Topic: How can i hack a session if i have cookie details?

Hi All,

I am in the process of testing an application in my organization for the security vulnerabilities.
I saw a tutorial where an attacker launches an attack and get the cookie details of the victim. Now what step is next the hacker will do to launch a successful attack, this is what i want to know.

Can anyone tell me how can i hack/replicate a session of another user (who is logged in to X application) and i have the cookie details of this logged in user?

Thanks in advance.

-Abhi.