Breaking into Libraries - DLL Hijacking Many of us have likely encountered DLL errors when trying to open Windows applications. If you were like my younger self, you might have naively downloaded a missing DLL from sites like dll-files.com and placed it in the application directory without giving it a second thought. This blog post will examine the risks associated with this approach. Dynamic Link Library (DLL) hijacking is a common occurrence that impacts Windows-based applications. This attack isn't new; Microsoft acknowledged it in an advisory back in 2010 (Dark Reading). It takes advantage of the way Windows loads DLL files, allowing malicious actors to inject harmful code into legitimate software processes. By manipulating the search order for DLL files, attackers can deceive an application into loading a malicious DLL, leading to unauthorised code execution, data theft, or even...
JUMPSEC LABS
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Active Cyber Defence – Taking back control
Every good cybersecurity article needs a Sun Tzu quote, here is one lesser known quote from Sun Tzu to start us off. What Happened? Recently, JUMPSEC’s Detection and...
NTLM Relaying – Making the Old New Again
I am old enough to remember that it was not always possible to get domain admin within the first hour of a test via Active Directory Certificate Services (ADCS) misconfigurations...
Building Forensic Expertise: A Two-Part Guide to Investigating a Malicious USB Device (Part 2)
In this part 2, we'll walk you through the step-by-step process of setting up and conducting a Digital Forensics and Incident Response (DFIR) investigation using a virtual machine (VM). We’ll cover everything from configuring the VM to ensure it’s completely isolated to tackling the challenges of USB passthrough with a write blocker. You'll also learn about the risks of using public threat...
Building Forensic Expertise: A Two-Part Guide to Investigating a Malicious USB Device (Part 1)
JUMPSEC believes heavily in learning and developing through real world experience. The incident described in this blog post presented a fantastic opportunity for 3 junior team members to learn first hand how to conduct, report and respond to an incident investigation. This blog post is split into two parts: Part I focuses on the prerequisites and preparation work done before kicking off the...
Adversary at the Door – Initial Access and what’s currently on the menu
Based on the data from the Cyber Security Breaches Survey 2024, phishing with malicious links or malware remains the most common initial access vector, followed by impersonation. The challenge with impersonation attacks is that current technology often struggles to accurately determine the purpose of a website. Although checks on domain maturity, reputation, categorization, and certificates are...
SSH Tunnelling to Punch Through Corporate Firewalls – Updated take on one of the oldest LOLBINs
In my formative days of learning network hacking, SSH tunnelling was amongst the first tunnelling techniques that I learnt. I still remember trying to repeatedly decode my notes and diagrams on the rather cumbersome syntax of single port forwarding with the -L and -R flags, which at the time was taught as “the way to do it”. If your foothold is (luckily) a Linux server, then you’re blessed with...
How to Handle Development Projects in a Pentest Company
If you are a pentester you probably never really think about programming. Instead you are testing what others have developed. However, every now and then a quick python or bash script is needed to exploit some stuff you have found, or automate a certain process you are using. Things become interesting when you are in a penetration testing company that has many strong penetration testers and...
How Cloud Migration is Affecting AppSec – A Red Teamer’s Perspective
Introduction I’ve recently spoken at several conferences about the changes that are underway within red teaming as a result of cloud migration. My team and I have been delivering majority cloud red team work over the last year and the differences are becoming more apparent by the day. One point I’ve mentioned as ‘controversial’ at several of these events is that cloud migration has actually made...
Putting the C2 in C2loudflare
tl;dr How to bring up an entire C2 infrastructure with all your tooling and their corresponding redirectors within 5 minutes with the help of Azure Snapshots, Cloudflare and Tmux Resurrect. Every so often I seem to stumble across various ideas, that when combined, massively improve my overall productivity at work. Most of these ideas on their own are nothing new, but when used in tandem can...
Bullet Proofing Your Email Gateway
In this labs post, I will introduce you to modern security controls that are currently used (but not always correctly) by the vast majority of enterprises, and hopefully by the end of this write-up, the topic will become a little clearer and the concepts will become easier to grasp. In today’s world of spammers, intruders, and fake emails, having a robust setup for your email deliveries is...
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