0x00 Powershell ExecutionPolicy（执行策略）

设置执行策略(Set-ExecutionPolicy)

Powershell默认的权限策略是：“Restricted”

查看当前执行策略：

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PS C:> Get-ExecutionPolicy
Restricted

查看所有执行策略：

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PS E:>  [System.Enum]::GetNames([Microsoft.PowerShell.ExecutionPolicy])
Unrestricted # 权限最高，可以不受限制执行任何脚本。
RemoteSigned # 本地脚本无限制，但是对来自网络的脚本必须经过签名
AllSigned    # 所有脚本都必须经过签名才能在运行
Restricted   # Powershell默认的策略，不允许任何脚本执行
Default      # 为Powershell默认的策略
Bypass       # 无任何限制策略，不警告、不提示
Undefined    # 当前范围中没有设置执行策略

设置执行策略：

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Set-ExecutionPolicy -ExecutionPolicy <PolicyName>

设置执行策略，并设置影响对象：

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Set-ExecutionPolicy -ExecutionPolicy <PolicyName> -Scope <scope>

执行策略影响范围（Scope）

影响范围：Scope ，设置策略时选择影响对象。

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PS C:>Get-ExecutionPolicy -List
        Scope ExecutionPolicy
        ----- ---------------
MachinePolicy       Undefined
   UserPolicy       Undefined
      Process       Undefined
  CurrentUser    RemoteSigned
 LocalMachine       AllSigned

• CurrentUser：执行策略仅影响当前用户。它存储在HKEY_CURRENT_USER注册表子项中。
• Process ： 执行策略仅影响当前会话（当前的PowerShell进程）。
• LOCALMACHINE ：执行策略会影响当前计算机上的所有用户。它存储在HKEY_LOCAL_MACHINE注册表子项中。

修改执行策略需要管理员权限

删除执行策略

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Set-ExecutionPolicy Undefined

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Set-ExecutionPolicy Undefined -Scope LocalMachine

设置会话执行策略

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powershell -ExecutionPolicy Bypass ...

0x01 Nishang

Nishang is a framework and collection of scripts and payloads which enables usage of PowerShell for offensive security, penetration testing and red teaming. Nishang is useful during all phases of penetration testing.

0x02 Usage

Import all the scripts in the current PowerShell session (PowerShell v3 onwards).

如何使用：导入所有的脚本到当前的Powershell会话中，但是Powershell的版本必须是version 3。

导入命令：

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PS C:\nishang> Import-Module .\nishang.psm1

单独导入：

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PS C:\nishang> . C:\nishang\Gather\Get-Information.ps1
PS C:\nishang> Get-Information

获取函数的帮助信息可以这样输入：

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To get help about any script or function, use:

PS C:\nishang> Get-Help [scriptname] -full

0x03 模块分类

Scripts

Nishang currently contains the following scripts and payloads.

ActiveDirectory

Set-DCShadowPermissions

Modify AD objects to provide minimal permissions required for DCShadow.

Antak - the Webshell

Antak

Execute PowerShell scripts in memory, run commands, and download and upload files using this webshell.

Backdoors

HTTP-Backdoor

A backdoor which can receive instructions from third party websites and execute PowerShell scripts in memory.

DNS_TXT_Pwnage

A backdoor which can receive commands and PowerShell scripts from DNS TXT queries, execute them on a target, and be remotely controlled using the queries.

Execute-OnTime

A backdoor which can execute PowerShell scripts at a given time on a target.

Gupt-Backdoor

A backdoor which can receive commands and scripts from a WLAN SSID without connecting to it.

Add-ScrnSaveBackdoor

A backdoor which can use Windows screen saver for remote command and script execution.

Invoke-ADSBackdoor

A backdoor which can use alternate data streams and Windows Registry to achieve persistence.

Add-RegBackdoor

A backdoor which uses well known Debugger trick to execute payload with Sticky keys and Utilman (Windows key + U).

Set-RemoteWMI

Modify permissions of DCOM and WMI namespaces to allow access to a non-admin user.

Set-RemotePSRemoting

Modify permissions of PowerShell remoting to allow access to a non-admin user.

Bypass

Invoke-AmsiBypass

Implementation of publicly known methods to bypass/avoid AMSI.

