Hackers invasion


The last two days I´m monitoring 404 errors and somebody is trying to inject some code using one link like this:

Looking the file they pointed I could clearly know there is a hacker stuff and they are trying to invade my site.
I just moved to DH…
I collect 5 different IP´s from this hackers, one idea is to block the IPs but every day the IP is another one.
Is there something I can do ?
I would like some suggestion.

How about blocking an IP range?

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