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2021-05-13
S, Naveen, Puzis, Rami, Angappan, Kumaresan.  2020.  Deep Learning for Threat Actor Attribution from Threat Reports. 2020 4th International Conference on Computer, Communication and Signal Processing (ICCCSP). :1–6.
Threat Actor Attribution is the task of identifying an attacker responsible for an attack. This often requires expert analysis and involves a lot of time. There had been attempts to detect a threat actor using machine learning techniques that use information obtained from the analysis of malware samples. These techniques will only be able to identify the attack, and it is trivial to guess the attacker because various attackers may adopt an attack method. A state-of-the-art method performs attribution of threat actors from text reports using Machine Learning and NLP techniques using Threat Intelligence reports. We use the same set of Threat Reports of Advanced Persistent Threats (APT). In this paper, we propose a Deep Learning architecture to attribute Threat actors based on threat reports obtained from various Threat Intelligence sources. Our work uses Neural Networks to perform the task of attribution and show that our method makes the attribution more accurate than other techniques and state-of-the-art methods.
2021-01-28
Wang, W., Tang, B., Zhu, C., Liu, B., Li, A., Ding, Z..  2020.  Clustering Using a Similarity Measure Approach Based on Semantic Analysis of Adversary Behaviors. 2020 IEEE Fifth International Conference on Data Science in Cyberspace (DSC). :1—7.

Rapidly growing shared information for threat intelligence not only helps security analysts reduce time on tracking attacks, but also bring possibilities to research on adversaries' thinking and decisions, which is important for the further analysis of attackers' habits and preferences. In this paper, we analyze current models and frameworks used in threat intelligence that suited to different modeling goals, and propose a three-layer model (Goal, Behavior, Capability) to study the statistical characteristics of APT groups. Based on the proposed model, we construct a knowledge network composed of adversary behaviors, and introduce a similarity measure approach to capture similarity degree by considering different semantic links between groups. After calculating similarity degrees, we take advantage of Girvan-Newman algorithm to discover community groups, clustering result shows that community structures and boundaries do exist by analyzing the behavior of APT groups.

2020-09-21
Osman, Amr, Bruckner, Pascal, Salah, Hani, Fitzek, Frank H. P., Strufe, Thorsten, Fischer, Mathias.  2019.  Sandnet: Towards High Quality of Deception in Container-Based Microservice Architectures. ICC 2019 - 2019 IEEE International Conference on Communications (ICC). :1–7.
Responding to network security incidents requires interference with ongoing attacks to restore the security of services running on production systems. This approach prevents damage, but drastically impedes the collection of threat intelligence and the analysis of vulnerabilities, exploits, and attack strategies. We propose the live confinement of suspicious microservices into a sandbox network that allows to monitor and analyze ongoing attacks under quarantine and that retains an image of the vulnerable and open production network. A successful sandboxing requires that it happens completely transparent to and cannot be detected by an attacker. Therefore, we introduce a novel metric to measure the Quality of Deception (QoD) and use it to evaluate three proposed network deception mechanisms. Our evaluation results indicate that in our evaluation scenario in best case, an optimal QoD is achieved. In worst case, only a small downtime of approx. 3s per microservice (MS) occurs and thus a momentary drop in QoD to 70.26% before it converges back to optimum as the quarantined services are restored.
2020-08-28
Perry, Lior, Shapira, Bracha, Puzis, Rami.  2019.  NO-DOUBT: Attack Attribution Based On Threat Intelligence Reports. 2019 IEEE International Conference on Intelligence and Security Informatics (ISI). :80—85.

