Content for this page has been excerpted from the article "iesnare - make sure you're not being snooped on" on The Gambling Times, please see the original article for more information.

What is iesnare?

The main purpose of the system is to block criminal activity where fraudsters use multiple stolen identities / credit cards to sign up for multiple accounts on the same gaming sites.

Whilst this sounds like a good thing and any lawful user shouldn’t have anything to worry about, what is worrying is the fact that your computer’s identity is being monitored as you use it across many different gaming websites. So for example if you use the same machine to sign up to two or more different sites that use the iesnare system, each site will know that you’ve recently signed up somewhere else and potentially earmark you as a criminal or abuser.

Also, you don't get the option to opt in or out of this, the iesnare cookie is installed secretly without your knowledge or explicit permission (as opposed to the permission you give when you agree to the T&C of most gaming sites which probably includes a clause that allows them to use companies like Iovation to track users).

See here for a whitepaper by Iovation on the ieSnare technology:

Who is affected?

You might be affected if:

  • You use a PC with Macromedia Flash installed
  • You access online gaming sites regularly

The name ‘iesnare’ seems to have been used because ‘iesnare’ is the name of the website that installs the dodgy files. However because it has ‘ie’ in it, it doesn’t mean you’re only affected if you use Internet Explorer (IE) or if you only use a Windows based PC. You could use Mozilla Firefox on a Mac or on Linux and still be affected.

How to check if iesnare is installed on your machine

In Windows XP etc, hit 'Windows-key - F' to open the Search window. (press the windows key and the 'f' key at the same time). In Windows Vista, do same as for xp but note you will probably have to goto 'advanced search' and then tick the 'include non-indexed ...' checkbox. Type in 'mpsnare' in the Search window. If iesnare has been used on your machine you'll find one or more of the following folders:


How to disable iesnare

Step 1: Enable access to the file/folder security properties so you can change the permissions on the folders:

Note: you must have administrative privileges on the machine. The following steps are for Windows XP Service Pack 2/3. Open Windows Explorer. Go 'Tools > Folder Options'. Select the 'View' tab. In 'Advanced Settings', scroll down to the bottom and make sure 'Use simple file sharing' is NOT ticked. Click 'OK'. This allows you access to the security settings for each file/folder which isn't usually displayed by default (presumably to stop people from changing important system settings that could make their computer unusable).

Step 2: Deny write access to the iesnare folders:

In Windows, hit 'Windows-key - F' to open the Search window (press the Windows key and the 'F' key at the same time). Type in 'mpsnare' in the Search window. When the search is completed, if iesnare has been used on your machine you'll usually find two or more folders with names like:,, and Select all of these folders, right click and select 'Properties'. Select the 'Security' tab and then in the section where it says 'Permissions for', click the 'Deny' checkbox for each of the permission types (full control, modify, etc) - you can probably get away with just denying write permissions though. Be very careful not to change any other permissions on any other files/folders because this could make your machine unusable.

Step 3: Re-enable simple file sharing

Follow the details in Step 1 above, but make sure the 'use simple file sharing' option IS ticked this time.

Disable iesnare cookies in your web browser

If all that above weren't enough, you should also block any regular HTTP cookies from the domain These are the cookies that you can control from within your web browser (you can't control Flash cookies by default in your web browser):

Firefox 3.0+

  1. Goto the Tools > Options menu.
  2. Click on the Privacy tab.
  3. Click on 'Exceptions'.
  4. Enter '' and click 'Block'

Firefox 3.5.x

  1. Goto the Tools > Options menu.
  2. Click on the Privacy tab.
  3. Select "Use custom settings for history" in the "Firefox will" menu
  4. Click on 'Exceptions' across from "Accept cookies from sites"
  5. Enter '' and click 'Block'

Internet Explorer

  1. Goto the Tools > Internet Options menu item.
  2. Click on the Privacy tab.
  3. Click on 'Sites'.
  4. Enter '' and click 'Block'.

Crippling iesnare by modifying your 'hosts' file

You can visit the Mafia Wars Operations Blog and view This Post for a more in depth tutorial.

This is an alternative to either uninstalling Flash or following the guide above.

The way it works is that you modify a file called 'hosts on your PC so that the iesnare software thinks that your PC actually IS the iesnare website. This way, every time the iesnare software tries to communicate with it's website, it's actually contacting YOUR machine which of course doesn't know anything about iesnare and so the whole communication process fails.

To achieve this:

1 - Log into Windows as Administrator.
2 - Open the 'Run' dialog box (press 'Windows+R' or click 'Start', 'Run').
3 - #Type in (or copy): 'notepad.exe C:\WINDOWS\system32\drivers\etc\hosts' (note replace 'C:' with whatever drive your windows folder is on, :4 - most machines it should be just c: ). Hit 'enter' to open up the file in notepad.

At the end of the file, add the following line:

5 - Save the file (press 'ctrl-s' or go 'File > Save').

To test whether your changes worked:

Open the 'Run' dialog box (press 'Windows+R' or click 'Start', 'Run'). Type in 'cmd' and hit enter, this brings up the commandline. Type in: 'ping' - this will try to send a ping packet to the address that your machine thinks is ''. Type 'exit' to close the command line window.

If your modifications were successful, you should see 'Pinging []' when you run the ping command above. Don't worry if it says 'ping failed' or similar, just the fact that resolves to is enough to know your modifications were successful - this means the iesnare software will think your machine is the website.

Disabling Flash Objects / iesnare in Firefox using 'Objection'

Better Privacy is an addon for the Firefox web browser which allows you to block local shared objects (LSO) - iesnare being an example of a Flash based LSO.

It works in the same way as the built-in cookie blocker does in Firefox, allowing you to enter fully qualified domain names for which you don't want LSOs to be installed.

Lastly, a simple fix for firefox users is every time you start firefox to play, click Tools, Start Private Browsing..That'll block iesnare from sending/receiving data