sucrack is a multithreaded Linux/UNIX tool brute-force cracking tool that drives su with referencing a specific user and uses words from a wordlist as passwords. Running sucrack does not require high privileges on the target system.
sucrack [-char] [-w num] [-b size] [-s sec] [-u user] [-l rules] wordlist
h : print this message a : ansi escape codes not available. Use the --enable-statistics configure flag. s sec : statistics display interval not available. Use the --enable-statistics configure flag. c : only print statistics if a key other than `q' is pressed. (default) r : enable rewriter w num : number of worker threads running with b size : size of word list buffer u user : user account to su to l rules : specify rewriting rules; rules can be: A = all characters upper case F = first character upper case L = last character upper case a = all characters lower case f = first character lower case l = last character lower case D = prepend digit d = append digit e = 1337 characters x = all rules
cyborg@cyborg:~$ sucrack -w 100 -u cyborg dict.txt password is: toor