The task of attack attribution, i.e., identifying the entity responsible for an attack, is complicated and usually requires the involvement of an experienced security expert. Prior attempts to automate attack attribution apply various machine learning techniques on features extracted from the malware's code and behavior in order to identify other similar malware whose authors are known. However, the same malware can be reused by multiple actors, and the actor who performed an attack using a malware might differ from the malware's author. Moreover, information collected during an incident may contain many clues about the identity of the attacker in addition to the malware used. In this paper, we propose a method of attack attribution based on textual analysis of threat intelligence reports, using state of the art algorithms and models from the fields of machine learning and natural language processing (NLP). We have developed a new text representation algorithm which captures the context of the words and requires minimal feature engineering. Our approach relies on vector space representation of incident reports derived from a small collection of labeled reports and a large corpus of general security literature. Both datasets have been made available to the research community. Experimental results show that the proposed representation can attribute attacks more accurately than the baselines' representations. In addition, we show how the proposed approach can be used to identify novel previously unseen threat actors and identify similarities between known threat actors.

2020-08-13
Wang, Tianyi, Chow, Kam Pui.  2019.  Automatic Tagging of Cyber Threat Intelligence Unstructured Data using Semantics Extraction. 2019 IEEE International Conference on Intelligence and Security Informatics (ISI). :197—199.
Threat intelligence, information about potential or current attacks to an organization, is an important component in cyber security territory. As new threats consecutively occurring, cyber security professionals always keep an eye on the latest threat intelligence in order to continuously lower the security risks for their organizations. Cyber threat intelligence is usually conveyed by structured data like CVE entities and unstructured data like articles and reports. Structured data are always under certain patterns that can be easily analyzed, while unstructured data have more difficulties to find fixed patterns to analyze. There exists plenty of methods and algorithms on information extraction from structured data, but no current work is complete or suitable for semantics extraction upon unstructured cyber threat intelligence data. In this paper, we introduce an idea of automatic tagging applying JAPE feature within GATE framework to perform semantics extraction upon cyber threat intelligence unstructured data such as articles and reports. We extract token entities from each cyber threat intelligence article or report and evaluate the usefulness of them. A threat intelligence ontology then can be constructed with the useful entities extracted from related resources and provide convenience for professionals to find latest useful threat intelligence they need.
2020-08-07
Chandel, Sonali, Yan, Mengdi, Chen, Shaojun, Jiang, Huan, Ni, Tian-Yi.  2019.  Threat Intelligence Sharing Community: A Countermeasure Against Advanced Persistent Threat. 2019 IEEE Conference on Multimedia Information Processing and Retrieval (MIPR). :353—359.
Advanced Persistent Threat (APT) having focused target along with advanced and persistent attacking skills under great concealment is a new trend followed for cyber-attacks. Threat intelligence helps in detecting and preventing APT by collecting a host of data and analyzing malicious behavior through efficient data sharing and guaranteeing the safety and quality of information exchange. For better protection, controlled access to intelligence information and a grading standard to revise the criteria in diagnosis for a security breach is needed. This paper analyses a threat intelligence sharing community model and proposes an improvement to increase the efficiency of sharing by rethinking the size and composition of a sharing community. Based on various external environment variables, it filters the low-quality shared intelligence by grading the trust level of a community member and the quality of a piece of intelligence. We hope that this research can fill in some security gaps to help organizations make a better decision in handling the ever-increasing and continually changing cyber-attacks.
2020-07-10
Yang, Ying, Yu, Huanhuan, Yang, Lina, Yang, Ming, Chen, Lijuan, Zhu, Guichun, Wen, Liqiang.  2019.  Hadoop-based Dark Web Threat Intelligence Analysis Framework. 2019 IEEE 3rd Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC). :1088—1091.

With the development of network services and people's privacy requirements continue to increase. On the basis of providing anonymous user communication, it is necessary to protect the anonymity of the server. At the same time, there are many threatening crime messages in the dark network. However, many scholars lack the ability or expertise to conduct research on dark-net threat intelligence. Therefore, this paper designs a framework based on Hadoop is hidden threat intelligence. The framework uses HDFS as the underlying storage system to build a HBase-based distributed database to store and manage threat intelligence information. According to the heterogeneous type of the forum, the web crawler is used to collect data through the anonymous TOR tool. The framework is used to identify the characteristics of key dark network criminal networks, which is the basis for the later dark network research.

