Get the Whitepaper called Credential Dumping Cheatsheet. It covers locations of data and various tooling you can use to find passwords.
You can download it from the following link: https://packetstormsecurity.com/files/download/161906/credential_dumping.pdf
Source: https://packetstormsecurity.com/files/161906/Credential-Dumping-Cheatsheet.html