Normalize feed before indexing

Getting Data In

Is possible to rename values of feeds? i am going to explain it better:

I have open source feeds but some values of them are written in different form, for example, i am going to group all malware names under the same field but i have this trouble:

Malware Name

NjRat command & control
NjRat
Njrat
NJraat
Njratt c&c

Is possible to modify them at indexing time under the same name NjRat so when i am going to analyze it i have no problem and they are all grouped?

Thanks in advance

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