WSL or “Windows Subsystem Linux”[1] is a feature in the Microsoft Windows ecosystem that allows users to run a real Linux environment directly inside Windows without needing a traditional virtual machine or dual boot setup. The latest version, WSL2, runs a lightweight virtualized Linux kernel for better compatibility and performance, making it especially useful for development, DevOps, and cybersecurity workflows where Linux tooling is essential but Windows remains the primary operating system. It was introduced a few years ago (2016) as part of Windows 10.

For a few days, many phishing emails that landed into my mailbox contain strange URLs. They are classic emails asking you to open a document, verify your pending emails, …

Last week, a new AI agent framework was introduced to automate "live". It targets office work in particular, focusing on messaging and interacting with systems. The tool has gone viral not so much because of its features, which are similar to those of other agent frameworks, but because of a stream of security oversights in its design.

Based on the sensors reporting to ISC, this activity started on the 13 Jan 2026. My own sensor started seeing the first scan on the 21 Jan 2026 with limited probes. So far, this activity has been limited to a few scans based on the reports available in ISC [5] (select Match Partial URL and Draw):

The title of this diary is perhaps a bit catchy but the question is important. I don’t consider myself as a good developer. That’s not my day job and I’m writing code to improve my daily tasks. I like to say “I’m writing sh*ty code! It works for me, no warranty that it will for for you”. Today, most of my code (the skeleton of the program) is generated by AI, probably like most of you.

[This is a Guest Diary by Matthew Presnal, an ISC intern as part of the SANS.edu BACS program]

Introduction

Today, Microsoft released patches for 113 vulnerabilities. One of these vulnerabilities affected the Edge browser and was patched upstream by Chromium.

Reverse engineers must have a good understanding of the environment where malware are executed (read: the operating system). In a previous diary, I talked about malicious code that could be executed when loading a DLL[1]. Today, I’ll show you how a malware can hide suspicious information related to created processes.

I'm always looking for new ways of manipulating the data captured by my DShield sensor [1]. This time I used Gephi [2] and Graphiz [3] a popular and powerful tool for visualizing and exploring relationships between nodes, to examine the relationship between the source IP, filename and which sensor got a copy of the file. I queried the past 30 days of data stored in my ELK [4] database in Kibana using ES|QL [5][6] to query and export the data and import the result into Gephi.