Downloader.gen.a!8229​B9C5DAB0

This page shows details and results of our analysis on the malware Downloader.gen.a!8229B9C5DAB0

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

7307 (2014-01-03)

Updated DAT

7307 (2014-01-03)

Minimum Engine

5600.1067

File Length

489984

Description Added

2014-01-05

Description Modified

2014-01-05

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionDownloader.gen.a
Length489984 bytes
MD58229b9c5dab08a3a233a1860f57759d6
SHA1fd8891d816299edaaecbca83155f22a9b1b30c0b


Other Common Detection Aliases

Company NamesDetection Names
AVG (GriSoft)Win32/DH{ADVBEx55JVdOZAE2}
aviraTR/Crypt.EPACK.Gen2
KasperskyVirus.Win32.Nimnul.f
BitDefenderWin32.VJadtre.3
clamavPUA.Win32.Packer.Asprotect-2
Dr.WebBackDoor.Darkshell.246
F-ProtW32/PatchLoad.e
Microsofttrojandownloader:win32/small.gen!z
EsetNewHeur_PE
normanSB/NetworkWorm
risingWin32.Roue.a
SophosMal/EncPk-ACE
vba32Trojan.Genome.al
V-BusterSuspicious!SA (sequence)

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


ActivitiesRisk Levels
Enumerates process listLow
Process attempts to call itself recursivelyLow
No digital signature is presentInformational


McAfee ScansScan Detections
McAfee BetaDownloader.gen.a
McAfee SupportedDownloader.gen.a



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:

FD8891D816299EDAAECBCA83155F22A9B1B30C0B

The following files have been added to the system:

  • %WINDIR%\SYSTEM32\c_31892.nls

The following files have been changed:

  • c:\Users exe File.exe
  • %PROGRAMFILES%\msn\msncorefiles\msn6.exe
  • %PROGRAMFILES%\Adobe\Reader 9.0\Reader\LogTransport2.exe
  • %PROGRAMFILES%\msn\msncorefiles\copymar.exe
  • %PROGRAMFILES%\msn\msncorefiles\update.exe
  • c:\Users exe File.exe
  • %PROGRAMFILES%\msn\msncorefiles\setup\msnunin.exe
  • c:\Users exe File.exe

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

  • %TEMP%\HaUz.exe
  • %TEMP%\42a144ab.bat
  • %TEMP%\5abf4a71.exe

The following registry elements have been created:

  • HKEY_LOCAL_MACHINE\SOFTWARE\GTPLUS\

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\GTPLUS\TIME = [binary data]

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