Hi Jose,
By default, the ASA won't keep track of the source and destination IPs that trigger these messages. However, you can enable these statistics with the following command:
threat-detection scanning-threat
If you don't add the 'shun' keyword to the end of the above command, traffic will be allowed according to your existing security policy (ACLs, inspections, etc.).
Once the command is enabled, you can do 'show threat-detection scanning-threat' to see the list of targets and attackers that the ASA has identified.
Hope that helps.
-Mike
