Are public intrusion datasets fit for purpose characterising the state of the art in intrusion event datasets

Abstract

In recent years cybersecurity attacks have caused major disruption and information loss for online organisations, with high profile incidents in the news. One of the key challenges in advancing the state of the art in intrusion detection is the lack of representative datasets. These datasets typically contain millions of time-ordered events (e.g. network packet traces, flow summaries, log entries); subsequently analysed to identify abnormal behavior and specific attacks [1]. Generating realistic datasets has historically required expensive networked assets, specialised traffic generators, and considerable design preparation. Even with advances in virtualisation it remains challenging to create and maintain a representative environment. Major improvements are needed in the design, quality and availability of datasets, to assist researchers in developing advanced detection techniques. With the emergence of new technology paradigms, such as intelligent transport and autonomous vehicles, it is also likely that new classes of threat will emerge [2]. Given the rate of change in threat behavior [3] datasets become quickly obsolete, and some of the most widely cited datasets date back over two decades. Older datasets have limited value: often heavily filtered and anonymised, with unrealistic event distributions, and opaque design methodology. The relative scarcity of (Intrusion Detection System) IDS datasets is compounded by the lack of a central registry, and inconsistent information on provenance. Researchers may also find it hard to locate datasets or understand their relative merits. In addition, many datasets rely on simulation, originating from academic or government institutions. The publication process itself often creates conflicts, with the need to de-identify sensitive information in order to meet regulations such as General Data Protection Act (GDPR) [4]. Another final issue for researchers is the lack of standardised metrics with which to compare dataset quality. In this paper we attempt to classify the most widely used public intrusion datasets, providing references to archives and associated literature. We illustrate their relative utility and scope, highlighting the threat composition, formats, special features, and associated limitations. We identify best practice in dataset design, and describe potential pitfalls of designing anomaly detection techniques based on data that may be either inappropriate, or compromised due to unrealistic threat coverage. Such contributions as made in this paper is expected to facilitate continuous research and development for effectively combating the constantly evolving cyber threat landscape.

Exploiting the Outcome of Outlier Detection for Novel Attack Pattern Recognition on Streaming Data

“…However, this data source lacks ground truth information such that generated clusters by GAC or our SOAAPR approach cannot be evaluated for their accuracy. Since we are interested in the complete processing pipeline starting from the detection of outliers in X t by the online OD algorithms, we set our focus on recent IDS datasets such as CICIDS2017 [61] and CSE-CIC-IDS2018 (License: https://registry.opendata.aws/cse-cic-ids2018/ (accessed on 25 June 2021) [61] provided by the University of New Brunswick on AWS or UNSW-NB15 since long-serving and still widely used datasets, such as KDD Cup 99 (http://kdd.ics.uci.edu/databases/ kddcup99/kddcup99.html (accessed on 25 June 2021) or NSL-KDD (https://www.unb.ca/ cic/datasets/nsl.html (accessed on 25 June 2021), have been criticized by many researchers over the past couple of years [61,69]. Especially for the evaluation of anomaly-based IDS methods, the latest updated datasets, such as CSE-CIC-IDS2018, should be utilized [70].…”

Unsupervised Feature Selection for Outlier Detection on Streaming Data to Enhance Network Security

“…Rather than relying on a security-domain specific single dataset such as KDD'99, NSL-KDD or a predestined younger one CSE-CIC-IDS2018 (https://registry.opendata.aws/csecic-ids2018/, accessed on 5 March 2021), we have deliberately chosen real-world candidate datasets from the ODDS (http://odds.cs.stonybrook.edu/about-odds/, accessed on 5 March 2021) (Outlier Detection DataSets) Library [65] which are commonly used to evaluate OD methods for various reasons. In recent years, the majority of state-of-the-art IDS datasets have been criticized by many researchers since their data is out of date or do not represent today's threat landscape [51,66,67]. Even if CSE-CIC-IDS2018 overcomes some shortcomings, it was not optimal for the extensive number of measurements performed (Figure 5) due to its enormous number of data instances in multiple files.…”

Datasets are not Enough: Challenges in Labeling Network Traffic

“…When choosing a dataset to train or test a SNIDS it is necessary to consider the representiveness and accuracy of the data events. Obtaining representative, accurate, useful and correct-labeled network traffic data is significantly challenging, and maintaining such data sets is often impractical [36]. Many organizations that have the ability to generate and publish useful data are very protective of such information; not least because publishing traffic data has the potential to expose sensitive information.…”

“…The datasets mentioned in Table 1 shows a considerable diversity in terms of the number of captured attacks. As stated by [36], many of the available public labeled datasets for research are static. They represent the network behavior just for a particular time period.…”

“…The work of [36] enumerate several other common flaws in current labeled datasets. Among them, labels accuracy together network representation emerge as one of the most important requirements of a high-quality dataset.…”