PowerShell for Penetration Testers presented at DeepSec 2015

by Nikhil Mittal,

Summary : Overview
PowerShell has changed the way Windows networks are attacked. It is Microsoft’s shell and scripting language, available by default in all modern Windows computers. It can interact with .Net, WMI, COM, Windows API, Registry and other computers on a Windows network. This makes it imperative for Penetration Testers and Red Teamers to learn PowerShell.
This training is aimed towards attacking Windows network by using PowerShell and is based on real world penetration tests done by the instructor. The course runs as a penetration test of a secure environment with detailed discussion and use of custom PowerShell scripts in each phase. Some of the techniques used in the course:
- In-memory shellcode execution using PowerShell from a Word macro.
- Exploiting SQL Servers (more than executing commands)
- Using Metasploit shellcode with no detection
- Active Directory trust mapping and abuse.
- Dump Windows passwords, Web passwords, Wireless keys, LSA Secrets and other system secrets in plain text
- Using DNS, HTTPS, Gmail etc. as communication channels for shell access and exfiltration.
- Network relays, port forwarding and pivots to other machines.
- Reboot and Event persistence
- Bypass security controls like Firewalls, HIPS and Anti-Virus.
The course is a mixture of demonstrations, exercises, hands-on and lecture. It has a live CTF which attendees can try while and after the training.
After this training the attendees will be able to write own scripts and customize existing ones for security testing.It aims to change how you test a Windows based environment.
Course Content
- Introduction to PowerShell
- Language Essentials
- Using ISE
- Help system
- Syntax of cmdlets and other commands
- Variables, Operators, Types, Output Formatting
- Conditional and Loop Statements
- Functions
- Modules
- PowerShell Remoting and Jobs
- Writing simple PowerShell scripts
- Extending PowerShell with .Net
- WMI with PowerShell
- Playing with the Windows Registry
- COM Objects with PowerShell
- Recon, Information Gathering and the like
- Vulnerability Scanning and Analysis
- Exploitation – Getting a foothold
- Exploiting MSSQL Servers
- Client Side Attacks with PowerShell
- PowerShell with Human Interface Devices
- Writing shells in PowerShell
- Using Metasploit and PowerShell together
- Porting Exploits to PowerShell
- Post-Exploitation – What PowerShell is actually made for
- Enumeration and Information Gathering
- Privilege Escalation
- Dumping System and Domain Secrets
- Backdoors
- Pivoting to other machines
- Poshing the hashes™
- Replaying credentials
- Network Relays and Port Forwarding
- Achieving Persistence
- Clearing Tracks
- Quick System Audits with PowerShell
- Detecting PowerShell attacks
- Security controls available with PowerShell
What's in it for you?
1. PowerShell Hacker’s Cheat Sheet, access to the online CTF, solutions to exercises, sample source code, updated tools and extra slides explaining things which could not be covered.
2. Attendees will learn a powerful attack method which can be applied from day one after the training.
3. They'll understand that it is not always required to use a third party tool or non-native code on the target machine for post exploitation.
4. And learn how PowerShell makes things easier than previous scripting options on Windows like VB.
Prerequisites
1. Basic understanding of how penetration test are done.
2. Basic understanding of a programming or scripting language could be helpful but is not mandatory.
3. An open mind.
System Requirements
Windows 7 or later system, with administrative access and ability to run PowerShell scripts.