Since a few days,
Little Snitch warned me after every reboot that a process called
ISMUpdateChecker wanted to connect to
retro.alt-it.com. I did not know where this process came from, so I googled for it before allowing to connect to the internet - only to find that neither Google nor the other search sites knew anything about ISMUpdateChecker.
Well, turns out that alt-it.com is the hoster of
www.islayer.net which last week released
iStat menus. This nifty little application now sits in my Menu Bar and informs me about the CPU-activity, RAM usage and temperature of my MacBook Pro. And since ISMUpdateChecker is the
iStat
menus
Update Checker there's not much to worry about this process I guess.

Rafael: Thank you very much, I was having a huge headache to solve the very same problem!