As the development of cyber technologies, the risk of cybercrime, cyberespionage, cyberterrorism, and advanced persistent threats is also increasing greatly. In particular, the attack techniques as well as the speed in launching these attacks are rapidly improving. As both volume and complexity of malware attacks increase, traditional analytic tooling and infrastructure have become difficult to keep up. Big data analytics are being developed as a promising way to address these challenges. Due to the characteristics of big data, such as huge amount of data and sheer breadth and coverage, Cybersecurity analytics for big data can provide unprecedented cybersecurity capabilities to proactively monitor, analyze, and mitigate sophisticated and advanced cybersecurity threats and exploitations. This workshop aims to exploit big data analytics capabilities including innovative techniques, metrics, and behavior analysis to address the cybersecurity challenges. Contributions that push the state of the art in all facets of big data cybersecurity analytics are encouraged and welcomed.