I'm new to splunk. Have deployed splunk 7.2.4 on windows 2012.
Can you please suggest me few uses cases which can be done using application logs. Thanks.
You can do a number of use cases - based on your OS and/or applications deployed on it. All boils down to what you need for your organization.
You could look at the following to the list of use cases and you can choose what you need.
https://www.ultimatewindowssecurity.com/securitylog/quickref/default.aspx - Start with Security log quick reference
https://splunkbase.splunk.com/app/742/ Splunk add on for Windows - to monitor log on attempts, audit changes etc..
https://splunkbase.splunk.com/app/3435/ Security essentials app having a number of use cases.
https://splunkbase.splunk.com/app/3593/ Ransomware detection