Cracking common passwords

Network administrators often encounter various password loss problems when maintaining and using computers.Technical CommunityThere is exactly one post: The network manager must know: common computer password cracking, specially for the majority of network administrators to prepare some methods to crack the password, but I hope you do not do bad things. The boot password is the first one we need to deal with, so we should start with the CMOS password cracking. Although there are different types of CMOS, their encryption methods are basically the same. Generally, the method of cracking mainly involves two aspects: "hard" and "soft.

I. CMOS cracking

To use a computer, you must first start the system. Therefore, the boot password is the first one we need to meet. Although there are different types of CMOS, their encryption methods are basically the same. Generally, the method of cracking mainly involves two aspects: "hard" and "soft.

1. Hard Release Method

The hardware method to remove the CMOS password is to discharge the cmosram on the motherboard, so that the parameters stored in the cmosram cannot be properly supplied, leading to content loss, thus canceling the CMOS password. Some newspapers have introduced many common practices on how to crack the CMOS password, such as patch cord transient connection method and battery transient connection method, which is very convenient to operate. But here we want to introduce an alternative technique, which is also a favorite method of computer DIY. The method is also very simple: Open the chassis, unplug the hard drive, optical drive, and soft drive data lines from the motherboard, and then start the computer, the BIOS will report an error during self-check and automatically enter the CMOs, now you can reset the BIOS content.

2. "soft" Release Method

Strictly speaking, the "soft" Release of the CMOS password is not as thorough as the "hard" release method, but it also works very well. The CMOS password can be set to common and super user passwords as needed. The former only limits the modification of the BIOS. It can start the computer and run various types of software normally, while the latter completely prohibits the entry into the computer and bios.

1) crack the password of a common user

Start the computer with a DOS boot disk and enter the DoS Status. Enter debug and press enter in the doscommand line. Then, use any of the methods listed to unbind the CMOS password and restart the computer, the system will tell you that the CMOS parameter is missing and you need to reset the CMOS parameter. After testing, this is a very effective method. "-" The letter "O" after it indicates the output address of the numeric value. Both 70 and 10 are numerical values.

2) crack the superuser password

Here we need to use external tools. We use the most classic biospwds, which is a free software. It is suitable for computer users who are not familiar with DOS. It has been well known for a long time ago, the user's CMOS password is displayed. The latest tool version is 1.21 kb, free of charge: http://bj2.onlinedown.net/soft/8107.htm. After downloading and decompressing the package, double-click the execution file of the software and click "getpasswords" on the displayed page. After two or three seconds, the BIOS information is displayed on the biospwds page, including the BIOS version, BIOS date, and password, you can easily learn the BIOS password.
Ii. Cracking system passwords

The system password is used when you log on to the operating system. It provides security protection for your computer and can protect your computer from illegal users, this ensures the security of computers and confidential data.

1. Windows 98/me system logon Password

① Cancellation Method

The simplest way is to enter a password when logging on to the system. You do not need to enter anything. Click Cancel to enter the operating system. However, this method can only access resources on the local machine. If the computer is part of the LAN, you will not be able to access network resources.

② New users

When you are blocked from the system due to password issues, you may wish to add another user to the system and then log on again. In the same way, you can log on to the system and access system or network resources. Click "start"/"set"/"Control Panel", and double-click "user" to open the "user attributes" dialog box. Enter the user name, password, and personalized project settings as prompted, and click Finish ".

③ Delete the "PWL" File

Delete. the PWL password file and all the personal information files in the profiles subdirectory, and then restart Windows, the system will pop up a password setting box that does not contain any user name, we do not need to enter any content, click "OK" to delete the Windows Password.

④ Modify the Registry

Run the Registry Editor and open "username" under the "HKEY_LOCAL_MACHINE \ Network \ Logon" branch of the registry database to "0". Then, restart the system to remove the password.

2. Crack the WindowsNT Password

If you have a common user account, you can easily obtain the ntadministrator account: First rename logon.scrunder c: \ winntsystem32to logon.old.pdf, and then rename usrmgr.exe to logon. Scr and restart. Logon. scr is loaded when the system starts.ProgramAfter the restart, the User Manager does not appear in the previous logon password input interface. In this case, you have the permission to add yourself to the Administrator group.

3. Windows2000 Password

Start the boot disk to boot the computer or boot into another operating system (such as Windows 98), find the folder "X: \ documentsandsettings \ Administrator" (X is the drive letter of the disk where windows is located ), delete the "cookies" folder in this folder and restart your computer. Then, you can log on to Windows2000 with a blank password.

4. crack the password of Windows XP

When Windows XP is started, press F8 to select the safe mode with command line. You can use the net command to perform operations on the user identity. The procedure is as follows: run the "netuserabcd/Add" command to add a user named ABCD. Run the "netlocalgroupadministratorsabcd/Add" command to promote the user ABCD to the Administrator and restart the computer, log On As an ABCD user and modify the password of the user who forgets the password.
3. Crack several common software passwords

At present, more users know how to use computer software to encrypt some of their information stored in the computer, so that those who do not have the right to read the important information can not easily open this important information. Let's take a look at the release of several common software passwords:

