How to ban files extension

Hello, anyone has any idea how to ban “+.+” files type except .doc, .xls, .pdf, etc files extensions?
Thanks!!

app ransomware from appStore?

yes… but this app is not working…

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Didn’t try it myself - but what you give is a regex, that does NOT start with a ^. So, maybe it should be _lala ? Just experiment or look at the code…

Thank you @joergschulz for your responses. But I has been try with _lala ^lala lala$ _.lala ^.lala .lala$ etc and is not working :confused:

/^application/(octet-stream|x-ms-dos-executable|x-msi)$/i

put this for exe files in you NC file access rule section.