4 x md5 hash type

[spectra]

Hi Everyone,

I am trying to crack md5 password .

only information I have is that owner of it is hacker . he did upload script contain this hash in my website .
I have some knowledge that hackers tend to use md5 of md5 a lot .
So i did try brutforce:
1-8 characters md5(pass)
1-7 characters md5(md5(pass))
1-7 characters md5(md5(md5(pass)))

how to have  4x md5 and 5x md5 in hashcat  ?