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Threat Detection Engineer Intern

It's fun to work in a company where people truly BELIEVE in what they're doing!

We're committed to bringing passion and customer focus to the business.

The Role:

This intern role is responsible for aiding in creating detection rules for our Emerging Threats Pro IDS feed product and static detections for threats in email. You'll learn from seasoned threat detection engineers to write network signatures for our IDS and email defense customers – all to detect malware and credential phishing threats.

As an intern on the Emerging Threats team, you will perform dynamic malware analysis and spend time searching through forensic data to facilitate signature creation, analyze threats, and then make that information meaningful to our customers. You’ll be a part of a team of dynamic and creative threat researchers focused on finding malware, understanding how it works, and using that knowledge to augment our products.

Your day-to-day:

  • Write intrusion detection rules for the Snort and Suricata platform
  • Write ClamAV rules for internal static processing
  • Answer support questions about rule guidance and false positives
  • Work with the open-source community to maintain and optimize the ETOpen ruleset
  • Research new and past threats, including malware, exploit kits, and vulnerabilities.
  • Help maintain the existing expansive ETPRO ruleset through performance tuning and pruning irrelevant rules when necessary

What you bring to the team:

  • Experience with network traffic inspection tools, such as Wireshark, tcpdump, Arkime, and Zeek.
  • Knowing of PKE & encryption algorithm standards & practices
  • Experience with Malware Analysis and Investigation
  • Familiarity with writing signatures for the Snort or Suricata IDS platforms.
  • Experience with yara rules
  • Experience with ClamAV signature creation
  • An interest in the cyber-threat landscape
  • Familiarity with virtualization technologies, such as VMware products, VirtualBox, KVM, etc.
  • Experience with one or more scripting languages. Lua or Python proficiency preferred.
  • Experience analyzing and interpreting host, network, and memory artifacts from sandbox environments.
  • Experience with PCRE.
  • Excellent verbal and written communication skills
  • Creativity, enthusiasm for the malware space, and willingness to collaborate with the team
  • Must be able to work independently

Candidate Profile:

You have the ability and interest in working remote full-time (a maximum of 38 hours/week) this summer and part-time (a maximum of 20 hours/week) for 9 months afterward. You are currently pursuing an undergraduate degree with a strong academic record. This internship is scheduled to begin in Summer 2025 and continue through 2026 (1-year program).

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

What You Should Know About Threat Detection Engineer Intern, Proofpoint

Join our dynamic team at the forefront of cybersecurity as a Threat Detection Engineer Intern! Based in sunny California, this role is all about diving deep into the ever-evolving world of malware and cyber threats. At our company, we truly believe in fostering passion and customer focus, and this internship is no exception. You'll collaborate with experienced threat detection engineers to develop detection rules for our Emerging Threats Pro IDS feed. This will involve crafting network signatures that help our clients detect malware and phishing threats effectively. As an intern, you'll gain hands-on experience performing dynamic malware analysis, digging through forensic data, and creating meaningful signatures to enhance our products. Your day-to-day work will include writing intrusion detection rules for the Snort and Suricata platforms, creating ClamAV rules, answering support questions about detection rules, and optimizing our expansive ETPRO ruleset. You won’t just be a spectator; you’ll actively engage in researching new threats and vulnerabilities while maintaining a passion for the cyber-threat landscape. If you love the idea of working in an environment that values creativity and collaboration, and you want to develop skills in writing signatures, traffic inspection, and analyzing artifacts, this internship is perfect for you. Plus, the flexibility to work remotely full-time this summer and part-time afterward allows you to balance your academic pursuits while gaining valuable professional experience. If you're ready for wild growth and the thrill of working with enthusiastic over-achievers, we can't wait to see you grow with us!

Frequently Asked Questions (FAQs) for Threat Detection Engineer Intern Role at Proofpoint
What are the main responsibilities of a Threat Detection Engineer Intern at your company?

As a Threat Detection Engineer Intern, your main responsibilities will include writing intrusion detection rules for platforms like Snort and Suricata, crafting ClamAV rules for static processing, and engaging in dynamic malware analysis. You'll also research emerging and historical threats, maintain the ETPRO ruleset, and assist with rule guidance support, all contributions that help enhance our cybersecurity offerings.

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What qualifications do I need to apply for the Threat Detection Engineer Intern position?

