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Virus Profile: Generic BackDoor.yo!48D94848688C

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 11/5/2012
Date Added: 11/5/2012
Origin: Unknown
Length: 212992
Type: Trojan
Subtype: -
DAT Required: 6886
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 DetectionGeneric BackDoor.yo
Length212992 bytes
MD548d94848688c3b2510f4567c283e88a5
SHA15ae299f34a9b683b5c40554cd6d257a829ec341a


Other Common Detection Aliases

Company NamesDetection Names
ahnlabTrojan/Win32.Npkon
avastWin32:Dropper-GHV
AVG (GriSoft)Agent3.DQL
aviraTR/Spy.Agent.586689
Dr.WebTrojan.Proxy.19251
FortiNetW32/Agent.TNE!tr
MicrosoftWorm:Win32/Ganelp.B
SymantecW32.Griptolo
normanW32/Ganelp.A
pandaGeneric Worm
SophosW32/Autorun-BRF
Trend MicroWORM_GANELP.SMIA
vba32Trojan.Agent.mzjz

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


ActivitiesRisk Levels
Modifies Windows firewall settings.Medium
Attempts to add an event to the Windows task scheduler. This could be used to launch programs at pre-defined intervals.Low
Enumerates many system files and directories.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaGeneric BackDoor.yo
McAfee SupportedGeneric BackDoor.yo



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:

5ae299f34a9b683b5c40554cd6d257a829ec341a

The following files have been added to the system:

  • %PROGRAMFILES%\746301ae\jusched.exe
  • %WINDIR%\Tasks\Update23.job

The following files were temporarily written to disk then later removed:

  • %PROGRAMFILES%\746301ae\746301ae

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\SERVICES\SHAREDACCESS\PARAMETERS\FIREWALLPOLICY\STANDARDPROFILE\AUTHORIZEDAPPLICATIONS\LIST\%PROGRAMFILES%\746301AE\JUSCHED.EXE = %PROGRAMFILES%\746301ae\jusched.exe:*:Enabled:JavaUpdate23

The applications attempted the following network connection(s):

  • 209.202.252.**:21
  • 213.202.225.**:21
  • 213.202.225.**:21 (irc) : USER dictio_802884

   

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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