RDN/Generic BackDoor!sf!488A84B64​229

This page shows details and results of our analysis on the malware RDN/Generic BackDoor!sf!488A84B64229

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 Engine

5600.1067

File Length

222720

Description Added

2013-07-25

Description Modified

2013-07-25

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionRDN/Generic BackDoor!sf
Length222720 bytes
MD5488a84b642295435c6b30d31a86e4a71
SHA1a7eef9b5e930a7d6c3939bdd51022d160dc89289


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareTrojan.GenericKDV.1072187 (B)
avastWin32:Malware-gen
AVG (GriSoft)Generic33.CHWN (Trojan horse)
aviraTR/MSIL.Disfa.ascg
KasperskyTrojan.MSIL.Disfa.ascg
BitDefenderTrojan.GenericKDV.1072187
Dr.WebWin32.HLLW.Autoruner.25074
FortiNetW32/Disfa.ASCG!tr
MicrosoftBackdoor:MSIL/Bladabindi.F
Trend MicroTROJ_SPNR.07G613
vba32TScope.Trojan.MSIL
V-BusterTrojan.Disfa!KEZSmM5HR78 (trojan)

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


ActivitiesRisk Levels
Enumerates many system files and directories.Low
Process attempts to call itself recursivelyLow
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


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



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:

A7EEF9B5E930A7D6C3939BDD5[private subnet]DC89289

The following files have been added to the system:

  • %TEMP%\LSASS.EXE
  • %USERPROFILE%\Start Menu\Programs\Startup\ef6805c25b5a2f877bc96e021971597e.exe
  • C:\.tmp

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\EF6805C25B5A2F877BC96E021971597E\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\ENVIRONMENT\SEE_MASK_NOZONECHECKS = 49
  • HKEY_CURRENT_USER\SOFTWARE\EF6805C25B5A2F877BC96E021971597E\US = 64
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\EF6805C25B5A2F877BC96E021971597E = "%TEMP%\lsass.exe" ..
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\EF6805C25B5A2F877BC96E021971597E = "%TEMP%\lsass.exe" ..

The applications attempted the following network connection(s):

  • 1[private subnet]:50003

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