FireMaster

About FireMaster
FireMaster is the first ever built tool to recover the lost master password of Firefox. Master password is used by Firefox to protect the stored sign-on information for all visited websites. If the master password is forgotten, then there is no way to recover the master password and user will lose all the sign-on information stored in it. However user can now use FireMaster to get back all their stored credentials. FireMaster supports dictionary, hybrid, brute-force and advanced pattern based brute-force password cracking techniques to recover from simple to complex password. Advanced pattern based password recovery mechanism reduces cracking time significantly especially when the password is complex. Current version supports for automatically discovering default Firefox profile path, Support for showing up larger numbers & total time, Silent mode with no verbose messages and prompts etc.
Firefox Password Manager and Master Password
Firefox comes with built-in password manager tool which remembers username and passwords for all the websites you visit. This sign-on information is stored in the encrypted form in Firefox database files residing in user's profile directory. However any body can just launch the password manager from the Firefox browser and view the credentials. Also one can just copy these database files to different machine and view it offline using the tools such as FirePassword.
Hence to protect from such threats, Firefox uses master password to provide enhanced security. By default Firefox does not set the master password. However once you have set the master password, you need to provide it every time to view sign-on credentials. So if you have lost the master password, then you have lost all the stored credentials as well.
So far there was no way to recover these credentials once you have lost the master password. Now the FireMaster can help you to recover the master password and get back all the sign-on information.
Internals of FireMaster
Once you have lost master password, there is no way to recover it as it is not stored at all. Whenever user enters the master password, Firefox uses it to decrypt the encrypted data associated with the known string. If the decrypted data matches this known string then the entered password is correct. FireMaster uses the similar technique to check for the master password, but in more optimized way. The entire operation goes like this.
FireMaster generates passwords on the fly through various methods. Then it computes the hash of the password using known algorithm. Next this password hash is used to decrypt the encrypted data for known plain text (i.e. "password-check"). Now if the decrypted string matches with the known plain text (i.e. "password-check") then the generated password is the master password.
Firefox stores the details about encrypted string, salt, algorithm and version information in key database file key3.db in the user's profile directory. You can just copy this key3.db file to different directory and specify the corresponding path to FireMaster. You can also copy this key3.db to any other high end machine for faster recovery operation.
FireMaster supports following password generation methods
1) Dictionary Cracking Method In this mode, FireMaster uses dictionary file having each word on separate line to perform the operation. You can find lot of online dictionary with different sizes and pass it on to Firemaster. This method is more quicker and can find out common passwords.   2) Hybrid Cracking Method This is advanced dictionary method, in which each word in the dictionary file is prefixed or suffixed with generated word from known character list. This can find out password like pass123, 12test, test34 etc. From the specified character list (such as 123), all combinations of strings are generated and appended or prefixed to the dictionary word based on user settings.   3) Brute-force Cracking Method In this method, all possible combinations of words from given character list is generated and then subjected to cracking process. This may take long time depending upon the number of characters and position count specified.    4) Pattern based Brute-force Cracking Method Pattern based cracking method significantly reduces the password recovery time especially when password is complex. This method can be used when you know the exact password length and remember few characters.
Video Demonstration of FireMaster
Here is the video demonstration of recovering Firefox master password using FireMaster.  In the video tutorial below it shows how to use Hybrid Crack & Brute-Force Crack method to easily recover the master password
Installing FireMaster
Though FireMaster is a Portable tool, it comes with Installer so that you can install it locally on your system for regular usage. This installer has intuitive wizard (as shown in the screenshot below) which guides you through series of steps in completion of installation. At any point of time you can use Uninstaller to remove the software from the system.
How to use FireMaster?
