how to extract valid digital certificate and put it on other program

how to extract valid digital certificate and put it on other program i try Disitool by Didier Stevens

disitool.py extract signed-file signature

but It is not a tool to digitally sign executables, use signtool for this. When you add or copy a signature from one file to another file, the signature will not be valid. also try MimiKatz but can't success with me, see hackcon2013-Dirty Little Secrets They Didn't Teach You In Pentesting Class

• how can extract valid digital certificate to put it on other program


• can i put digital certificate on other executables and be valid


• I am working on this matter as a graduate, but I need some help