1. Crack WPS series passwords

If you are a legal user, start the WPS program when you forget the password and click the "file"/"password settings" menu, in the displayed password Setting dialog box, you can see that the original password will automatically appear in the "password" text box as "", click "clear, then, in the prompt box that appears, click "OK" to clear the password of the encrypted file. You do not need to enter the password to open the file again. If you are not a legal user, you can only use the relevant tools for cracking. There are a lot of software that can crack WPS passwords, but with its powerful functionality, it is necessary to crack the WPS quickly with the domestic Edward 'swps2000passwordrecovery. This tool uses a common method to crack WPS passwords-brute-force method. The procedure is as follows: first, add the WPS encrypted file to be cracked through the "Browse" button on the right in the "encryptedwps2000file" text box on the program interface; then select the password cracking method, the software has the following password cracking methods: brute-force (strong attack), Dictionary (dictionary attack), and mask (mask search, generally, use the "brute-force" (strong cracking) method. Then, select the possible password range in the "Brute-forcerangeoptions" list box, for example: uppercase/lowercase letters, numbers, spaces, and special characters. In addition, you must specify the password length, for example, 6 characters or longer. Finally, when the preceding settings are complete, click "run" to quickly crack the password.

2. Crack the Word document Password

It may be that Microsoft's office is too eye-catching and there are a lot of cracking software for it. Next let's take a look at how to crack the document password. We choose a Chinese software "97/2000/XP Password viewer", which is a micro-Simplified Chinese Word password relief software with a size of only 29kb. You do not need to install the software. Double-click the executable file. This tool can crack Windows 9x/NT/2000/XP full range of document passwords, you can find a maximum of 13 passwords (unregistered version only supports 3), use the "dictionary-type" brute force cracking. Click the "file"/"open" command in the program to add the document to be cracked. Set the password type in "task attributes". We recommend that you select all the options and enter the password length; click "OK" to return to the main interface and select "operation"/"to start the password cracking command.

3. Crack the Excel document

We chose a tool named advancedexcel97passwordrecovery, Which is 614 K and the latest version 1.01. It can quickly crack the password of an Excel file. After downloading advancedexcel97passwordrecovery, you must install advancedexcel97passwordrecovery. After installation, open the main program interface, open the workbook document to be decrypted by clicking the Browse button, select the password length, and set the password type, finally, click the blue start cracking button. A prompt menu will pop up after the document password has been cracked.

4. Crack the OICQ Password

We use a tool named "OICQ password Terminator. The procedure is as follows: first set the installation directory of your OICQ; then select the character set for search, for example, select the character set of lower-case letters, select the check box before the lower-case letter or select all the boxes under "Basic settings". Then, set the number of digits for the password to be searched. It is recommended that the length be not too long, for example, 8 digits, it will take a long time to know if you have the patience. Finally, click the start button to crack the OICQ password. According to experts on the Internet, the speed of oicqpassovcr can reach thousands of times per second. If the QQ password you want to crack is only 4-5 characters, I want oicqpassover to crack the password within a few minutes.
Iv. Cracking network passwords

The Internet is quietly and quickly entering our daily life. However, as a common network user, people share a common concern, that is, the security risks of the network. So I had to take effective protection measures for my network activities-add various passwords. However, once these passwords are forgotten, they become a major obstacle for us to do our work. The following are some network password cracking techniques.

1. Crack the Internet account and password

As a bridge for daily Internet access, each of us needs to set the Internet account and password during Internet access so that we can log on to the network. Using some tools and software to obtain accounts is not very difficult, or even a breeze. Here we use a tool named getip, which is a "password and password" recognition software designed and developed by Liu Yu, a Chinese speaker. Getip can help us restore the "***" numbers that represent passwords to real passwords. If you need this software, you can download it at http://brain.zb169.net/for free. Getipruns the executable file of getip.exe in ten simple ways. On the program interface, point to "Click (magnifier) and drag" and move the cursor to the desired password, the real password is immediately reflected in the text box.

2. Crack the IE hierarchical review Password

The IE browser provides the hierarchical review function, which can filter some webpages under the user's settings. Only users who know the hierarchical review function and password can view the relevant webpage information. If you forget the password for the hierarchical review function, you will not be able to access the restricted site, but you cannot change the existing restricted level. It is useless to reinstall ie. What should I do? Start Registry Editor, find the "HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ CurrentVersion \ Policies \ ratings" subkey, and find a key value item named "key, it means that the user sets the IE hierarchical review password (the data has been encrypted). You only need to delete this key value to cancel the hierarchical review password, and then reset the IE hierarchical review password.

3. Crack the OE Password

There are three passwords in the OE program: email password, newsgroup password, and user identity confirmation password. The following is a piece of software called "password intercept" (3.1 Special Edition) that runs on Win9x/2000/NT/XP, kb and can be downloaded at http://gaoasp.diy.163.com. The software can be used to crack the Web mailbox password, POP3 PASSWORD, FTP password, and display, save, or send the password to the user's specified mailbox. Password intercept process: the password in the password input box that the software intercepts (such as the password in the dial-up connection, OICQ, or IE ), save the password in plaintext format in the User-Defined file (default: C: \ password.txt). If the password is not intercepted, the password file will not exist. You can also send the obtained password to the specified email address. Password truncation 2.8 supports Windows 9x/NT/2000. The software does not need to be installed. After the software is downloaded and decompressed, it will directly double-click getpassword.exe to run. Click the "mail Settings" option in the figure to send the intercepted password to the specified mailbox, and then click the "Password File" option, set to save the intercepted password in c: \ password.txt of the Local Machine for viewing at any time.

4. Crack Foxmail Password

There are quite a few users who use simple but powerful Foxmail as an email receiving tool. However, due to the security risks of Foxmail, some users only need to create a new account and enter the default installation directory of Foxmail. after the STG file is copied, your account file will be overwritten, and your account password will be cleared.