Computers

SAIL-2025

Solving the Openfire Lab Blue team challenge

As a cybersecurity analyst, you are tasked with investigating a data breach targeting your organization’s Openfire messaging server.
Attackers have exploited a vulnerability in the server, compromising sensitive communications and potentially exposing critical data.

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ShadowCitadel cover

Solving the ShadowCitadel Lab Blue team challenge 🫆

Today, we dive into a host-based forensics investigation − a curious case of a breach inside the enterprise environment of a company called TechSynergy.
They have detected an anomaly after an employee engaged with an unexpected email attachment. This triggered a series of covert operations within the network, including unusual account activity and system alterations.

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Sophisticado

How to prevent token misuse in LLM integrations

LLMs are powerful. And expensive. Every token counts, and if you’re building something that uses an LLM API (Claude, OpenAI, Gemini or PaLM, Mistral, etc.), malicious users can abuse it to burn through your credits. This is especially true for apps that take user input and feed it to the model. The trick is that […]

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Bars in Dublin at dusk

Solving the XLMRat Blue team challenge

Today we’re looking at the XLMRat malware. It is a remote access trojan (hence the RAT part) built to be small, sneaky, and stupidly persistent. It typically rides in via phishing or social engineering, often disguised as something mundane, like a JPG or TXT file. It targets Windows systems and speaks fluent PowerShell. It’s popular […]

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Notebook

Billion-dollar brains: the real cost of AI

AI-assisted coding feels like magic. You type what you want, and out comes working code. (well, maybe after a few hours of setup − but still) Like all magic, though, it has a cost. And right now, that cost is mostly hidden − even as the invoices show up every month. What makes it work […]

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Blue sky with a blue plane

Solving the BlueSky Ransomware Blue team challenge

Today we’re looking at the BlueSky ransomware, a strain of malicious software that encrypts files on a victim’s system, rendering them inaccessible until a ransom is paid. First detected in June 2022, it shares similarities with other notorious ransomware families like Conti and Babuk.  BlueSky spreads through methods such as phishing emails, malicious links, and network […]

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DanaBot obfuscated JS file

Solving the DanaBot Blue team challenge

In this blog post, we’ll walk through a Blue Team lab challenge hosted by CyberDefenders, specifically investigating a breach scenario involving DanaBot malware. The challenge is presented by CyberDefenders (https://cyberdefenders.org) and can be found here: https://cyberdefenders.org/blueteam-ctf-challenges/danabot. Note: This post is not sponsored by or affiliated with CyberDefenders. Initially, I knew very little about DanaBot. Turns out […]

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The unboring NIST SP 800-190

When most of us hear “NIST guidelines”, our first reaction might be “another boring PDF I’ll never open again“. My first encounter with NIST Special Publication 800-190 happened when I was studying for the GIAC GCSA exam, which is focused on DevSecOps and container security. The SP 800-190 is refreshingly different. It isn’t just another […]

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