md5 cracking with rules

[Snoopy]

do you mean 4 digits randomly inserted into the word or appended, its not really clear



stupid 4 digit append would be constructing a rulesset like that

Code:

$0000 > password0000
$0001 > password0001
$0002 > password0002
...

But this can be done simpler by a combinator attack of your wordlist with a second one, you can generate the second list like this

Code:

hashcat -a 3 --stdout -1 ?d ?1?1?1?1 > digit.list

https://hashcat.net/wiki/doku.php?id=combinator_attack

inserting randomly 4 digits at 4 places or one into a word is a little more complicated

inserting 4 digits at one position would be generating rules like this
iNX (insert X at N)

Code:

i00i00i00i00 > 0000password
i01i00i00i00 > 0001password
....
i10i10i10i10 > p0000assword
i11i10i10i10 > p0001assword

this example above should be possible to be generated by maskprocessor, see https://hashcat.net/wiki/doku.php?id=rul...kprocessor 

inserting one digit at 4 "random" positions would be generating all possibilitys

Code:

i[0-5][0-9]i[0-5][0-9]i[0-5][0-9]i[0-5][0-9]

not sure if this is possible with maskprocessor