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Recovery of key systems / network administrator windows (NT4, 2000, XP, Vista)

A few weeks ago I had a little task out of the ordinary. It turns out that among all the servers we have, yet there are several running Windows NT4, among whom were one (which is considered critical for the service provided) for which they had not the system administrator password.

What to do if we have forgotten the administrator password for Windows?

NT stores the user information, including the encrypted version of the passwords in a file named sam in \ winnt \ system32 \ config. This file is part of the register in binary format, not documented and not readily visible. To work with the user passwords in this file before reinstalling the system think we have a couple of alternatives:

How to recover the password or administrator password Windows

Offline NT Password & Registry Editor

This is a utility to re-him to set the password for any user with a local account on a Windows system. Supports Windows NT 4, Windows 2000, Windows XP and Vista in 32 and 64 bit format with support for the NTFS file system.

  • No need to know the password of any user of the system to use it.
  • Works in offline mode offline, since we have to restart the computer and boot from the floppy or CD.
  • Automatically detects and gives the option to unlock locked user accounts or disabled.
  • Also you can edit the registry of the machine.

Ophcrack 2.3.4

Ophcrack is a tool to crack Windows passwords from Rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of this me © everything.

  • Runs on Windows, Linux and Mac OS X (intel).
  • Rompe LM and NTLM hashes.
  • Free tables available for LM hashes alfanumí © wealthy.
  • Load hashes from local SAM and SAM remotely.
  • Load hashes from encrypted SAM recovered from a Windows partition, including Vista.

There are also other great tools in informatics audit tools such as L0phtCrack. Also known com LC5, use dictionary attacks, brute force and hybrid attacks. Unfortunately it was bought by Symantec and discontinued.

Winternals was a product of Sysinternal, also known as ntinternals, the maker of tools to manage and monitor computers running Microsoft Windows systems.

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6 Comments

  1. Hello gentlemen is that I lost my password for my Dell laptop and I can not open my windows manager to enter my information, how do I open it?
    thanks

  2. I've forgotten the administrator contrasenha to start my XP sesion from ubuntu which is on the same computer I have access to the Windows folder, is there any way to find the folder where you saved the contrasenha this administrator?

    Grax

  3. hello good morning I want to know sa password recover my Messengger for the reason that I remember you.

  4. kisira the k my account please help me

  5. They want to enter other people's computers ... the laptop because it must be robdo and can not access .. that of the messenger to steal someone's account and so all ... bunch of crooks

  6. I have the solution to all these problems but unfortunately that's my job and I charge for whoever wants it can write for me and I will gladly attend

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