So here's the fun and exciting part. You can literally get the hashes of the domain credentials stored in the registry using hashdump. What I mean to say is that you can actually get the passwords of the users. These are NTLM hashes. These hashes can be cracked using online NTLM crackers like crackstation.net

Usage

volatility -f memory.dump --profile=Win7SP1x86 hashdump