cybercrime – PwnDefend

Microsoft Outlook Elevation of Privilege Vulnerability (CVE-2023-23397)

Regarding: CVE-2023-23397

This is a fast publish, use at own risk.

See guidance from Microsoft: CVE-2023-23397 – Security Update Guide – Microsoft – Microsoft Outlook Elevation of Privilege Vulnerability

If you need to mitigate the latest Outlook vulnerability which abuses an SMB/WebDav call using the Calendar invite feature you can consider the following:

Education

The Long Game: Persistent Hash Theft

CVE-2023-23397 enables a threat actor to send a calendar invite whereby the properties of the msg file can include a path for the reminder sound file. This is achieved by setting:

Leadership

Adopting an Attacker Mindset to Defend Healthcare

This post started as a reply to a great topic on LinkedIn, but I hit the character limit so now it’s a blog post!

Years ago I simulated attacks (authorized obviously for the people that have wild imaginations) on a customer which included a physical attack where I walked into a healthcare organization, armed with a suit a smile (and a USB key) I needed to gain access and attempt to move laterally and escalate privileges.

Fiction

Caught: A Hacker Adventure

It was a dark and stormy night, and a lone figure sat hunched over their computer screen, typing away at lightning speed. This was no ordinary person – this was a hacker, one of the most skilled and dangerous in the world.

Hacking

Active Directory Security Cheat Sheet

Ok you need to do some AD Security Auditing or Security Testing/Exploitation, great. Let’s look at some of the common misconfigurations and some tools to help you, a list of things will obviously not be the answer, you will need a method and process to go through from recon/enumeration through to exploitation and impact (effects), but that’s what google is for (and CTFs/Labs)! This post is just me jotting down some notes, hopefully they help defenders think about improving their posture.

Guides

Cyber Threat Intelligence Resources

There are so many lists of “tools” of “free resources” for “cyber” etc. Well I don’t want to make a list of stuff for social media, this isn’t the TOP x tools, this is simply some resources that I use on a regular basis that should give people a fairly good idea of where to start looking. Cyber sleuthing is a mixture of:

HUMINT
OSINT
CSINT
RUMINT
SIGINT
SOCMINT

Threat Intel

The RoyalMail Ransomware Saga

Last update we had was when LockBit released a transcript of a chat alleged to be between LockBit and the RoyalMail ransomware negotiator.

Thanks to Domonic far tagging me, we can see an update has occurred on the LB site:

Education

Am I a criminal or am I a cybersecurity…

Whilst the common person will largely link the words “hacker/hackers” to criminal the reality is hackers are scientists/artists/creators/ComputerOperators and the choice of being a criminal or not is down to actions and consequences. So the debate about if you identify as “hacker” does that make you a criminal, well it’s nonsense isn’t it. I could call myself a pony but it won’t make me one, much like I could call myself a criminal and I could be entirely law abiding.

Vulnerabilities

CVE-2022-39952 Fortinet Global Exposure

There appears to be a new RCE out for Fortinet devices as per this post (it’s against FortiNAC as far I am aware so this is probably a much smaller exposure footprint than all fortinet devices):

https://www.fortiguard.com/psirt/FG-IR-22-300

There’s also this in FortiWeb (and well they released 40 odd fixes to various bits)

https://www.fortiguard.com/psirt/FG-IR-21-186

When we consider security edge devices and the risks these may pose to organizations and society as a whole it’s important to understand that these are no trivial matter. These are “security” appliances that are there to protect your organizations, to provide remote access as well as protect network egress etc.

Fortinet are not the only vendor to suffer from these types of vulnerability (Remote Code Execution – RCE) however there do appear to have been quite a few of these when looking historically.

Threat Intel

Pro Russian Hacktivist Groups

Cyberwarfare in Ukraine was hyped as a MASSIVE thing, yet largely it’s been more bark and bite, but perhaps people need to understand that you can’t just “CYBER” a remote network, and even if you could, let’s say you get RCE on 30 networks in a country, so what? There needs to be value, purpose and something that will support other objectives, this isn’t a CTF.

Espionage (Collection/CNE)
Information Warfare (PsyOps)
Computer Network Attacks/Operations (CNA/CNO)