Writing Regular Expressions (Regex) is a versatile skill set to have across the IT landscape. Regex has a number of information security related uses and applications. We are going to provide an overview and show examples of writing Regex for pattern matching and file content analysis using sample threat feed data in this presentation. Along with a healthy dose of motherly advice, we cover Regex syntax, character classes, capture groups, and sub-capture groups. Whether Regex is something completely new or worth brushing up on, this talk is geared toward you.