Building SMTP server in AWS

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After building out a fairly transparent home network, I found myself needing to receive IDS and SIEM alerts so I could respond to events quicker.  AWS is reliable and fairly cheap, so that is the platform I chose to build out my SMTP server.  This guide will only show how to stand up a system …

Hide Messages With Ulterior

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While working on a CTF a couple of weeks ago I ran across a challenge that required inspecting a web app. The page had one line of visible text, however the source showed many repeating patterns of characters(‌​) Say “Hello” to zero-width characters. These characters are called non-printing characters so they are not visible while …