FTP hack of two web sites

[backdropman1 () yahoo com]

Seeking any advice on what to do or how to proceed on an FTP attack which left me the IP address of the hacker in my 
Logs?
So far I have given the IP address to their ISP but I have no idea what if anything the ISP did.
It would fall under one of these sections od 18 USC

18usc1030

18usc2520

18usc2510

Any help would be greatly appreicated and thanks in advance.

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