JUMPSEC LABS

The JUMPSEC Lab is a place where the technical team get creative and showcase their latest security research, publications, interesting news and general thoughts!  We love what we do and are passionate about security, with some great upcoming projects planned, bookmark our site and stick around to see what we are working on.

Breaking into Libraries – DLL Hijacking

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...

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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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What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 2)

In Part 1 of the series we looked at how an AWS Lambda-powered feature was exploited in a web app penetration test initially leading to RCE and further on with out-of-band data exfiltration via DNS. Though the exact mechanism of achieving remote-code execution with Python was not discussed, we went in depth in how to return data as a result of the code being executed. Initially, with...

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What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 1)

This is a war story of an AWS web application test where remote code execution was first obtained on the client's application. Then I needed to write my own DNS tunnelling 'protocol' to get the data out. Following a number of twists and turns I impersonated the application and attempted to laterally move within the AWS tenant. Before storytelling though, let's start with a public service...

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WASM Smuggling for Initial Access and W.A.L.K. Tool Release

TL;DR This blog post introduces Web Assembly (WASM) as a powerful alternative to traditional web technologies, highlighting its appeal to cybersecurity professionals for evading security measures for initial access. WASM has been observed being leveraged in the wild as a new payload delivery avenue which can land payloads in a hardened email inbox or instant messaging chats. A new tool, W.A.L.K....

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Adventures and Accidental Honeypots in Network Infrastructure: Unravelling Internet Shenanigans

Hello World! So, I've been tinkering with network stuff lately, trying to set up some infrastructure.Turns out that in the process, I made a rookie mistake and left a few ports open to the internet! A few months down the line I took a look and to no one’s surprise my server had been bombarded with all sorts of requests. It was receiving a steady stream of traffic, but not the good kind…think of...

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Poisoning Pipelines: Azure DevOps Edition

Introduction In the ever-evolving realm of cloud services, organisations are ditching the headaches of physical infrastructure management and diving headfirst into the possibilities of cloud platforms. From the humble beginnings of deploying virtual machines and servers, we now find ourselves in a dynamic space with everything from serverless architectures to cloud-based active directories,...

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Why sneak when you can walk through the front door – A Love letter to Password Spraying against M365 in Red Team Engagements

In 2023 through 2024, JUMPSEC's red team gained access to Microsft 365 (M365) environments of sophisticated clients during adversarial engagements with an approach that breathes life into the decades-old technique of password spraying. With threat actors increasingly using similar approaches in the wild, being able to compromise the even likes of Microsoft themselves, it is my opinion that red...

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Advisory CVE-2023-43042 – IBM Backup Products Superuser Information Disclosure

Software: IBM SAN Volume Controller, IBM Storwize, IBM FlashSystem and IBM Storage Virtualize products Affected versions: 8.3 Vendor page: https://www.ibm.com/support/pages/node/7064976 CVE Reference: CVE-2023-43042 Published: 08/12/2023 CVSS 3.0 Score: 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector: Network Credit: Max Corbridge Summary JUMPSEC’s Head of Adversarial Simulation...

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