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Due to its crucial role in identity and access management in modern enterprise networks, Active Directory (AD) is a top target of Advanced Persistence Threat (APT) actors. Conventional intrusion detection systems (IDS) excel at identifying…

Cryptography and Security · Computer Science 2026-05-01 Qi Liu , Kaibin Bao , Wajih Ul Hassan , Veit Hagenmeyer

Advanced Persistent Threats (APT) pose a major cybersecurity challenge due to their stealth, persistence, and adaptability. Traditional machine learning detectors struggle with class imbalance, high dimensional features, and scarce real…

Machine Learning · Computer Science 2025-11-26 Sidahmed Benabderrahmane , Talal Rahwan

The constant increase of devices connected to the Internet, and therefore of cyber-attacks, makes it necessary to analyze network traffic in order to recognize malicious activity. Traditional packet-based analysis methods are insufficient…

Anomaly detection to recognize unusual events in large scale systems in a time sensitive manner is critical in many industries, eg. bank fraud, enterprise systems, medical alerts, etc. Large-scale systems often grow in size and complexity…

Machine Learning · Computer Science 2022-10-31 Srishti Mishra , Tvarita Jain , Dinkar Sitaram

Hacking and false data injection from adversaries can threaten power grids' everyday operations and cause significant economic loss. Anomaly detection in power grids aims to detect and discriminate anomalies caused by cyber attacks against…

Machine Learning · Computer Science 2023-03-14 Xijuan Sun , Di Wu , Arnaud Zinflou , Benoit Boulet

The continued digitization of societal processes translates into a proliferation of time series data that cover applications such as fraud detection, intrusion detection, and energy management, where anomaly detection is often essential to…

Anomaly detection has emerged as a popular technique for detecting malicious activities in local area networks (LANs). Various aspects of LAN anomaly detection have been widely studied. Nonetheless, the privacy concern about individual…

Cryptography and Security · Computer Science 2022-04-15 Norrathep Rattanavipanon , Donlapark Ponnoprat , Hideya Ochiai , Kuljaree Tantayakul , Touchai Angchuan , Sinchai Kamolphiwong

The ability to quickly and accurately detect anomalous structure within data sequences is an inference challenge of growing importance. This work extends recently proposed post-hoc (offline) anomaly detection methodology to the sequential…

Methodology · Statistics 2020-09-16 Alexander T. M. Fisch , Lawrence Bardwell , Idris A. Eckley

Unsupervised anomaly detection (AD) is critical for a wide range of practical applications, from network security to health and medical tools. Due to the diversity of problems, no single algorithm has been found to be superior for all AD…

Machine Learning · Computer Science 2023-05-18 Małgorzata Gutowska , Suzanne Little , Andrew McCarren

This study examines how Artificial Intelligence can aid in identifying and mitigating cyber threats in the U.S. across four key areas: intrusion detection, malware classification, phishing detection, and insider threat analysis. Each of…

Advanced persistent threats (APTs) are organized prolonged cyberattacks by sophisticated attackers. Although APT activities are stealthy, they interact with the system components and these interactions lead to information flows. Dynamic…

Computer Science and Game Theory · Computer Science 2021-06-29 Shana Moothedath , Dinuka Sahabandu , Joey Allen , Linda Bushnell , Wenke Lee , Radha Poovendran

Advanced persistent threats pose a significant challenge for blue teams as they apply various attacks over prolonged periods, impeding event correlation and their detection. In this work, we leverage various diverse attack scenarios to…

Cryptography and Security · Computer Science 2022-01-13 George Karantzas , Constantinos Patsakis

During the past decade, many anomaly detection approaches have been introduced in different fields such as network monitoring, fraud detection, and intrusion detection. However, they require understanding of data pattern and often need a…

Machine Learning · Computer Science 2023-01-11 Ming-Chang Lee , Jia-Chun Lin , Ernst Gunnar Gran

In critical applications of anomaly detection including computer security and fraud prevention, the anomaly detector must be configurable by the analyst to minimize the effort on false positives. One important way to configure the anomaly…

Machine Learning · Computer Science 2018-09-19 Shubhomoy Das , Md Rakibul Islam , Nitthilan Kannappan Jayakodi , Janardhan Rao Doppa

Cyber-physical-social systems (CPSSs) have emerged in many applications over recent decades, requiring increased attention to security concerns. The rise of sophisticated threats like Advanced Persistent Threats (APTs) makes ensuring…

Cryptography and Security · Computer Science 2025-01-07 Saba Fathi Rabooki , Bowen Li , Falih Gozi Febrinanto , Ciyuan Peng , Elham Naghizade , Fengling Han , Feng Xia

Anomaly detection suffered from the lack of anomalies due to the diversity of abnormalities and the difficulties of obtaining large-scale anomaly data. Semi-supervised anomaly detection methods are often used to solely leverage normal data…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Jian Shi , Ni Zhang

Extensive research has demonstrated that deep neural networks (DNNs) are prone to adversarial attacks. Although various defense mechanisms have been proposed for image classification networks, fewer approaches exist for video-based models…

Computer Vision and Pattern Recognition · Computer Science 2021-09-14 Nupur Thakur , Baoxin Li

Anomaly detection of sequences is a hot topic in data mining. Anomaly Detection using Piecewise Aggregate approximation in the Amplitude Domain (called ADPAAD) is one of the widely used methods in anomaly detection of sequences. The core…

Quantum Physics · Physics 2022-09-22 Ming-Chao Guo , Hai-Ling Liu , Shi-Jie Pan , Wen-Min Li , Su-Juan Qin , Xin-Yi Huang , Fei Gao , Qiao-Yan Wen

Online sensing plays an important role in advancing modern manufacturing. The real-time sensor signals, which can be stored as high-resolution time series data, contain rich information about the operation status. One of its popular usages…

Machine Learning · Computer Science 2025-10-14 Frida Cantu , Salomon Ibarra , Arturo Gonzales , Jesus Barreda , Chenang Liu , Li Zhang

Anomaly Detection (AD) and Anomaly Localization (AL) are crucial in fields that demand high reliability, such as medical imaging and industrial monitoring. However, current AD and AL approaches are often susceptible to adversarial attacks…

Computer Vision and Pattern Recognition · Computer Science 2025-10-27 Mojtaba Nafez , Amirhossein Koochakian , Arad Maleki , Jafar Habibi , Mohammad Hossein Rohban