2020-04-06
Li, Jiabin, Xue, Zhi.  2019.  Distributed Threat Intelligence Sharing System: A New Sight of P2P Botnet Detection. 2019 2nd International Conference on Computer Applications Information Security (ICCAIS). :1–6.

Botnet has been evolving over time since its birth. Nowadays, P2P (Peer-to-Peer) botnet has become a main threat to cyberspace security, owing to its strong concealment and easy expansibility. In order to effectively detect P2P botnet, researchers often focus on the analysis of network traffic. For the sake of enriching P2P botnet detection methods, the author puts forward a new sight of applying distributed threat intelligence sharing system to P2P botnet detection. This system aims to fight against distributed botnet by using distributed methods itself, and then to detect botnet in real time. To fulfill the goal of botnet detection, there are 3 important parts: the threat intelligence sharing and evaluating system, the BAV quantitative TI model, and the AHP and HMM based analysis algorithm. Theoretically, this method should work on different types of distributed cyber threat besides P2P botnet.

2019-12-18
Healey, Jason, Jenkins, Neil.  2019.  Rough-and-Ready: A Policy Framework to Determine if Cyber Deterrence is Working or Failing. 2019 11th International Conference on Cyber Conflict (CyCon). 900:1–20.
This paper addresses the recent shift in the United States' policy that emphasizes forward defense and deterrence and to “intercept and halt” adversary cyber operations. Supporters believe these actions should significantly reduce attacks against the United States, while critics worry that they may incite more adversary activity. As there is no standard methodology to measure which is the case, this paper introduces a transparent framework to better assess whether the new U.S. policy and actions are suppressing or encouraging attacks1. Determining correlation and causation will be difficult due to the hidden nature of cyber attacks, the veiled motivations of differing actors, and other factors. However even if causation may never be clear, changes in the direction and magnitude of cyber attacks can be suggestive of the success or failure of these new policies, especially as their proponents suggest they should be especially effective. Rough-and-ready metrics can be helpful to assess the impacts of policymaking, can lay the groundwork for more comprehensive measurements, and may also provide insight into academic theories of persistent engagement and deterrence.
2019-07-01
Urias, V. E., Stout, M. S. William, Leeuwen, B. V..  2018.  On the Feasibility of Generating Deception Environments for Industrial Control Systems. 2018 IEEE International Symposium on Technologies for Homeland Security (HST). :1–6.

The cyber threat landscape is a constantly morphing surface; the need for cyber defenders to develop and create proactive threat intelligence is on the rise, especially on critical infrastructure environments. It is commonly voiced that Supervisory Control and Data Acquisition (SCADA) systems and Industrial Control Systems (ICS) are vulnerable to the same classes of threats as other networked computer systems. However, cyber defense in operational ICS is difficult, often introducing unacceptable risks of disruption to critical physical processes. This is exacerbated by the notion that hardware used in ICS is often expensive, making full-scale mock-up systems for testing and/or cyber defense impractical. New paradigms in cyber security have focused heavily on using deception to not only protect assets, but also gather insight into adversary motives and tools. Much of the work that we see in today's literature is focused on creating deception environments for traditional IT enterprise networks; however, leveraging our prior work in the domain, we explore the opportunities, challenges and feasibility of doing deception in ICS networks.

2019-05-20
Gschwandtner, Mathias, Demetz, Lukas, Gander, Matthias, Maier, Ronald.  2018.  Integrating Threat Intelligence to Enhance an Organization's Information Security Management. Proceedings of the 13th International Conference on Availability, Reliability and Security. :37:1-37:8.

