Windows Kernel Exploitation : Advanced

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Windows Kernel Exploitation Advanced

 

Duration: 2 Days

Description:

  • This training is the advanced version of Windows Kernel Exploitation Foundation course. In this course we will use Windows 10 RS2 x64 for all the labs. This course starts with the changes in Windows 10 RS2, hands-on fuzzing of Windows kernel mode driver (different driver than one used in Foundation course).
  • We will understand Pool Internals in order to groom pool memory from user mode for reliable exploitation of pool based vulnerabilities.
  • We will look into how we can bypass KASLR using kernel pointer leaks. We will do hands-on exploitation using Data-Only attack which effectively bypasses SMEP and other exploit mitigation.

This training assumes that the attendees have either taken “Foundation course” or have basic understanding of operating system concepts, familiar with software debugging, and knowledge about exploitation of vulnerabilities in user mode.

Upon completion of this training, participants will be able to:

  • Understand how to fuzz Windows kernel mode drivers to find vulnerabilities
  • Learn the exploit development process in kernel mode
  • Understand how to groom kernel pool from user land
  • Get comfortable with Windows kernel debugging

Day 1

  • Windows 10
    • Architecture
  •  Fuzzing Windows Drivers (Hands-On)
    • Locating IOCTLs in Windows Drivers
    • Locating input entry points
    • Writing scripts to fuzz the discovered IOCTLs
  • Exploit Mitigations
    • Kernel Address Space Layout Randomization (kASLR)
      • Understanding kASLR
      • Breaking kASLR using kernel pointer leaks
    • Supervisor Mode Execution Prevention (SMEP)
      • SMEP concepts
      • Breaking/bypassing SMEP
  • Pool
    • Internals
    • Tracing object allocations
    • Feng-Shui (Lookaside List & ListHeads List)
  • Exploitation (Hands-On)
    • Pool Overflow Exploitation (Data-only attack bypassing exploit mitigation)

Day 2

  • Quick Revision
    • kASLR
    • SMEP
    • Feng Shui
  •  Exploitation CTF
    • Pool Overflow
    • Achieving arbitrary read/write primitive (Data-only attack)
    • Gaining local privilege escalation
  • Different places to corrupt
  • Miscellaneous
    • Assignment to write a blog post about the vulnerability exploited during CTF
    • Q/A and Feedback

Who should attend?

  • Windows Kernel Exploitation Foundation attendees
  • Bug Hunters & Read Teamers
  • User Mode Exploit Developers
  • Windows Driver Developers & Testers
  • Anyone with an interest in understanding Windows Kernel exploitation
  • Ethical Hackers and Penetration Testers looking to upgrade their skill-set to the kernel level

Why attend? Upon completion of this training, participants will be able to:

  • Understand exploitation techniques to defeat mitigation like SMEP
  • Understand how Windows Pool Allocator works in order to write reliable exploit for complex bugs like Pool Overflow(s) and Use after Free(s)
  • Learn to write own exploits for the found vulnerabilities in Kernel or Kernel mode drivers

Prerequisites

  • Basic operating system concepts
  • Good understanding of user mode exploitation
  • Basics of x86 Assembly and C/Python
  • Patience

Hardware & Software Requirement

  • 8 GB Flash drive
  • A laptop capable of running two virtual machines simultaneously (8 GB of RAM)
  • 40 GB free hard drive space
  • Everyone should have Administrator privilege on their laptop

What to Expect?

  • Hands-on
  • WinDbg-Fu
  • Fast & Quick Overview of Windows Internals
  • Windows Kernel Drivers Basics/IOCTL/IRP
  • Techniques to exploit Windows Kernel/Driver vulnerabilities

What students will be provided with?

  • Printed Lab Manual
  • Training slides
  • Scripts and code samples
  • BSOD T-Shirt

Trainer:

Ashfaq Ansari

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