Virus Profile: BackDoor-EZG.c!B1ECB64F9A11

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 11/17/2012
Date Added: 11/17/2012
Origin: Unknown
Length: 3990528
Type: Trojan
Subtype: Remote Access
DAT Required: 6899
Removal Instructions
   
 
 
   

Description

This is a Trojan detection. Unlike viruses, Trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include e-mail, malicious or hacked Web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Indication of Infection

This symptoms of this detection are the files, registry, and network communication referenced in the characteristics section.

Methods of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

   

Virus Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionBackDoor-EZG.c
Length3990528 bytes
MD5b1ecb64f9a11cdc1018ed20d0bf3d129
SHA1233cf0e08a2e3cac9c2b669d64be4b4559e5b334


Other Common Detection Aliases

Company NamesDetection Names
ahnlabTrojan/Win32.Injector
avastWin32:Flooder-GR
AVG (GriSoft)Delf.XEA
aviraTR/Agent.GH.18
KasperskyBackdoor.Win32.Agent.bjev
BitDefenderTrojan.Generic.KDV.203906
clamavPUA.Win32.Packer.Vip
Dr.WebBackDoor.Comet.21
FortiNetW32/Agent.A!tr.bdr
Microsoftbackdoor:win32/fynloski.a
SymantecBackdoor.Krademok
EsetWin32/Delf.OAZ trojan
normanw32/delf.fhqc
pandaGeneric Malware
risingBackdoor.Win32.BlackHole.ye
SophosMal/DelfInj-A
Trend MicroBKDR_FYNLOS.SMIA
vba32Backdoor.MSIL.Agent.epn
V-BusterBackdoor.Fynloski.Gen.1 (trojan)
Vet (Computer Associates)Win32/Delf.ALK

Other brands and names may be claimed as the property of others.


ActivitiesRisk Levels
Attempts to write to a memory location of a protected process.High
Attempts to write to a memory location of a Windows system processHigh
Disables the Windows Task Manager.High
Attempts to write to a memory location of a previously loaded process.Medium
Adds or modifies winlogon userinit registry value. Could be used to launch a program on startup.Medium
Modifies winlogon configuration settings in registryMedium
Attempts to launch an instance of the Windows file system explorer.Low
Enumerates many system files and directories.Low
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaBackDoor-EZG.c
McAfee SupportedBackDoor-EZG.c



System Changes

Some path values have been replaced with environment variables as the exact location may vary with different configurations.
e.g.
%WINDIR% = \WINDOWS (Windows 9x/ME/XP/Vista/7), \WINNT (Windows NT/2000)
%PROGRAMFILES% = \Program Files


The following files were analyzed:

233cf0e08a2e3cac9c2b669d64be4b4559e5b334

The following files have been added to the system:

  • %TEMP%\SWEDISH HOUSE MAFIA - 'ONE' (INSTRUMENTAL VERSION) OFFICIAL VIDEO (HD).MP3
  • C:\Windupdt\winupdate.exe

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\DC3_FEXEC\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\EQUALIZERSETTINGS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MULTIMEDIA\ACTIVEMOVIE\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MULTIMEDIA\ACTIVEMOVIE\FILTER CACHE\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\REALMS\
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\SOFTWARE\MICROSOFT\MEDIAPLAYER\SETUP\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\PLAYLISTHEIGHT = 100
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\PLAYLISTWIDTH = 194
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\SETTINGSHEIGHT = 100
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\SETTINGSWIDTH = 100
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\SHOWHORIZONTALSEPARATOR = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PLAYER\TASKS\NOWPLAYING\SHOWVERTICALSEPARATOR = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\UPGRADECHECKFREQUENCY = 2
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYEXCLUDE
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYNAME
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYPORT = 80
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\HTTP\PROXYSTYLE = 1
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYEXCLUDE
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYNAME
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYPORT = 1755
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MEDIAPLAYER\PREFERENCES\PROXYSETTINGS\MMS\PROXYSTYLE = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\MULTIMEDIA\ACTIVEMOVIE\FILTER CACHE\0 = [binary data]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\COMPUTERNAME = %COMPUTERNAME%
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\UNIQUEID = {8765558B-E47C-4263-9E62-C83083E3FEB4}
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS MEDIA\WMSDK\GENERAL\VOLUMESERIALNUMBER = 1952645495
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\WINUPDATER = C:\Windupdt\winupdate.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\CLASSES\SOFTWARE\MICROSOFT\MEDIAPLAYER\SETUP\UPDATETIMESTAMP = 1343112080
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\AUDIOCOMPRESSIONMANAGER\DRIVERCACHE\MSACM.L3ACM\AFORMATTAGCACHE = [binary data]
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\AUDIOCOMPRESSIONMANAGER\DRIVERCACHE\MSACM.L3ACM\CFILTERTAGS = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\AUDIOCOMPRESSIONMANAGER\DRIVERCACHE\MSACM.L3ACM\CFORMATTAGS = 2
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\AUDIOCOMPRESSIONMANAGER\DRIVERCACHE\MSACM.L3ACM\FDWSUPPORT = 1
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\WINLOGON\USERINIT = %WINDIR%\SYSTEM32\userinit.exe,C:\Windupdt\winupdate.exe

   

All Users:

Please use the following instructions for all supported versions of Windows to remove threats and other potential risks:

1.Disable System Restore .

2.Update to current engine and DAT files for detection and removal.

3.Run a complete system scan.

Modifications made to the system Registry and/or INI files for the purposes of hooking system startup, will be successfully removed if cleaning with the recommended engine and DAT combination (or higher).

1. Please go to the Microsoft Recovery Console and restore a clean MBR.

On windows XP:

Insert the Windows XP CD into the CD-ROM drive and restart the computer.
When the "Welcome to Setup" screen appears, press R to start the Recovery Console.
Select the Windows installation that is compromised and provide the administrator password
Issue 'fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.


On Windows Vista and 7:

Insert the Windows CD into the CD-ROM drive and restart the computer.
Click on "Repair Your Computer"
When the System Recovery Options dialog comes up, choose the Command Prompt.
Issue 'bootrec /fixmbr' command to restore the Master Boot Record
Follow onscreen instructions
Reset and remove the CD from CD-ROM drive.

   

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