As security incidents might have disastrous consequences on an enterprise's information technology (IT), organizations need to secure their IT against threats. Threat intelligence (TI) promises to provide actionable information about current threats for information security management systems (ISMS). Common information range from malware characteristics to observed perpetrator origins that allow customizing security controls. The aim of this article is to assess the impact of utilizing public available threat feeds within the corporate process on an organization's security information level. We developed a framework to integrate TI for large corporations and evaluated said framework in cooperation with a global acting manufacturer and retailer. During the development of the TI framework, a specific provider of TI was analyzed and chosen for integration within the process of vulnerability management. The evaluation of this exemplary integration was assessed by members of the information security department at the cooperating enterprise. During our evaluation it was emphasized that a prioritization of management activities based on whether threats that have been observed in the wild are targeting them or similar companies. Furthermore, indicators of compromise (IoC) provided by the chosen TI source, can be automatically integrated utilizing a provided software development kit. Theoretical relevance is based on the contribution towards the verification of proposed benefits of TI integration, such as increasing the resilience of an enterprise network, within a real-world environment. Overall, practitioners suggest that TI integration should result in enhanced management of security budgets and more resilient enterprise networks.

2019-03-04
Kannavara, R., Vangore, J., Roberts, W., Lindholm, M., Shrivastav, P..  2018.  Automating Threat Intelligence for SDL. 2018 IEEE Cybersecurity Development (SecDev). :137–137.
Threat intelligence is very important in order to execute a well-informed Security Development Lifecycle (SDL). Although there are many readily available solutions supporting tactical threat intelligence focusing on enterprise Information Technology (IT) infrastructure, the lack of threat intelligence solutions focusing on SDL is a known gap which is acknowledged by the security community. To address this shortcoming, we present a solution to automate the process of mining open source threat information sources to deliver product specific threat indicators designed to strategically inform the SDL while continuously monitoring for disclosures of relevant potential vulnerabilities during product design, development, and beyond deployment.
2019-02-13
Sykosch, Arnold, Ohm, Marc, Meier, Michael.  2018.  Hunting Observable Objects for Indication of Compromise. Proceedings of the 13th International Conference on Availability, Reliability and Security. :59:1–59:8.
Shared Threat Intelligence is often imperfect. Especially so called Indicator of Compromise might not be well constructed. This might either be the case if the threat only appeared recently and recordings do not allow for construction of high quality Indicators or the threat is only observed by sharing partners lesser capable to model the threat. However, intrusion detection based on imperfect intelligence yields low quality results. Within this paper we illustrate how one is able to overcome these shortcomings in data quality and is able to achieve solid intrusion detection. This is done by assigning individual weights to observables listed in a STIX™ report to express their significance for detection. For evaluation, an automatized toolchain was developed to mimic the Threat Intelligence sharing ecosystem from initial detection over reporting, sharing, and determining compromise by STIX™-formated data. Multiple strategies to detect and attribute a specific threat are compared using this data, leading up to an approach yielding a F1-Score of 0.79.
2018-08-23
Blenn, Norbert, Ghiëtte, Vincent, Doerr, Christian.  2017.  Quantifying the Spectrum of Denial-of-Service Attacks Through Internet Backscatter. Proceedings of the 12th International Conference on Availability, Reliability and Security. :21:1–21:10.
Denial of Service (DoS) attacks are a major threat currently observable in computer networks and especially the Internet. In such an attack a malicious party tries to either break a service, running on a server, or exhaust the capacity or bandwidth of the victim to hinder customers to effectively use the service. Recent reports show that the total number of Distributed Denial of Service (DDoS) attacks is steadily growing with "mega-attacks" peaking at hundreds of gigabit/s (Gbps). In this paper, we will provide a quantification of DDoS attacks in size and duration beyond these outliers reported in the media. We find that these mega attacks do exist, but the bulk of attacks is in practice only a fraction of these frequently reported values. We further show that it is feasible to collect meaningful backscatter traces using surprisingly small telescopes, thereby enabling a broader audience to perform attack intelligence research.
Cheah, M., Bryans, J., Fowler, D. S., Shaikh, S. A..  2017.  Threat Intelligence for Bluetooth-Enabled Systems with Automotive Applications: An Empirical Study. 2017 47th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops (DSN-W). :36–43.

