130

I’m wondering where I can find good collections of dictionaries which can be used for dictionary attacks?

I've found some through Google, but I’m interested in hearing about where you get your dictionaries from.

  • 4
    Note that "dictionary attack" is not exactly the same thing as "brute force attack"... – AviD Dec 29 '10 at 16:10
  • 1
    Not an answer, but in a pinch you could always grab the linux dictionary file, it's normally there. – Incognito Dec 29 '10 at 23:06
  • 2
    What are you using it for? – Bryan Field Dec 29 '10 at 23:21
  • 3
    @GeorgeBailey, penetration testing. – Chris Dale Feb 20 '12 at 12:55
  • 1
    @GeorgeBailey I needed a list of rejectable passwords for a password change function on our website. – Mike Apr 22 '16 at 16:44

10 Answers 10

61

Nice list collected by Ron Bowes you can find here:
http://www.skullsecurity.org/wiki/index.php/Passwords.

Other list is from InsidePro:
https://web.archive.org/web/20120207113205/http://www.insidepro.com/eng/download.shtml.

44

An important one that hasn't been added to the list is the crackstation wordlist

The list contains every wordlist, dictionary, and password database leak that I could find on the internet (and I spent a LOT of time looking). It also contains every word in the Wikipedia databases (pages-articles, retrieved 2010, all languages) as well as lots of books from Project Gutenberg. It also includes the passwords from some low-profile database breaches that were being sold in the underground years ago.

Best thing is, its free, although you can (and should!) make a donation!

  • 1
    Thanks D3C4FF,<br> 4GB + wordlist? Wow thanks for sharing that!<br> And thanks Crackstation.net ....<br> Sorry, I dont have any money to donate right now... but i have bookmarked you and you will get your donation in the future...<br> Worth every penny! Thanks Again Vishnu – user26839 Jun 7 '13 at 12:39
28

Some additional ones to add to those already suggested

  • 1
    Either the Oxford one is now broken or not publicly available. – AjahnCharles Oct 23 '17 at 17:21
15

Try the CrackLib dictionaries: https://web.archive.org/web/20161225012801/http://linux.maruhn.com/sec/cracklib-dicts.html

11

I tested the likelihood of collisions of different hashing functions. To help test, I tried hashing

  • all 216,553 words in the English language. Start with those 17.7 bits.

  • then the list of all 2,165,530 English words with one digit after it. (21.0 bits)

  • then the list of all 21,655,300 English words with two digits after it. (24.4 bits)

  • then the list of all 524,058,260 English words with a possible capital as the first letter, and followed by zero, one, or two digits. (29.0 bits).

With one list of English words you'll cover nearly everyone's password.

Note: XKCD is always relevant

  • I have no idea why you got downvoted. This is the most relevant answer. – Ryan Ward Apr 5 '13 at 20:11
  • 1
    When cracking, these permutations (adding a digit, capitalizing) are usually done with "rules". For example, Hashcat takes a given dictionary and applies a user-defined set of rules (hashcat.net/wiki/doku.php?id=rule_based_attack). This allows a trade-off between disk space and processor resources. – mcgyver5 Mar 10 '14 at 12:19
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    Your second link (all words in the English language) gives a 404 now, but it has been archived by the WayBack machine. – ComFreek Jun 7 '14 at 9:18
  • A list of all english words is an acceptable starting point, but not a particularly good one. For example, the very simple and very popular passwords of "123456", "asdasd" and "letmein" would not be found by an approach used in this post; you want to start with specific lists of common passwords instead of an english dictionary. – Peteris Jan 18 '17 at 11:07
9

Another good source is here http://blog.g0tmi1k.com/2011/06/dictionaries-wordlists/

snippet:

[Analysis] Dictionaries & Wordlists
In general, it's said that using a GOOD 'dictionary' or 'wordlist' (as far as I know, they're the same!) is 'key'. But what makes them GOOD? Most people will say 'the bigger, the better'; however, this isn't always the case... (for the record this isn't my opinion on the matter - more on this later).

7

You'll find lots of words in lots of languages on the download page for the English Wiktionary. enwiktionary-latest-all-titles-in-ns0.gz contains just page titles, including phrases - it might have underscores instead of spaces though. (we have English definitions of words from many languages).

And of course there's also WordNet.

(sorry but as a newbie I can only include one link)

7

All the posts so far have great information, but remember you can always generate word lists yourself with a utility like crunch.

If you have an idea of what the password parameters are (for example, has to be 8-10 chars with only letters and numbers, no symbols), you can pipe crunch to most bruteforce programs with the tailored parameters.

3

This is one that I have found useful over the years:

https://github.com/danielmiessler/SecLists

It includes popular passwords, fuzzing based on attack type and popular user names.

-1

Have you considered instrumenting OpenSSH to log password attempts. Its common to log thousands of attempts every day for an internet connected host. That will give you a list of several thousand common passwords that have some track record of success AND hint at users other than root which are common targets (e.g. nagios, db admins etc). Once you have a list then you can then use cewl to generate many more variations of these basic passwords.

I'd also recommend looking up lists of male/female names: a huge number of passwords are based on name. Again, once you have a basic list using cewl on it will generate many variations.

protected by Jeff Ferland Jul 13 '15 at 20:50

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