Lenny Zeltser
Fellow
Specialities
Digital Forensics and Incident Response

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Aptly called the "Yoda" of malware analysis by his students, Lenny Zeltser keeps his eye on the big picture and focuses on the sum of events rather than individual occurrences. He lives by that philosophy and brings it to his job and classroom. "Even those professional moments that seem insignificant by themselves can be an important piece of the progressive journey that, hopefully, takes us toward our career objectives and honors our ideals," says Lenny. "And you may not even see the value in those moments until you look back on the path."
A cybersecurity executive with deep technical roots, product management experience, and a business mindset, he has built security products and programs from early stage to enterprise scale.
Lenny is also a Fellow Instructor at SANS and the primary author of FOR610: Reverse-Engineering Malware: Malware Analysis Tools and Techniques, a course he designed as an on-ramp into the malware analysis field. FOR610 helps students expand and systematize their approaches to examining malicious software using a variety of techniques. He is also the author of the SEC402: Cybersecurity Writing: Hack the Reader, a course designed exclusively for cybersecurity professionals, that teaches the key topics to address in security reports and other written communications and how to pick the best words, structure, look, and tone.
"My goal is to make this topic as accessible to people as possible," says Lenny. "There is indeed much one needs to know to understand the inner workings of malicious code, but the good news is that people can begin learning how to do this work by building on the technical skills they already have, whether they are grounded in system administration, network security, software development or other aspects of IT."
Like many of his students, Lenny's career path began in an IT role, which lends unique strengths to his information security expertise.
"My first job in IT was Unix system administration, then I moved onto Windows sysadmin, and then I spent a bit of time on software development," Lenny explains. "I found myself gravitating toward the information security aspects of these jobs. For me, Infosec exists at the intersection of many disciplines, and working in this field allows me to make use of the skills and interests I've acquired across various aspects of IT."
Along the way, Lenny earned the prestigious GIAC Security Expert professional designation, and also holds a bachelor's degree in computer science from the University of Pennsylvania and a master's in business administration from MIT Sloan.
A co-author of four books on malware, network security, and digital forensics, Lenny also developed the Linux toolkit REMnux to make it easier to use a variety of freely available malware analysis tools, many of which run well on Linux but can be difficult to find and install. REMnux has grown to become a very popular toolkit and today is used by malware analysts throughout the world. The FOR610 course that Lenny teaches covers many of the tools installed on REMnux.
Lenny gives his students more than technical tools, however, and he says that the most important lesson he teaches his students is: "You can do it."
"It's easy to get discouraged when you run into professional challenges that you're not equipped to handle," Lenny explains. "But when you participate in SANS training, you encounter many new tools and concepts that you will be able to attach to the techniques you already know from prior experience in the field. Much of what you learn will occur after you finish the course and begin applying the concepts to your work outside the classroom. I strive to give students the confidence and the core skills they need to keep learning about and curtailing malware threats even after the class ends."
In his free time, Lenny indulges his love of food both as chef and consumer. "Eating a delicious meal in good company is always time well spent for me," he says. Lenny also loves to cook as a way to clear his mind, disconnect from the day-to-day challenges of business and IT, and connect with family and friends. Lenny subscribes to several food and cooking magazines and enjoys experimenting with new recipes, ingredients, and spices. "Not everything I cook turns into a great dish—sometimes experiments lead towards unfavorable results—so I keep reminding myself to think about this process as a journey, not as a destination."
FOR610 was the best course I've taken from SANS. It was demanding but engaging, and Lenny Zeltser is the best. I would sign up for anything he is teaching. I'm looking forward to taking what I've learned with me to work.
Lenny Zeltser has put great work into making [FOR610] challenging yet accessible, and he is extremely knowledgeable and good at communicating that knowledge to students. Labs are also really well done, and the lab book plus the live demo walk us through them perfectly.
SEC402 covers a very relevant topic, and Lenny Zeltser has not only mastered this topic but also enjoys it. I'm thrilled that there is a writing course specifically for cybersecurity.
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Explore content featuring this instructor’s insights and expertise.
As the world of information technology continues to change, so does the role of the security leader. Whether you're a CISO, Director of Security, or someone aspiring for such a position, you should consider how the current trends in IT and business affect your professional journey.

情報技術が変化し続ける中、セキュリティ・リーダーの役割も変化し続けています。CISOであれ、セキュリティ担当ディレクターであれ、あるいはそのような役職を目指している人であれ、ITとビジネスにおける現在のトレンドが、ご自身のキャリアにどのような影響を与えるかを考える必要があります。経験豊富なCISOがどのような取り組みをすることで、セキュリティリーダーとしてチームを成功に導くポイントを紹介します。

As the world of information technology continues to change, so does the role of the security leader. Whether you're a CISO, Director of Security, or someone aspiring for such a position, you should consider how the current trends in IT and business affect your professional journey.

Join Lenny Zeltser, a Faculty Fellow at SANS Institute, to learn how to excel in the field of malware analysis. This webcast is designed for aspiring analysts, incident responders, and general cybersecurity professionals wondering about the process of examining malicious software. Lenny will break down the key stages of the malware analysis process, helping you identify your current capabilities and chart a path forward.

SANS Institute のFaculty Fellowである Lenny Zeltser と一緒に、マルウェア解析の分野で卓越する方法を学びましょう。このWebcastは、アナリストになりたい方、インシデント対応担当者、および悪意のあるソフトウェアを調査するプロセスについて疑問を抱いている一般的なサイバーセキュリティ専門家を対象としています。Lennyは、マルウェア解析プロセスの主要な段階を説明し、現在の能力を確認し、前進するための道筋を描くお手伝いをします。

情報技術の世界が変化し続ける中、セキュリティリーダーの役割も変化しています。CISOやセキュリティに関する管理職、またはそのようなキャリアを目指している方にとって、ITとビジネスの現在のトレンドがキャリアパスにどのような影響を与えるかを考える必要があります。

SANS Community Nights are a great way to stay in touch with your local InfoSec community and to hear the latest in technical wizardry, industry intelligence, and thought leadership from our amazing instructors.

Review relevant educational resources made with contribution from this instructor.