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OPHCRACKDefinition – Ophcrack is a free Windows password cracker based on rainbow tables. – It comes with a Graphical User Interface and runs on multiple platforms. BASIC DESCION MAKING UNITS IN ECONOMY 3 OPHCRACK
OPHCRACK⁻ Larger rainbow tables contain LM hashes of passwords with all printable characters, including symbols and spaces.⁻ Ophcrack is available for Windows XP and as well as another for Windows Vista and Windows7.⁻ It become disable for the password longer than 14 characters. 4 OPHCRACK 4
RAINBOW TABLE⁻ A rainbow table is a precomputed table for reversing cryptographic hash functions, usually for cracking password hashes.⁻ Tables are usually used in recovering the plaintext password, up to a certain length consisting of a limited set of characters.⁻ These are different for different windows including XP,Vista etc. OPHCRACK 5
How to use?⁻ Load the Ophcrack CD to the computer, install and run it.⁻ Click Tables, and select the location or folder to store the rainbow hash tables.⁻ Go to the option Load and select the appropriate password LM (LAN Manager) hash to use.⁻ Select the type of tables you wish to use.⁻ Click Launch to start the cracking process. OPHCRACK 6
ADVANTAGES⁻ Free Windows password recovery software.⁻ Works for Windows 7/Vista/XP.⁻ No software installation is necessary to recover passwords.⁻ No knowledge of any existing passwords is necessary.⁻ Graphical User Interface and runs on multiple platforms. OPHCRACK 7
DISADVANTAGES⁻ Some antivirus programs mistakenly identify Ophcrack as a Trojan.⁻ The large ISO image will take you much time to download.⁻ Passwords greater than 14 characters cannot be cracked.⁻ Do not work for Windows server 2008(R2)/2003(R2)/ 2000. OPHCRACK 8