VirtualBox Windows logon password cracking method under virtual machine

VirtualBox Windows logon password cracking method under virtual machine

The development of virtual machines in the last two years has brought great convenience to the developers, and the installation of a new environment requires only a copy of the virtual machine files from others, which can be done in minutes. I've been working under Ubuntu for a while, and Windows is using it occasionally, so I installed a Windows 7 under Ubuntu VirtualBox. This year the work environment was migrated to the Mac air, but occasionally there is the use of Windows, so directly from my original Ubuntu under the Win7 VDI file copy to air, you can directly use the Win7, Eliminates the effort to reinstall Win7 and the huge office components.

Two days ago, open the VirtualBox under the Mac Air, start the Win7 virtual machine, after entering the password in the Win7 login interface, the system prompts me for the wrong password. Repeated input several times, the password I used to try it again still can not enter. I can only use the Win7 temporarily under the original Ubuntu. But after all, there is no Win7 on air very inconvenient, some word, PPT documents need to be transmitted on two days machine. Helpless, I have been re-installed under the air a Win7 even WIN8 plan.

Today there is a PowerPoint task, which is again on the agenda. I changed my mind: Can you crack the Win7 login password? So help degree Niang (Google away for a long time). Not to mention, there is really a way to crack, mostly through the PE tool tray to quickly modify the login password. But the PE tool tray is very large (hundreds of trillion, the company download inconvenience), my is the virtual machine environment, this method is not my dish ah. Then saw another way of thinking: booting from a Linux LiveCD or installation disk, the Mount Windows partition, renaming C:\Windows\System32\cmd.exe to Osk.exe. Osk.exe is a virtual keyboard program. This virtual keyboard program can be launched in the lower left corner of the Win7 login page. Once I replace it successfully, the Startup virtual keyboard program becomes the startup Win7 command-line program. With the command line, we can view the current account list and reset the password of a user through the net user command. The idea is very clear, is my dish.

On my Ubuntu machine there are a few Linux distributions live CD ISO files, such as Ubuntu 14.04.1 Desktop, Centos7 desktop, but the size is too big to reach my air is still very laborious. I think it's best to have a tiny Linux distribution. Niang told me there are many options. I first chose tiny Core Linux, and Tinycore-5.4.iso was less than 14M. You then open the Settings page of the Win7 virtual machine and insert the Tinycore-5.4.iso as a virtual ISO into the IDE CD drive. The start of Tinycore is the second thing. Tinycore's desktop style mimics Mac OS, and a dock bar is placed underneath the desktop. Tinycore comes with Mount Tools, opens, with the mouse click on the sda2,sda2 drive letter from red to green, indicating mount success.

Open Tinycore Terminal program, enter/MNT/SDA2, this want to install the plan to modify Cmd.exe name, but tiny core tip: This is a read-only Filesystem. Obviously this is a read-only mount. So various attempts to read and write hanging in (including modifying/etc/fstab, Mount-a, Mount-o remount, etc.), can not change the read-only filesystem fact, so give up.

The release of the People: Cdlinux, this release appears to be no longer updated, the latest version cdlinux_mini-0.9.7.1.iso, released March 18, 2012. The size of the cdlinux is slightly larger than Tinylinux, 36M. The cdlinux starts slightly slower, and is just console only (Standard Edition with desktop environment) and no graphical desktop. After entering the command line, execute the Mount command, found that/dev/sda2 is actually the RW way to Mount/media/xxx under the, so enter the directory, try Touch test.txt, completely no problem.

Then according to the program description, the C:\Windows\System32 under the Osk.exe back up, the Cmd.exe renamed to Osk.exe.

Delete the disc, start Win7, enter the landing page, click the "Easy Access" button in the lower left corner, select "Do not use keyboard typing", OK. The command-line window pops up.

Executes the net user View user Name list in the command-line window. My username is Tonybai, and the password for Tonybai is reset through the net user Tonybai NewPassword. After successful execution, log in with the new password and successfully enter Win7 Desktop. Crack success!

http://tonybai.com/2014/10/29/crack-windows-logon-password-under-virtualbox/

VirtualBox Windows logon password cracking method under virtual machine