hacking / problem solving

How to Hack Passwords

Here’s the guy who knows. Read this article. It’s important! I’ve summarized hacked-computer-june08some of its critical parts:

How I’d Hack Your Weak Passwords

If you invited me to try and crack your password, you know the one that you use over and over for like every web page you visit, how many guesses would it take before I got it?

Let’s see… here is my top 10 list.

  1. Your partner, child, or pet’s name, possibly followed by a 0 or 1 (because they’re always making you use a number, aren’t they?)
  2. The last 4 digits of your social security number.
  3. 123 or 1234 or 123456.
  4. “password”
  5. Your city, or college, football team name.
  6. Date of birth – yours, your partner’s or your child’s.
  7. “god”
  8. “letmein”
  9. “money”
  10. “love”

Statistically speaking that should probably cover about 20% of you. But don’t worry. If I didn’t get it yet it will probably only take a few more minutes before I do…

So, how would one use this process to actually breach your personal security? Simple. Follow my logic:

  • You probably use the same password for lots of stuff right?
  • Some sites you access such as your Bank or work VPN probably have pretty decent security, so I’m not going to attack them.
  • However, other sites like the Hallmark e-mail greeting cards site, an online forum you frequent, or an e-commerce site you’ve shopped at might not be as well prepared. So those are the ones I’d work on.
  • So, all we have to do now is unleash Brutus, wwwhack, or THC Hydra on their server with instructions to try say 10,000 (or 100,000 – whatever makes you happy) different usernames and passwords as fast as possible.
  • Once we’ve got several login+password pairings we can then go back and test them on targeted sites.
  • But wait… How do I know which bank you use and what your login ID is for the sites you frequent? All those cookies are simply stored, unencrypted and nicely named, in your Web browser’s cache. (Read this post to remedy that problem.)

Here are some password tips:

  1. Randomly substitute numbers for letters that look similar. The letter ‘o’ becomes the number ‘0′, or even better an ‘@’ or ‘*’. (i.e. – m0d3ltf0rd… like modelTford)
  2. Randomly throw in capital letters (i.e. – Mod3lTF0rd)
  3. Think of something you were attached to when you were younger, but DON’T CHOOSE A PERSON’S NAME! Every name plus every word in the dictionary will fail under a simple brute force attack.
  4. Maybe a place you loved, or a specific car, an attraction from a vacation, or a favorite restaurant?
  5. You really need to have different username / password combinations for everything. Remember, the technique is to break into anything you access just to figure out your standard password, then compromise everything else. This doesn’t work if you don’t use the same password everywhere.
  6. Since it can be difficult to remember a ton of passwords, I recommend using Roboform. It will store all of your passwords in an encrypted format and allow you to use just one master password to access all of them. It will also automatically fill in forms on Web pages, and you can even get versions that allow you to take your password list with you on your PDA, phone or a USB key. If you’d like to download it without having to navigate their web site here is the direct download link.
  7. Once you’ve thought of a password, try Microsoft’s password strength tester to find out how secure it is.

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