How can I programmatically copy an attachment from a parent record and link individual copies to multiple child records in Creatio Freedom UI?

I need to implement a solution where a parent record has an attachment uploaded. When I click a button, I want to automatically create a copy of this attachment for each related child record, so that every child record will have its own attachment (not just a shared reference). For example, if there are 4 child records, there should be 4 distinct copies of the original attachment, each linked to a different child.