Free Malware Sample Sources for Researchers

Malware researchers frequently seek malware samples to analyze threat techniques and develop defenses. In addition to downloading samples from known malicious URLs, researchers can obtain malware samples from the following free sources:

Be careful not to infect yourself when accessing and experimenting with malicious software.

My other lists of online security resources outline Automated Malware Analysis Services and On-Line Tools for Malicious Website Lookups. Also, take a look at tips sharing malware samples with other researchers.

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About the Author

Lenny Zeltser develops teams, products, and programs that use information security to achieve business results. Over the past two decades, Lenny has been leading efforts to establish resilient security practices and solve hard security problems. As a respected author and speaker, he has been advancing cybersecurity tradecraft and contributing to the community. His insights build upon 20 years of real-world experiences, a Computer Science degree from the University of Pennsylvania, and an MBA degree from MIT Sloan.

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