Wednesday, September 13, 2017 21 months ago London, UK
44CON are Information Security Conference & Training event taking place in London. Designed to provide something for the business and technical Information Security professional.
This talk details the use of MWR’s platform agnostic kernel fuzzing techniques to automatically identify critical flaws within Apple macOS.
This talk will focus on how the researchers approached developing fuzzing automation to test the core subsystems of the XNU kernel and the insights gained, and also highlight architectural differences between other supported platforms which had to be addressed during this work.
The old adage of ‘different fuzzers find different bugs’ will also be explored, as we looked into the effectiveness of using targeted fuzzing for specific components considered most likely to yield vulnerabilities.
An in-memory fuzzer based on a combination of static and dynamic analysis was also constructed to target these components with the aim to achieve greater code coverage, efficiency and to allow attacks on other privileged components within macOS via IPC.
Finally we will discuss the issues discovered by the fuzzers and highlight future improvements which could be made to the tooling going forward to increase coverage and effectiveness.
Various tools used during the research will be released after the talk.
One software product that red teamers will almost certainly find on any compromised workstation is Microsoft Office. This talk will discuss the ways that native functionality within Office can be abused to obtain persistence.
A wide range of techniques for abusing various add-in mechanisms will be covered. Each persistence mechanism will be discussed in terms of its relative advantages and disadvantages for red teamers. In particular, with regards to their complexity to deploy, privilege requirements, and applicability to Virtual Desktop Infrastructure (VDI) environments which hinder the use of many traditional persistence mechanisms.
The talk will finish with approaches to detection and prevention of these persistence mechanisms.
Elevated File Operations:
Getting UAC 0day (Pre RS2):
The workshop has intense hands-on labs where attendees will put the theory into practice. After attending you will immediately be able to apply this knowledge in the field. The next time someone tells you the default UAC settings are sufficient you will be able to set them straight!