C:\ComboFix\ComboFix.sys
C:\ComboFix\catchme.cfexe
C:\ComboFix\grep.cfexe
C:\ComboFix\moveex.cfexe
C:\ComboFix\mtee.cfexe
C:\ComboFix\ListDlls.cfexe
C:\ComboFix\gsar.cfexe
C:\ComboFix\handle.cfexe

Deletes the following files:

C:\ComboFix\netsvc.vista.dat
C:\ComboFix\svchost.vista.dat
C:\ComboFix\CF_anti-viking.bat
C:\ComboFix\Comspec.bat
C:\ComboFix\nircmd.exe
C:\ComboFix\NlsLang
C:\ComboFix\temp01

Moves the following files:

from C:\ComboFix\netsvc.xp.dat to C:\ComboFix\netsvc.dat

Miscellaneous:

Searches for the following windows:

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

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