Client

Out-CHM

Create infected CHM files which can execute PowerShell commands and scripts.

Out-Word

Create Word files and infect existing ones to run PowerShell commands and scripts.

Out-Excel

Create Excel files and infect existing ones to run PowerShell commands and scripts.

Out-HTA

Create a HTA file which can be deployed on a web server and used in phishing campaigns.

Out-Java

Create signed JAR files which can be used with applets for script and command execution.

Out-Shortcut

Create shortcut files capable of executing PowerShell commands and scripts.

Out-WebQuery

Create IQY files for phishing credentials and SMB hashes.

Out-JS

Create JS files capable of executing PowerShell commands and scripts.

Out-SCT

Create SCT files capable of executing PowerShell commands and scripts.

Out-SCF

Create a SCF file which can be used for capturing NTLM hash challenges.

Escalation

Enable-DuplicateToken

When SYSTEM privileges are required.

Remove-Update

Introduce vulnerabilities by removing patches.

Invoke-PsUACme

Bypass UAC.

Execution

Download-Execute-PS

Download and execute a PowerShell script in memory.

Download_Execute

Download an executable in text format, convert it to an executable, and execute.

Execute-Command-MSSQL

Run PowerShell commands, native commands, or SQL commands on a MSSQL Server with sufficient privileges.

Execute-DNSTXT-Code

Execute shellcode in memory using DNS TXT queries.

Out-RundllCommand

Execute PowerShell commands and scripts or a reverse PowerShell session using rundll32.exe.

Gather

Check-VM

Check for a virtual machine.

Copy-VSS

Copy the SAM file using Volume Shadow Copy Service.

Invoke-CredentialsPhish

Trick a user into giving credentials in plain text.

FireBuster FireListener

A pair of scripts for egress testing

Get-Information

Get juicy information from a target.

Get-LSASecret

Get LSA Secret from a target.

Get-PassHashes

Get password hashes from a target.

Get-WLAN-Keys

Get WLAN keys in plain text from a target.

Keylogger

Log keystrokes from a target.

Invoke-MimikatzWdigestDowngrade

Dump user passwords in plain on Windows 8.1 and Server 2012

Get-PassHints

Get password hints of Windows users from a target.

Show-TargetScreen

Connect back and Stream target screen using MJPEG.

Invoke-Mimikatz

Load mimikatz in memory. Updated and with some customisation.

Invoke-Mimikittenz

Extract juicy information from target process (like browsers) memory using regex.

Invoke-SSIDExfil

Exfiltrate information like user credentials, using WLAN SSID.

Invoke-SessionGopher

Identify admin jump-boxes and/or computers used to access Unix machines.

MITM

Invoke-Interceptor

A local HTTPS proxy for MITM attacks.

Pivot

Create-MultipleSessions

Check credentials on multiple computers and create PSSessions.

Run-EXEonRemote Copy and execute an executable on multiple machines.

Invoke-NetworkRelay Create network relays between computers.

Prasadhak

Prasadhak

Check running hashes of running process against the VirusTotal database.

Scan

Brute-Force

Brute force FTP, Active Directory, MSSQL, and Sharepoint.

Port-Scan

A handy port scanner.

Powerpreter

Powerpreter

All the functionality of nishang in a single script module.

Shells

Invoke-PsGcat

Send commands and scripts to specifed Gmail account to be executed by Invoke-PsGcatAgent

Invoke-PsGcatAgent

Execute commands and scripts sent by Invoke-PsGcat.

Invoke-PowerShellTcp

An interactive PowerShell reverse connect or bind shell

Invoke-PowerShellTcpOneLine

Stripped down version of Invoke-PowerShellTcp. Also contains, a skeleton version which could fit in two tweets.

Invoke-PowerShellTcpOneLineBind

Bind version of Invoke-PowerShellTcpOneLine.

Invoke-PowerShellUdp

An interactive PowerShell reverse connect or bind shell over UDP

Invoke-PowerShellUdpOneLine

Stripped down version of Invoke-PowerShellUdp.

Invoke-PoshRatHttps

Reverse interactive PowerShell over HTTPS.

Invoke-PoshRatHttp

Reverse interactive PowerShell over HTTP.

