Guides
Ever stuck in an environment where your internet access isn’t what you want it to be? Ever need to exfilrate data and bypass some DLP? Obviously I’m talking like a pentester (don’t use this if it beaks policies on anohers assets) so this is useful for some scenarios in testing but also in real life!
Read more “How to use Putty as a SOCKS Proxy”
Leadership
Defending a single server is often far more complex than people apreciate, defending a single organisation is significantly harder than a single server, defending a country… a much more complex challenge than I think people actually realise.
According to the NCSC:
The aim of ACD is to “Protect the majority of people in the UK from the majority of the harm caused by the majority of the cyber attacks the majority of the time.” We do this through a wide range of mechanisms, which at their core have the ability to provide protection at scale.
ACD is intended to tackle the high-volume commodity attacks that affect people’s everyday lives, rather than the highly sophisticated and targeted attacks, which NCSC deal with in other ways.
UK NCSC
The UK NCSC offer and run a range of Active Cyber Defence capabilities which include the following:
Read more “UK NCSC Active Cyber Defence (ACD)”
Defence
Working out what exploits to care about is a tough job, kill chains, availability of exploits, complexity, data flows, controls etc. all play a part in understanding a vulnerability and how it affects your organisational risk. To support this effort I’ve started to compile a list of public exploits against CISA Known Exploited Vulnerabilities (KEV). This may be useful for defensive and offensive security pros.
Read more “Offensive KEV Alpha 0.1”
Education
The swiss army knife of the cyber world, it can port scan, fingerprint, produce reports and run scripts using the nmap scripting engine (NSE).
Why do we care about NMAP, surely everyone knows how to NMAP?
Well, that’s simply not true, it’s always important to tech new people, to revise and hone existing skills and the world of nmap scripting is constantly evolving.
Port scanning and fingerprinting let alone leaking sensitive data and conducting “attacks” is all possible. You can do a basic vulnerability scan with nmap alone!
Read more “Nmap & CrackMapExec (CME)”
CTF
Pwning a legacy server on Hack the Box is good for a training exercise however what about if we want to think about how to use resrouces for red and blue. Looking at both sides of the coin when thinking about offense really should help people undesrand how to defend better. In the end of the day outside of a tiny tiny fraction of deployment types, you are going to need to be able to explain how to defend regardless of engagement type (vulnerability assessment, penetration test, purple team, red team etc.)
I’m not going to talk through every step but here’s the commands you would need to run:
Read more “Using CTFs for offensive and defensive training – Purple Teaming”
Hacking
I haven’t had tea but I was thinking about the MAC i was remoting into and I suddenly thought.. I wonder how to crack the hashes from a MAC. Surely it’s just cat /etc/passwd and cat /etc/shadow and then unshadow and run hashcat right?
WRONG!
The hashes for local users are stored here:
Read more “Hash Cracking for Modern OS X (10.8+)”
Hacking
When you gain access to a target node you will want to explore, the exact method you use to do this will depend upon operational security considerations, time constraints and style. You will be looking for a range of elements to support progressing an objective.
It should be noted that the objective may NOT require elevation. You may be trying to obtain data and access might already be possible using the context you have assumed.
You also may need to move from a www-data user to a named user account or get to root level of access. If so there’s a range of questions we should be asking ourselves:
Read more “Linux Privilege Escalation”
Threat Intel
When running honeypots you never have to wait too long for something to drop!
This moring we had a new hit in the pot, so I decided to invesigate but also to blog and show how we could go about investigating the logs and paylods etc.
Read more “Learn to SOC: Java Webshell via confluence”
Guides
Have you ever tried to SSH into a server and revieved the following error?
Well that’s probably becuase you are using a bit of kit with legacy software or firmware.
Then when you try to SSH and you add diffie-hellman-group1-sh1 you get the following back?
Read more “SSH oh MY: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1”
Guides
Have you ever wanted to run a quick test of egress ports from userland from a windows machine?
Well worry not, I didn’t even have to write anything, the nice people at Black Hills security have done it for us. However I did decide that there’s a few other things we might want to do, so I made a quick modification, now we have colours, randomisation and some sleeps.
Read more “Testing Risky Egress Ports”