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~# crunch 8 8 abcd1234 -o /Desktop/dict.txt -t will now generate the following amount of data: 2359296 bytesĬrunch will now generate the following number of lines: 262144 So, Let us generate a dictionary which contains password with length 8 and has letters abcd and numbers 1234. You can generate the dictionary that fits your needs. There is a very handy tool called crunch which helps in doing this task for us. Although we can use the dictionaries which are already present on the internet( my favorite repo) but in case you want to be more specific with the target you might require to create your own. So before we begin launching attack with hydra, we must be ready with our dictionary of passwords which we are going to use. So, practically we prefer dictionary attacks rather than brute-force. On the other hand, dictionary attacks are selective so, it may provide false positives but it is fast. Brute-force attacks being exhaustive will ensure that you’ll get the field data(password filed, username, etc.), but as it is exhaustive the time taken will vary(will be enormous for secured passwords). list of words(can be letters, characters and also their combinations) from which the target system is penetrated with.

letters, characters, special characters, and their combinations as well) where as in dictionary attack we provide a dictionary i.e. Brute-force attacks are exhaustive attacks which tries all the possibilities (viz. We can think brute-force attack as a superset of dictionary attack. We often use brute-force and dictionary attack interchangeably and it is somewhat right but there is a subtle difference between them. So, before getting our hands dirty with the tool let us first polish some of our basics about dictionary and brute-force attacks. Therefore, this tool is very handy when launching brute-force attacks. These days almost all the websites contain authentication forms.

This post will help us learn how to create our own dictionary of passwords and then launch attacks on login forms using the dictionary we created along with the Kali based tool Hydra.