hashcat is the world’s fastest and most advanced password recovery utility, supporting five unique modes of attack for over 300 highly-optimized hashing algorithms.
Command:
hashcat64.exe -m 1000 -a 3 -w 4 --session vol1 hash.txt -i --increment-min 3 --increment-max 8 ?a?a?a?a?a?a?a?a -O