Help - Strange App That Opens/Closes in the Dock

Hello,

I have noticed that periodically some sort of program pops up in my dock for a split second, then disappears. It's too quick to click it with my mouse or see what the icon looks like. Nothing different shows up in my recent apps menu. I have no idea what this program is. Is there a way I can track what programs open on my Mac to find out what this program is? Or does anyone know what this could be?

 

Randomly AFAIK.

Usually I have Safari open and that's it. Happens random even if the program has been running for a while. Sometimes only Finder is running and it pops up.

I got to see the icon for a split second, all I can say is it looks kind of like a blue document with something black in front of it. I couldn't screen capture fast enough. Its like if you opened a program and it closed immediately after.