To apply for the Threat Detection Engineer Intern position, candidates should be pursuing an undergraduate degree with a strong academic record. Additionally, familiarity with network traffic inspection tools, experience with malware analysis, and scripting proficiency in languages like Python or Lua can significantly bolster your application.

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Is there flexibility in terms of working hours for the Threat Detection Engineer Intern role?

Yes, the Threat Detection Engineer Intern role offers flexibility! Interns can work full-time (up to 38 hours per week) during the summer and transition to part-time (up to 20 hours per week) for nine months thereafter, making it easier to balance work with academic commitments.

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What skills will I gain as a Threat Detection Engineer Intern?

During your internship as a Threat Detection Engineer, you'll develop critical skills in malware analysis, intrusion detection rule writing, and traffic inspection tools. You'll also enhance your ability to research threats and vulnerabilities, work collaboratively with an experienced team, and contribute to open-source projects, all of which are invaluable assets in the cybersecurity field.

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What is the timeline for the Threat Detection Engineer Intern position?

The Threat Detection Engineer Intern position is set to begin in the summer of 2025 and will continue through 2026, allowing you to immerse yourself in real-world cyber threat challenges while gaining practical experience throughout the year.

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Common Interview Questions for Threat Detection Engineer Intern
Can you describe your experience with network traffic inspection tools related to the Threat Detection Engineer Intern role?

When answering this question, make sure to mention any specific tools you've used, such as Wireshark or tcpdump. Explain how you utilized these tools for analyzing network traffic and detecting anomalies, emphasizing your familiarity with interpreting the data they generate.

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What interests you the most about pursuing a career in threat detection and cybersecurity?

Share your passion for cybersecurity and the evolving threat landscape. Discuss any experiences or studies that fueled this interest, such as coursework, projects, or personal endeavors related to malware analysis, and how they have motivated you to pursue a role in threat detection.

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How do you prioritize tasks when faced with multiple deadlines in a cybersecurity project?

To answer this effectively, mix your understanding of project management with practical examples such as utilizing to-do lists, prioritizing high-impact tasks, or applying frameworks like Agile or Kanban, depending on your familiarity, while highlighting your ability to manage deadlines efficiently without compromising quality.

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What do you know about writing detection rules for IDS platforms like Snort or Suricata?

Discuss your understanding of intrusion detection concepts, how rules are structured, and the importance of crafting effective signatures. If you have hands-on experience, mention specific examples of how you wrote or modified rules and the outcomes you achieved.

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Can you explain the significance of malware analysis in the role of a Threat Detection Engineer Intern?

Highlight how malware analysis helps in understanding threat behaviors, crafting effective detection rules, and improving overall cybersecurity strategies. You might also reference any coursework or projects where you analyzed malware behavior and the implications for threat detection.

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How would you approach a real-time threat detection scenario?

Discuss a logical approach such as identifying the type of threat, using tools to analyze network traffic or logs, and developing a response plan. Stress the importance of teamwork and communication in resolving such situations efficiently.

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Why is it important to maintain and optimize existing rulesets in a threat detection system?

Mention that maintaining and optimizing rulesets is crucial to ensure the effectiveness and efficiency of threat detection systems. Outdated or irrelevant rules can lead to false positives and wasted resources. Provide examples of how tuning rules can improve performance and reduce alert fatigue.

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What scripting languages are you comfortable with, and how have you used them in your past experiences?

Be specific about the scripting languages you know, especially Lua or Python. Detail any projects where you wrote scripts to automate tasks, analyze data, or enhance detection mechanisms, demonstrating how you applied scripting solutions in real-world scenarios.

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How do you stay updated with the latest trends in the cyber-threat landscape?

Discuss the resources you use to keep informed about cybersecurity trends, such as blogs, forums, webinars, or online courses. Mention any specific cybersecurity news outlets or communities you follow, emphasizing how this knowledge applies to the role of a Threat Detection Engineer Intern.

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What do you think is the biggest challenge facing threat detection today?

Talk about the evolving nature of threats, particularly how cyber attackers are becoming more sophisticated. Highlight the importance of adaptability, innovative detection methods, and continuous learning within the cybersecurity field to combat these challenges effectively.

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Proofpoint is a leading cybersecurity company that protects organizations’ biggest risks and greatest assets: their people. With an integrated suite of cloud-based threat, information and user protection solutions, we help organizations around the...

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Internship, remote
DATE POSTED
April 10, 2025

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