RDN/Generic BackDoor!3BA9D6F79361

This page shows details and results of our analysis on the malware RDN/Generic BackDoor!3BA9D6F79361

Overview

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.


Minimum DAT

7075 (2013-05-14)

Updated DAT

7075 (2013-05-14)

Minimum Engine

5400.1158

File Length

1449274

Description Added

2013-05-15

Description Modified

2013-05-15

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionRDN/Generic BackDoor
Length1449274 bytes
MD53ba9d6f7936187f1a9d9f9bbe9bbf28d
SHA1702f9cc8766d03fb5f609917846ec9b32eae77f0


Other Common Detection Aliases

Company NamesDetection Names
AVG (GriSoft)Generic8_c.NQQ (Trojan horse)
aviraTR/Dropper.Gen
BitDefenderTrojan.Generic.9066882
Dr.WebBackDoor.Comet.152
FortiNetw32/generic
Microsoftbackdoor:win32/fynloski.a
EsetWin32/Packed.Autoit.H (application)
Trend MicroTROJ_GEN.R72H1ED
vba32Trojan.Autoit.F
Vet (Computer Associates)Win32/Fynloski.bBcKKNB

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


ActivitiesRisk Levels
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
Enumerates many system files and directories.Low
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
Attempts to write to a memory location of an unknown processLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaRDN/Generic BackDoor
McAfee SupportedRDN/Generic BackDoor



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:

702F9CC8766D03FB5F609917846EC9B32EAE77F0

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\MSDCSC\msdcsc.exe

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

  • %TEMP%\dsqcdem
  • %TEMP%\autE.tmp
  • %TEMP%\aut1B.tmp
  • %TEMP%\idkgvif

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\DC3_FEXEC\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\MICROUPDATE = %WINDIR%\SYSTEM32\MSDCSC\msdcsc.exe
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\WINLOGON\USERINIT = %WINDIR%\SYSTEM32\userinit.exe,%WINDIR%\SYSTEM32\MSDCSC\msdcsc.exe

The applications attempted the following network connection(s):

  • 109.30.179.***:82

Symptoms

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

Method 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.

Removal

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.

Variants