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Virus Profile: Downloader-BLE!4940B0B59B52

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 9/20/2012
Date Added: 9/20/2012
Origin: Unknown
Length: 36021
Type: Trojan
Subtype: Downloader
DAT Required: 6841
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 DetectionDownloader-BLE
Length36021 bytes
MD54940b0b59b5255fc5755881e3cf68fef
SHA1edf5cd391e33d2c21c69df5cdd1e03faec2651b5


Other Common Detection Aliases

Company NamesDetection Names
ahnlabDropper/Agent.36021
avastWin32:Rootkit-gen
AVG (GriSoft)Agent.AUHK.dropper
aviraRkit/Agent.gkj
KasperskyTrojan-Dropper.Win32.Agent.aeuf
BitDefenderTrojan.Generic.4864533
clamavPUA.Packed.FSG
Dr.WebTrojan.MulDrop.30514
eSafe (Alladin)Trojan/Worm
F-ProtW32/Heuristic-210!Eldorado
FortiNetW32/Runner.BV!tr
Microsofttrojandownloader:win32/small.gen!ao
SymantecTrojan.Dropper
EsetWin32/TrojanDownloader.Agent.OQW trojan
normanSuspicious_F.E.gen
pandaTrj/Downloader.VHK
SophosMal/Generic-L
Trend MicroTROJ_DLOADR.ERC
vba32Win32.TrojanDownloader.Agent.OQG
V-BusterSuspicious!SA (sequence)
Vet (Computer Associates)Win32/SillyDl!generic

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


ActivitiesRisk Levels
Modifies Windows explorer file browser's Advanced settings. Sometimes used by malware to make executable files look like documents.Medium
Enumerates many system files and directories.Low
Adds or modifies Internet Explorer cookiesLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaDownloader-BLE
McAfee SupportedDownloader-BLE



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:

4940b0b59b5255fc5755881e3cf68fef

The following files have been added to the system:

  • %TEMP%\37800.dll
  • %WINDIR%\tasks\1

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

  • %TEMP%\98989898

The following registry elements have been changed:

  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\HIDDEN = 2
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SHOWSUPERHIDDEN = 0
  • HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER\ADVANCED\SUPERHIDDEN = 1
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet\CONTROL\SESSION MANAGER\PENDINGFILERENAMEOPERATIONS = \??\%TEMP%\4940b0b59b5255fc5755881e3cf68fef

   

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.