hashcat utils and mask processor are a good point to start with
not long time ago a user posted a perl script, something like comboleeter or similar which is doing this leetspeak conversation for a given word/string whatever for you
edit found it https://www.jimby.name/techbits/recent/comboleetor/ (not mine, so see page for yourself)
so basic work would be, build up your own dict based on that special word and using dict + rules or any other combinator attack like dict + mask, mask + dict to attack your hash
for such a specialised attack you could also go for something like this
build basic wordlist
using hahscat in std-out mode for getting these possibilities
basic + ?a > new list 1
?a + basic > new lsit 2
(do anything with these list like you prefer)
merge | uniq all of them and then go for a basic wordlist + rules attack
not long time ago a user posted a perl script, something like comboleeter or similar which is doing this leetspeak conversation for a given word/string whatever for you
edit found it https://www.jimby.name/techbits/recent/comboleetor/ (not mine, so see page for yourself)
so basic work would be, build up your own dict based on that special word and using dict + rules or any other combinator attack like dict + mask, mask + dict to attack your hash
for such a specialised attack you could also go for something like this
build basic wordlist
using hahscat in std-out mode for getting these possibilities
basic + ?a > new list 1
?a + basic > new lsit 2
(do anything with these list like you prefer)
merge | uniq all of them and then go for a basic wordlist + rules attack