Generic Downloader.x!25F19F96​0D02

This page shows details and results of our analysis on the malware Generic Downloader.x!25F19F960D02

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

683008

Description Added

2014-03-31

Description Modified

2014-03-31

Malware Proliferation

Characteristics

This is a Trojan

File PropertiesProperty Values
McAfee DetectionGeneric Downloader.x
Length683008 bytes
MD525f19f960d02005db22c79b5136cae94
SHA180684737f77ac4de67eccfab3fce8b4d2c2310d4


Other Common Detection Aliases

Company NamesDetection Names
aviraADWARE/InstallCore.Gen7
Dr.WebTrojan.Packed.24524
Eseta variant of Win32/InstallCore.JE.gen
normanKryptik.CDMO
risingPE:Malware.XPACK-LNR/Heur!1.5594
SophosInstallCore ToDownload
vba32Downware.InstallCore

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


ActivitiesRisk Levels
Attempts to download an executable file from the web.Medium
Enumerates many system files and directories.Low
Enumerates process listLow
Attempts to send data or commands via HTTPLow
Adds or modifies Internet Explorer cookiesLow


McAfee ScansScan Detections
McAfee BetaGeneric Downloader.x
McAfee SupportedGeneric Downloader.x



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:

80684737F77AC4DE67ECCFAB3FCE8B4D2C2310D4

The following files have been added to the system:

  • %TEMP%\ish213421\css\main.css
  • %TEMP%\ish213421\form.bmp.Mask
  • %TEMP%\ish213421\images\Color_Button_Hover.png
  • %TEMP%\ish213421\images\Progress.png
  • %TEMP%\is266766283\218849_stp.EXE.part
  • %TEMP%\ish213421\css\sdk-ui\images\progress-bg.png
  • %TEMP%\ish213421\images\loader.gif
  • %TEMP%\ish213421\css\sdk-ui\images\button-bg.png
  • %TEMP%\ish213421\images\sponsored.png
  • %TEMP%\ish213421\css\sdk-ui\images\progress-bg-corner.png
  • %TEMP%\ish213421\images\Color_Button.png
  • %TEMP%\ish213421\images\truste_logo.png
  • %TEMP%\ish213421\locale\ES.locale
  • %TEMP%\ish213421\csshover3.htc
  • %TEMP%\ish213421\css\sdk-ui\button.css
  • %TEMP%\ish213421\css\sdk-ui\progress-bar.css
  • %TEMP%\ish213421\locale\EN.locale
  • %TEMP%\ish213421\images\Resume_Button.png
  • %TEMP%\ish213421\images\Grey_Button_Hover.png
  • %TEMP%\ish213421\images\ProgressBar.png
  • %TEMP%\ish213421\images\BG.png
  • %TEMP%\ish213421\images\Quick_Specs.png
  • %TEMP%\ish213421\images\icon_generic.png
  • %TEMP%\ish213421\css\ie6_main.css
  • %TEMP%\is266766283\218849_stp.EXE
  • %TEMP%\ish213421\css\sdk-ui\images\progress-bg2.png
  • %TEMP%\ish213421\css\sdk-ui\browse.css
  • %TEMP%\ish213421\css\sdk-ui\checkbox.css
  • %TEMP%\ish213421\images\Pause_Button.png
  • %TEMP%\ish213421\images\clickVerify.png
  • %TEMP%\ish213421\images\progress-bg.png
  • %TEMP%\ish213421\images\close.png
  • %TEMP%\ish213421\images\close_hover.png
  • %TEMP%\ish213421\images\Grey_Button.png
  • %TEMP%\ish213421\images\Minimize.png
  • %TEMP%\ish213421\images\default_tb.png
  • %TEMP%\ish213421\images\default_wi.png

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

  • %TEMP%\ish213421\bootstrap_52715.html
  • %TEMP%\0003567E.log
  • %TEMP%\0003417F.log

The following registry elements have been changed:

  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\DIRECTDRAW\MOSTRECENTAPPLICATION\ID = 708992537
  • HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\DIRECTDRAW\MOSTRECENTAPPLICATION\NAME = 80684737F77AC4DE67ECCFAB3FCE8B4D2C2310D4

The applications attempted the following network connection(s):

  • 37.59.20.***:80
  • 54.203.246.**:80
  • hxxp://os.uptodowncdn.com/uptodown/*****
  • 166.78.44.***:80
  • hxxp://dw2.uptodown.com/ic/dw/*****
  • 204.2.145.**:80

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