First you need to copy the key3.db file to temporary directory. Later you have to specify this directory path for FireMaster as a last argument. Here is the general usage information
Firemaster [-q]            [-d -f <dict_file>]            [-h -f <dict_file> -n <length> -g "charlist" [ -s | -p ] ]            [-b -m <length> -l <length> -c "charlist" -p "pattern" ]            <Firefox_Profile_Path> Note: With v5.0 onwards, you can specify 'auto' (without quotes) in place of "<Firefox_Profile_Path>" to automatically detect default profile path.   Dictionary Crack Options:    -d Perform dictionary crack    -f Dictionary file with words on each line     Hybrid Crack Options:    -h Perform hybrid crack operation using dictionary passwords. Hybrid crack can find passwords like pass123, 123pass etc    -f Dictionary file with words on each line    -g Group of characters used for generating the strings    -n Maximum length of strings to be generated using above character list These strings are added to the dictionary word to form the password    -s Suffix the generated characters to the dictionary word(pass123)    -p Prefix the generated characters to the dictionary word(123pass)     Brute Force Crack Options:    -b Perform brute force crack    -c Character list used for brute force cracking process    -m [Optional] Specify the minimum length of password    -l Specify the maximum length of password    -p  [Optional] Specify the pattern for the password
Examples of FireMaster
// Dictionary Crack FireMaster.exe -d -f c:\dictfile.txt auto   // Hybrid Crack FireMaster.exe -h -f c:\dictfile.txt -n 3 -g "123" -s auto    // Brute-force Crack FireMaster.exe -q -b -m 3 -l 10 -c "abcdetps123" "c:\my test\firefox"    // Brute-force Crack with Pattern FireMaster.exe -q -b -m 3 -c "abyz126" -l 10 -p "pa??f??123" auto
Here Firefox_Profile_Path refers to the directory where key3.db file is present. This points to the Firefox profile directory (Ex: C:\Documents and Settings\<user>\Application Data\Mozilla\Firefox\Profiles\<prof name>) on your machine. However you can also copy key3.db file from any other machine such as Linux system to your local windows machine and specify that path during recovering operation.
Quiet mode ( -q option ) will disable printing each password while recovery is in progress. This makes it much faster especially for brute force operation. However during brute force operation if the password count exceeds 50000 passwords then it automatically enters the quiet mode.
Hybrid method tries normal dictionary password as well as password created by appending/prefixing the generated strings to the dictionary word. For example if the dictionary word is "test" and you have specified character set as '123' (-c 123 -s) then the new passwords will be test1, test12, test123, test32 etc.
By default FireMaster includes smaller password list file "passlist.txt". You can find larger password dictionary file here ftp://ftp.openwall.com/pub/wordlists/all.gz
Character list (-g for hybrid and -c for brute force) specifies the characters to be used for generating passwords. If you don't specify then the default character list is used. For brute force -m indicates the minimum length of password to be generated. This can reduce the generated passwords and hence the time considerably when large number of character set is specified. Similarly -l (small 'L') specifies the maximum length of password to be generated. For example, if you specify -m 6 and -l 8 then only passwords which are of length at least 6 and above but below 8 will be generated. Now you can reduce the password cracking time significantly using pattern based password recovery mechanism. If you know that password is of certain length and also remember few characters then you can specify that pattern for brute force cracking. For example, assume that you have set the master password of length 12 and it begins with 'fire' and ends with '123' then command will look like below
FireMaster.exe -b -c "abyz" -l 12 -p "fire?????123" c:\testpath
This will reduce the time to seconds which otherwise would have taken days or hours to crack that password. You can even crack the impossible looking passwords using the right pattern.
FireMaster in Action
FireMaster and FireFox
FireMaster is successfully tested with latest Firefox version 6.0.2 and it can recover master password successfully from any Firefox, starting with version 1.0 or more. If the FireMaster failed to work with your Firefox version then please send me the key3.db and cert8.db (required for older versions) files which are present in your Firefox profile directory. Note that sign-on credentials are stored in the signons.txt file and key3.db just contains the master password related information. So even if some one knows your master password it will be useless unless he/she has access to signons.txt file.
Disclaimer
FireMaster is designed with good intention to recover the lost master password so that every one keep enjoying their experience with Firefox. Like any other tool its use either good or bad, depends upon the user who uses it. However author is not responsible for damages or impact caused due to misuse of FireMaster. Read our complete 'License & Disclaimer' policy here.
Acknowledgement
Thanks to the Mozilla-Firefox crew for making such an excellent, beautiful, free browser. Thanks to everyone who shared their experience with FireMaster through their valuable feedbacks and suggestions.
Free Download FireMaster     FREE Download FireMaster 5.1      (Tested successfully for Firefox version 6.0.2) License  : Freeware Platform : Windows XP, 2003, Vista, Win7 nb : securityxploded