{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,7]],"date-time":"2026-05-07T10:55:29Z","timestamp":1778151329704,"version":"3.51.4"},"reference-count":66,"publisher":"Association for Computing Machinery (ACM)","issue":"1","license":[{"start":{"date-parts":[[2024,3,21]],"date-time":"2024-03-21T00:00:00Z","timestamp":1710979200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"DARPA Advanced Research Project Agency"},{"name":"Naval Warfare Systems Center, Pacific","award":["N66001-18-C-4036"],"award-info":[{"award-number":["N66001-18-C-4036"]}]}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["Digital Threats"],"published-print":{"date-parts":[[2024,3,31]]},"abstract":"<jats:p>\n            Cross-linked threat, vulnerability, and defensive mitigation knowledge is critical in defending against diverse and dynamic cyber threats. Cyber analysts consult it by deductively or inductively creating a chain of reasoning to identify a threat starting from indicators they observe or\n            <jats:italic>vice versa<\/jats:italic>\n            . Cyber hunters use it abductively to reason when hypothesizing specific threats. Threat modelers use it to explore threat postures. We aggregate five public sources of threat knowledge and three public sources of knowledge that describe cyber defensive mitigations, analytics, and engagements and which share some unidirectional links between them. We unify the sources into a graph, and in the graph, we make all unidirectional cross-source links bidirectional. This enhancement of the knowledge makes the questions that analysts and automated systems formulate easier to answer. We demonstrate this in the context of various cyber analytic and hunting tasks as well as modeling and simulations. Because the number of linked entries is very sparse, to further increase the analytic utility of the data, we use natural language processing and supervised machine learning to identify new links. These two contributions demonstrably increase the value of the knowledge sources for cyber security activities.\n          <\/jats:p>","DOI":"10.1145\/3615668","type":"journal-article","created":{"date-parts":[[2023,8,11]],"date-time":"2023-08-11T11:15:04Z","timestamp":1691752504000},"page":"1-33","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":15,"title":["Enhancements to Threat, Vulnerability, and Mitigation Knowledge for Cyber Analytics, Hunting, and Simulations"],"prefix":"10.1145","volume":"5","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2153-3506","authenticated-orcid":false,"given":"Erik","family":"Hemberg","sequence":"first","affiliation":[{"name":"MIT CSAIL, Cambridge, US"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2707-3712","authenticated-orcid":false,"given":"Matthew J.","family":"Turner","sequence":"additional","affiliation":[{"name":"MIT CSAIL, Cambridge, US"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-2642-6755","authenticated-orcid":false,"given":"Nick","family":"Rutar","sequence":"additional","affiliation":[{"name":"Peraton Labs, US"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6923-8445","authenticated-orcid":false,"given":"Una-May","family":"O\u2019reilly","sequence":"additional","affiliation":[{"name":"MIT CSAIL, Cambridge, US"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2024,3,21]]},"reference":[{"key":"e_1_3_3_2_2","unstructured":"NIST. 2022. 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Evidential Cyber Threat Hunting."},{"key":"e_1_3_3_8_2","unstructured":"Greg Brockman Vicki Cheung Ludwig Pettersson Jonas Schneider John Schulman Jie Tang and Wojciech Zaremba. 2016. OpenAI Gym."},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.23919\/TMA.2018.8506545"},{"key":"e_1_3_3_10_2","unstructured":"Jacob Devlin Ming-Wei Chang Kenton Lee and Kristina Toutanova. 2019. BERT: Pre-training of Deep Bidirectional Transformers for Language Understanding."},{"key":"e_1_3_3_11_2","unstructured":"Neil Dhir Henrique Hoeltgebaum Niall Adams Mark Briers Anthony Burke and Paul Jones. 2021. Prospective Artificial Intelligence Approaches for Active Cyber Defence."},{"key":"e_1_3_3_12_2","first-page":"869","volume-title":"28th USENIX Security Symposium (USENIX Security\u201919)","author":"Dong Ying","year":"2019","unstructured":"Ying Dong, Wenbo Guo, Yueqi Chen, Xinyu Xing, Yuqing Zhang, and Gang Wang. 2019. 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