Let's perform the following steps:

1. Once we have the Meterpreter and system privileges, we can load up Mimikatz using the following command:

load mimikatz

2. To view all of the available options, type the following command:

help mimikatz

The output of running the preceding command can be seen in the following screenshot:

3. Now, to retrieve passwords from memory, we will use the built-in msv command of Metasploit:

msv

The output of running the preceding command can be seen in the following screenshot:

4. We can see that the NT LAN Manager (NTLM) has been shown on screen. To view Kerberos credentials, type in the following command:

kerberos

The output of running the preceding command can be seen in the following screenshot:

If there were any credentials, they would have been shown in the preceding screenshot.