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Dr.Web vxCube

打开分析仪

计算机病毒事件调查

病毒知识库

技术

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教育培训

误区

有关反病毒软件的误区

Trojan.DownLoader4.62211

Added to the Dr.Web virus database: 2011-09-26

Virus description added: 2011-09-27

Technical Information

To ensure autorun and distribution:

Creates the following services:

[<HKLM>\SYSTEM\ControlSet001\Services\4N9TI8JB2804] 'Start' = '00000002'
[<HKLM>\SYSTEM\ControlSet001\Services\PMGTL] 'Start' = '00000002'

Malicious functions:

Creates and executes the following:

C:\2.exe MNQEVQUKIHRUEC
<Current directory>\BEILERW1I.exe

Executes the following:

<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v Play_Animations /t REG_SZ /d no /F
<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Display Inline Images" /t REG_SZ /d yes /F
<SYSTEM32>\regsvr32.exe /u /s itss.dll
<SYSTEM32>\reg.exe delete HKLM\Software\Microsoft\Windows\CurrentVersion\Run /F
<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v DisableScriptDebuggerIE /t REG_SZ /d yes /F
<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Disable Script Debugger" /t REG_SZ /d yes /F
<SYSTEM32>\regsvr32.exe /s jscript.dll
<SYSTEM32>\regsvr32.exe /u /s msvidctl.dll
<SYSTEM32>\regsvr32.exe /u /s vbscript.dll
<SYSTEM32>\cmd.exe /c c:\2.bat
<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v Play_Background_Sounds /t REG_SZ /d no /F
<SYSTEM32>\reg.exe ADD "HKCU\Software\Microsoft\Internet Explorer\Main" /v "Display Inline Videos" /t REG_SZ /d no /F
<SYSTEM32>\regsvr32.exe /u /s scrrun.dll

Modifies file system :

Creates the following files:

%WINDIR%\MNQEVQUKIHRUEC.txt
C:\2.bat
%PROGRAM_FILES%\JUUG3M8I9\098CMD8PON.exe
%PROGRAM_FILES%\JUUG3M8I9\M4TO69.exe
C:\2.exe
<Current directory>\BEILERW1I.exe
<Current directory>\CF9UAQ.exe
%PROGRAM_FILES%\RX3PGGLTUX\K87D6IA0AGB.exe
%PROGRAM_FILES%\RX3PGGLTUX\1WBMWDS.exe

Sets the 'hidden' attribute to the following files:

%PROGRAM_FILES%\JUUG3M8I9\M4TO69.exe
%PROGRAM_FILES%\JUUG3M8I9\098CMD8PON.exe
<Current directory>\BEILERW1I.exe
%PROGRAM_FILES%\RX3PGGLTUX\1WBMWDS.exe
%PROGRAM_FILES%\RX3PGGLTUX\K87D6IA0AGB.exe

Deletes the following files:

%WINDIR%\Media\Windows XP Logon Sound.wav
%WINDIR%\Media\Windows XP Logoff Sound.wav
%WINDIR%\Media\Windows XP Minimize.wav
%WINDIR%\Media\Windows XP Menu Command.wav
%WINDIR%\Media\Windows XP Information Bar.wav
%WINDIR%\Media\Windows XP Hardware Fail.wav
%WINDIR%\Media\Windows XP Exclamation.wav
%WINDIR%\Media\Windows XP Hardware Remove.wav
%WINDIR%\Media\Windows XP Hardware Insert.wav
%WINDIR%\Media\Windows XP Notify.wav
%WINDIR%\Media\Windows XP Shutdown.wav
%WINDIR%\Media\Windows XP Ringout.wav
%WINDIR%\Media\Windows XP Startup.wav
%WINDIR%\Media\Windows XP Start.wav
%WINDIR%\Media\Windows XP Ringin.wav
%WINDIR%\Media\Windows XP Print complete.wav
%WINDIR%\Media\Windows XP Pop-up Blocked.wav
%WINDIR%\Media\Windows XP Restore.wav
%WINDIR%\Media\Windows XP Recycle.wav
%WINDIR%\Media\Windows XP Error.wav
%WINDIR%\Media\onestop.mid
%WINDIR%\Media\notify.wav
%WINDIR%\Media\ringin.wav
%WINDIR%\Media\recycle.wav
%WINDIR%\Media\flourish.mid
%WINDIR%\Media\chimes.wav
<Current directory>\CF9UAQ.exe
%WINDIR%\Media\ding.wav
%WINDIR%\Media\chord.wav
%WINDIR%\Media\ringout.wav
%WINDIR%\Media\Windows XP Critical Stop.wav
%WINDIR%\Media\Windows XP Battery Low.wav
%WINDIR%\Media\Windows XP Ding.wav
%WINDIR%\Media\Windows XP Default.wav
%WINDIR%\Media\Windows XP Battery Critical.wav
%WINDIR%\Media\tada.wav
%WINDIR%\Media\start.wav
%WINDIR%\Media\Windows XP Balloon.wav
%WINDIR%\Media\town.mid

Network activity:

Connects to:

'66.##.187.31':443
'22#.73.10.1':443

Miscellaneous:

Searches for the following windows:

ClassName: 'MNQEVQUKIHRUEC' WindowName: 'uybbcteimf'
ClassName: 'MNQEVQUKIHRUEC' WindowName: ''
ClassName: 'Shell_TrayWnd' WindowName: ''

Curing recommendations

If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.

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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

Download Dr.Web

Download by serial number

Download on App Store

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

Download Dr.Web

Download by serial number

If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
- Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
- Once you have activated safe mode, install the Dr.Web for Android onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
- Switch off your device and turn it on as normal.

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