extract Diskcryptor h4sh

Hello Dears

i have hit by ransomeware , and all my files had encrypted , i found that hashcat :

Support added to crack DiskCryptor (AES) Full-Disk Encryption 100% on GPU. Great contribution from @philsmd


but i didn't able to find clear way to extract the hash from the ecnrypted hdd, i do know that dd command can make backup of the drive but i don't know the right command

you have did amazing effort regarding this issue here :
https://hashcat.net/forum/thread-8012-page-2.html

but it still misisng how to pull the hash !!

kind regards