Can't find application previously identified as malware

The Mac OS's built in security alerted me to an application it identified as malware. I was able to view the application in Finder when I clicked the button. I have since restarted the computer so that window which I only minimized is no longer there. I cannot find the file when I search for it. Now I downloaded a new antivirus software which is not detecting anything. Is there a way to get the Mac to alert me again so I can use this "view" button on the alert to find this application again? Or is it possible the Mac's security has quarantined it somewhere?