Generic BackDoor!A3F8FBE42A40

This page shows details and results of our analysis on the malware Generic BackDoor!A3F8FBE42A40

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

128512

Description Added

2014-08-11

Description Modified

2014-08-11

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric BackDoor
Length128512 bytes
MD5a3f8fbe42a4082fd156cf2aff5484109
SHA19d25a116a54d23ad115bae4ea5ba9dee3882818c


Other Common Detection Aliases

Company NamesDetection Names
EMSI SoftwareTrojan.GenericKD.1793100 (B)
avastWin32:Malware-gen
AVG (GriSoft)MSIL4.AOHU (Trojan horse)
aviraTR/Dropper.Gen
KasperskyTrojan.Win32.Fsysna.akok
BitDefenderTrojan.GenericKD.1793100
FortiNetMSIL/CIK!tr
MicrosoftBackdoor:MSIL/Bladabindi
EsetMSIL/Injector.CIK
normanwinpe/Troj_Generic.VGCEL
pandaTrj/CI.A
risingTrojan.Win32.Generic.171A31CE!387592654

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 BetaGeneric BackDoor
McAfee SupportedGeneric 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:

9D25A116A54D23AD115BAE4EA5BA9DEE3882818C

The following files have been added to the system:

  • %APPDATA%\taskmgr.exe
  • %USERPROFILE%\Start Menu\Programs\Startup\32fb523449c7e3bdf53f4e5bf7367cca.exe

The following files have been changed:

  • %WINDIR%\SYSTEM32\wbem\logs\wbemprox.log

The following registry elements have been created:

  • HKEY_CURRENT_USER\SOFTWARE\32FB523449C7E3BDF53F4E5BF7367CCA\

The following registry elements have been changed:

  • HKEY_CURRENT_USER\DI = 33
  • HKEY_CURRENT_USER\ENVIRONMENT\SEE_MASK_NOZONECHECKS = 49
  • HKEY_CURRENT_USER\SOFTWARE\32FB523449C7E3BDF53F4E5BF7367CCA\[KL]
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\32FB523449C7E3BDF53F4E5BF7367CCA = "%APPDATA%\Taskmgr.exe" ..
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\RUN\32FB523449C7E3BDF53F4E5BF7367CCA = "%APPDATA%\Taskmgr.exe" ..

The applications attempted the following network connection(s):

  • 197.1.187.***:1177

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

Please use the following instructions for all supported versions of Windows:


1. Disable Windows System Restore. For instructions, please refer to: http://www.mcafee.com/us/downloads/free-tools/disabling-system-restore.aspx

2. Update your McAfee Anti-Virus product to the latest version (when possible), and ensure the latest DAT and Engine and any applicable EXTRA.DATs are installed.

3. Run a full system scan. (On-Demand Scan)

4. Reboot, as soon as it is convenient, to ensure all malicious components are removed.

Variants