"net user" command with vb.net

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Hello,

I tried to create a small application using vb.net which has a button and textbox.

User inputs new password to which is to be set as new password in the text box and click on the button does the following :

VB

Shell("net user administrator *")
Thread.Sleep(3000)
AppActivate(Application.StartupPath & "\Simple WinHack.vshost.exe")
SendKeys.SendWait(TextBox1.Text)
SendKeys.SendWait("{ENTER}")
SendKeys.SendWait(TextBox1.Text)
SendKeys.SendWait("{ENTER}")
MsgBox("Windows Password has beeen removed successfully.", MsgBoxStyle.Information)

After executing Shell("net user administrator *"), It opens CMD and asks for new password and repeat password, I input that using SendKeys.

But, Somewhat doesn't work, MessageBox appears and Execution ends but password not changed.

Posted 27-Oct-13 4:41am

jenitshah

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Dave Kreskowiak · Answer 1 · 2013-10-27T05:54:00

Solution 1

The account this code is running under must have permissions to change the password.

This is also the worst way to change a password. Using WMI or the Win32 API is far more appropriate and you have much greater control.

Posted 27-Oct-13 5:54am

Dave Kreskowiak

Comments

jenitshah 27-Oct-13 23:21pm

Account is having permissions. Also When I try with only Sending {ENTER}s twice, I am getting reset the password, problem only occurs while I try sending string.

Win32 API function requires old / current password, This one doesnt require.

Dave Kreskowiak 28-Oct-13 7:24am

If you mean the NetUserChangePassword function, yes it does. It's the function that's called by the Change Password lock screen option.

But, NetUserSetInfo[^] doesn't need the previous password. You just need to pass in a USER_INFO_1003 structure with the new password in it.

jenitshah 28-Oct-13 8:48am

Finally, I done it. Only problem was the window was not focused even after "AppActive(..", After I set AppWinStyle to NormalFocus It works perfectly. Thanks.