1. Install BurpSuite Pro (or any version where extensions are enabled)

2. Add the Jython jar

Determine which cookie(s) are required to maintain the session. It does this by making a series of requests: first establishing the request/response is predictable, next making sure cookies are required, then removing a cookie at a time until only the session cookies are left.

1. Start burp and use the Extensions tab to add the G2DetermineSessionCookie python file

2. Login into an application

3. Using the Proxy History tab right click a request/response which is somewhat reliable (will not change too much if you request it over and over) but will change if you're not logged in.

4. Select G2DetermineSessionCookie