Encountered a possible hacker, need help with the logs.

[Shepuz 10]

So, about 5 minutes ago it seems a hacker might had made a visit to our server. Me and one other were gunned down by what sounded like a Light Machinegun, I quit the server but one of our group stays behind, spawns at the coast and as he was going through some loot he was fired upon by what according to him, sounded like the same exact weapon. I'm new to this admin stuff and went through the server logs to see if anything seemed weird and I'd need some help in this task. This is the only one I found to be weird:

21.09.2012 11:34:20: XXXXXXXXXX (XXXXXXXXXXXXXXXX) XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX - #220 "rivate ["_dummy"]; _dummy = [_this,"players"] execVM "\ca\ui\scripts\dedicatedServerInterface.sqf";"

Is it possible that the person who left this behind on the logs has been hacking or doing something nasty?

EDIT: After some looking around what I figured was that this might have something to do with the Server Settings button ingame, I'm using the latest scripts.txt and others from that one website and normally when someone clicks the buttong BE kicks them off, but this did not happen after this particular person did what ever he did.

Edited September 21, 2012 by Shepuz

[excelsior 20]

This is a log you will regularly see from a lot of players. I see it for my own character and I know I am not cheating. So I say you are good.