Tag: pentesting

Defense

Penetration Testing

Overview

Penetration testing is the activity of conducting security testing with the aim of identifying and exploiting vulnerabilities to identify strengths and weaknesses. I include strengths because I believe it’s important for security testing to promote both positive and negative findings. I also think that there is a huge mis conception with what penetration is, what it helps with and how to best get value from a penetration test.

My definition isn’t too far from the NCSC one: https://www.ncsc.gov.uk/information/check-penetration-testing

A penetration test is a security assurance activity, but it’s one of many activities that I recommend people conduct. This is however largely only adopted by the few, for many a penetration test is a compliance tick box, either from a regulatory or contractual requirement.

When looking at a system a penetration test is not usually the most efficient starting point, especially if it’s from a black box perspective. Read more “Penetration Testing”

PetitPotam Guides

From Zero to DA using ‘PetitPotam’

Introduction

Whilst I was on ‘holiday’ (seriously even when on holiday I almost always must do some work!) a few Windows vulnerabilities were published. Great work by Gilles Lionel, Benjamin Delpy and many many others!

Lab Setup

  • A Domain Controller
  • A Separate ADCS Install with Web Enrolment or two DCs one with ADCS installed.
  • A windows Client Device (non-domain joined)
  • An attacker device (I used Kali)

You do not need any domain credentials to conduct this exploit chain, so from a network adjacent unauthenticated position you can get DA with the right circumstances (default configuration). Read more “From Zero to DA using ‘PetitPotam’”

CTF

Server Message Block (SMB) Enumeration, Attack and Defence

Introduction

If you see a service with TCP port 445 open, then it is probably running SMB. SMB is used for file sharing services. You will also see it related to other protocols in its operation:

https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smb2/06451bf2-578a-4b9d-94c0-8ce531bf14c4

Checklist

Here is a check list of common things to check:

  • Can you enumerate the server version?
  • Can you enumerate shares?
  • What versions of the protocol are enabled?
  • Can you connect using anon bind?
  • Are there any known vulnerabilities?
  • Can you enumerate usernames?
  • Is SMB signing enabled?
  • Are there other hosts in the subnet that can be used?

Read more “Server Message Block (SMB) Enumeration, Attack and Defence”

Guides

Becoming a Cyber Criminal (Pro) – Basic External Attacks

This is an experiment to combine a near real time thread on twitter and a blog… I have no idea if this will work. The premise is, we are conducting a adversary simulation against a target and want to see how this translates into a ‘plain language’ blog/story about how these things work. (I’ve also not included sales/scoping/documentaiton and clearly not all of this is in real time) but it is real!

The Fundamental Steps

Ok so first thing is first – the criminal part is a joke! We are here to help people. What we are going to do however is consider the general cyber threat landscape, look at the organisation from an ‘external threat actor’ perspective and then see what we can map out from an attack surface point of view.

Read more “Becoming a Cyber Criminal (Pro) – Basic External Attacks”
Defense

Understanding Penetration Testing Scopes

“Can I have a penetration test please” is about in line with saying “Can I have a car please?”. Why am I writing a blog about this? Well, where do I start, so I have been working on the technology world basically all my career and over the last 20 odd years one area of digital security management that I think a lot of organisations and people struggle with is understanding just what a penetration test is, how it should be used, how long they can take and what is involved. Read more “Understanding Penetration Testing Scopes”

Defense

Everything must be agile but is that really always…

A lot of people talk about AGILE but the normally mean ‘agile’ however when it comes to security testing and penetration testing (to me there is most certainly a difference) we need to be mindful of the different approaches, so we select the right one for the context, scenario, and objectives.

In this post we take a brief look at what we recommend for a range of scenarios and we look at the key differences and what some constraints might mean when it comes to approach selection.

Read more “Everything must be agile but is that really always the best way?”
CTF

Try Hack Me: Part 5 – Game Zone

Getting my agent on!

Today we look at a vulnerable web application room based upon the Hitman series!

https://tryhackme.com/room/gamezone

This is a fun room where we see an old but common vulnerability in untrusted user input lead to sensitive information disclosure (hashed credentials) which results in a threat actor gaining initial access. From here we then discover there is a weak security configuration (in effective network segmentation) and a vulnerable unpatched service. This chain leads to total system compromise. Read more “Try Hack Me: Part 5 – Game Zone”