Remove-PoshRat

Clean the system after using Invoke-PoshRatHttps

Invoke-PowerShellWmi

Interactive PowerShell using WMI.

Invoke-PowerShellIcmp

An interactive PowerShell reverse shell over ICMP.

Invoke-JSRatRundll

An interactive PowerShell reverse shell over HTTP using rundll32.exe.

Invoke-JSRatRegsvr

An interactive PowerShell reverse shell over HTTP using regsvr32.exe.

Utility

Add-Exfiltration

Add data exfiltration capability to Gmail, Pastebin, a web server, and DNS to any script.

Add-Persistence

Add reboot persistence capability to a script.

Remove-Persistence

Remote persistence added by the Add-Persistence script.

Do-Exfiltration

Pipe (|) this to any script to exfiltrate the output.

Download

Transfer a file to the target.

Parse_Keys

Parse keys logged by the keylogger.

Invoke-Encode

Encode and compress a script or string.

Invoke-Decode

Decode and decompress a script or string from Invoke-Encode.

Start-CaptureServer

Run a web server which logs Basic authentication and SMB hashes.

ConvertTo-ROT13

Encode a string to ROT13 or decode a ROT13 string.

Out-DnsTxt

Generate DNS TXT records which could be used with other scripts.

[Base64ToString]

[StringToBase64]

[ExetoText]

[TexttoExe]

0x04 卸载系统补丁

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PS C:\Users\Rvn0xsy\Downloads\nishang-master> systeminfo

主机名:           DESKTOP-7KT7GL1
OS 名称:          Microsoft Windows 10 企业版
OS 版本:          10.0.15063 暂缺 Build 15063
OS 制造商:        Microsoft Corporation
OS 配置:          独立工作站
OS 构件类型:      Multiprocessor Free
注册的所有人:     Windows 用户
注册的组织:
产品 ID:          00329-00000-00003-AA343
初始安装日期:     2018/10/9, 22:03:48
系统启动时间:     2018/10/9, 22:03:27
系统制造商:       VMware, Inc.
系统型号:         VMware7,1
系统类型:         x64-based PC
处理器:           安装了 1 个处理器。
                  [01]: Intel64 Family 6 Model 158 Stepping 10 GenuineIntel ~259
BIOS 版本:        VMware, Inc. VMW71.00V.6997262.B64.1710270607, 2017/10/27
Windows 目录:     C:\Windows
系统目录:         C:\Windows\system32
启动设备:         \Device\HarddiskVolume1
系统区域设置:     zh-cn;中文(中国)
输入法区域设置:   zh-cn;中文(中国)
时区:             (UTC+08:00) 北京，重庆，香港特别行政区，乌鲁木齐
物理内存总量:     4,067 MB
可用的物理内存:   2,521 MB
虚拟内存: 最大值: 5,475 MB
虚拟内存: 可用:   4,035 MB
虚拟内存: 使用中: 1,440 MB
页面文件位置:     C:\pagefile.sys
域:               WORKGROUP
登录服务器:       \\WIN-HPD6618QKUJ
修补程序:         安装了 3 个修补程序。
                  [01]: KB4022405
                  [02]: KB4025376
                  [03]: KB4025342
网卡:             安装了 2 个 NIC。
                  [01]: Intel(R) 82574L Gigabit Network Connection
                      连接名:      Ethernet0
                      启用 DHCP:   是
                      DHCP 服务器: 192.168.117.254
                      IP 地址
                        [01]: 192.168.117.179
                        [02]: fe80::34d3:6c58:d461:cc5e
                  [02]: Bluetooth Device (Personal Area Network)
                      连接名:      蓝牙网络连接
                      状态:        媒体连接已中断
Hyper-V 要求:     已检测到虚拟机监控程序。将不显示 Hyper-V 所需的功能。
PS C:\Users\Rvn0xsy\Downloads\nishang-master> Remove-Update All
Removing update 4022405 from the target.
Waiting for update removal to finish ...
Removing update 4025376 from the target.
Waiting for update removal to finish ...
Removing update 4025342 from the target.
Waiting for update removal to finish ...

0x05 others

可以参考：https://github.com/samratashok/nishang/blob/master/README.md

Ref

• About Execution Policies