Nikunj Shah, team lead of EventTracker SIEM Simplified team provides some practical tips on analyzing login and pre-authentication failures:
1) Learn and know how to identify login events and their descriptions. A great resource to find event IDs is here: http://technet.microsoft.com/en-us/library/cc787567(v=ws.10).aspx.
2) Identify and look into the event description. To analyze events efficiently and effectively you must analyze the event description. Within the login failure description, paying attention to the details like: failure reason, user name, logon type, workstation name and source network address are critical to your investigation and analysis. By identifying the description and knowing what to pay attention to, you will easily eliminate the noise.
When using a system like EventTracker, the display of the required fields used to showcase eliminates the noise and show you the immediate error results. EventTracker will provide a summary based on the total number of events for each failure type and user name to demonstrate the automation of your systems’ critical information.
Using IDS will help your enterprise run more efficiently and effectively with the analysis of traditional reports for the hundreds of events that happen every day. Doing this without the help of a management and a monitoring tool is nearly impossible.
Please reference here for detailed charts.