Normalize IBAN to DE89 3704 0044 0532 0130 00

Elastic Stack Logstash
1

I want to normalize IBAN from DE89370400440532013000 to DE89 3704 0044 0532 0130 00.
any idea using split or grok mutate filter

2

You can use the mutate filter plugin in the Logstash's pipeline. An example of the opposite is given in the following link -> https://stackoverflow.com/questions/31947860/replace-all-into-spaces-in-field-logstash

3

I am doing like this but it's not working
"KRH_IBAN", "\H\H\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D\D",
"\H\H\D\D \D\D\D\ D\D\D\D\D \D\D\D\D \D\D\D\D \D\D"

4

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