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Ophcrack is a free open-source (GPL licensed) program that cracks Windows log-in passwords by using LM hashes through rainbow tables.The program includes the ability to import the hashes from a variety of formats, including dumping directly from the SAM files of Windows, and can be run via the command line or using the program’s GUI (Graphical user interface).
pwdump is the name of various Windows programs that outputs the LM and NTLM password hashes of local user accounts from the Security Account Manager (SAM) database and from the Active Directory domain's users cache on the operating system.
For example in case of changing Windows password following command can be used: [20] net user [username] [newpassword](selected user can be later added as new Windows administrator by typing: net localgroup administrators [username] /add). Similarly following command: [21] net user [username] * will erase current Windows password for selected ...
The purpose of password cracking might be to help a user recover a forgotten password (due to the fact that installing an entirely new password would involve System Administration privileges), to gain unauthorized access to a system, or to act as a preventive measure whereby system administrators check for easily crackable passwords. On a file ...
The user-profiling scheme in force today owes its origins to Windows NT, which stored its profiles within the system folder itself, typically under C:\WINNT\Profiles\. Windows 2000 saw the change to a separate "Documents and Settings" folder for profiles, and in this respect is virtually identical to Windows XP and Windows Server 2003.
Windows 1.0–3.11 and Windows 9x: all applications had privileges equivalent to the operating system;; All versions of Windows NT up to, and including, Windows XP and Windows Server 2003: introduced multiple user-accounts, but in practice most users continued to function as an administrator for their normal operations.
The password changing feature is also prone to errors, so password blanking is highly recommended (in fact, for later versions of Windows it is the only possible option). Furthermore, the bootable image might have problems with controllers requiring 3rd party drivers.
L0phtCrack is a password auditing and recovery application originally produced by Mudge from L0pht Heavy Industries. It is used to test password strength and sometimes to recover lost Microsoft Windows passwords, by using dictionary, brute-force, hybrid attacks, and rainbow tables. [3] The initial version was released in the Spring of 1997. [4]