Modern vehicles are opening up, with wireless interfaces such as Bluetooth integrated in order to enable comfort and safety features. Furthermore a plethora of aftermarket devices introduce additional connectivity which contributes to the driving experience. This connectivity opens the vehicle to potentially malicious attacks, which could have negative consequences with regards to safety. In this paper, we survey vehicles with Bluetooth connectivity from a threat intelligence perspective to gain insight into conditions during real world driving. We do this in two ways: firstly, by examining Bluetooth implementation in vehicles and gathering information from inside the cabin, and secondly, using war-nibbling (general monitoring and scanning for nearby devices). We find that as the vehicle age decreases, the security (relatively speaking) of the Bluetooth implementation increases, but that there is still some technological lag with regards to Bluetooth implementation in vehicles. We also find that a large proportion of vehicles and aftermarket devices still use legacy pairing (and are therefore more insecure), and that these vehicles remain visible for sufficient time to mount an attack (assuming some premeditation and preparation). We demonstrate a real-world threat scenario as an example of the latter. Finally, we provide some recommendations on how the security risks we discover could be mitigated.

2018-05-30
Mohaisen, Aziz, Al-Ibrahim, Omar, Kamhoua, Charles, Kwiat, Kevin, Njilla, Laurent.  2017.  Rethinking Information Sharing for Threat Intelligence. Proceedings of the Fifth ACM/IEEE Workshop on Hot Topics in Web Systems and Technologies. :6:1–6:7.

In the past decade, the information security and threat landscape has grown significantly making it difficult for a single defender to defend against all attacks at the same time. This called for introducing information sharing, a paradigm in which threat indicators are shared in a community of trust to facilitate defenses. Standards for representation, exchange, and consumption of indicators are proposed in the literature, although various issues are undermined. In this paper, we take the position of rethinking information sharing for actionable intelligence, by highlighting various issues that deserve further exploration. We argue that information sharing can benefit from well-defined use models, threat models, well-understood risk by measurement and robust scoring, well-understood and preserved privacy and quality of indicators and robust mechanism to avoid free riding behavior of selfish agents. We call for using the differential nature of data and community structures for optimizing sharing designs and structures.

2018-04-11
Gascon, Hugo, Grobauer, Bernd, Schreck, Thomas, Rist, Lukas, Arp, Daniel, Rieck, Konrad.  2017.  Mining Attributed Graphs for Threat Intelligence. Proceedings of the Seventh ACM on Conference on Data and Application Security and Privacy. :15–22.

Understanding and fending off attack campaigns against organizations, companies and individuals, has become a global struggle. As today's threat actors become more determined and organized, isolated efforts to detect and reveal threats are no longer effective. Although challenging, this situation can be significantly changed if information about security incidents is collected, shared and analyzed across organizations. To this end, different exchange data formats such as STIX, CyBOX, or IODEF have been recently proposed and numerous CERTs are adopting these threat intelligence standards to share tactical and technical threat insights. However, managing, analyzing and correlating the vast amount of data available from different sources to identify relevant attack patterns still remains an open problem. In this paper we present Mantis, a platform for threat intelligence that enables the unified analysis of different standards and the correlation of threat data trough a novel type-agnostic similarity algorithm based on attributed graphs. Its unified representation allows the security analyst to discover similar and related threats by linking patterns shared between seemingly unrelated attack campaigns through queries of different complexity. We evaluate the performance of Mantis as an information retrieval system for threat intelligence in different experiments. In an evaluation with over 14,000 CyBOX objects, the platform enables retrieving relevant threat reports with a mean average precision of 80%, given only a single object from an incident, such as a file or an HTTP request. We further illustrate the performance of this analysis in two case studies with the attack campaigns Stuxnet and Regin.

2017-12-04
Fraunholz, D., Zimmermann, M., Anton, S. D., Schneider, J., Schotten, H. Dieter.  2017.  Distributed and highly-scalable WAN network attack sensing and sophisticated analysing framework based on Honeypot technology. 2017 7th International Conference on Cloud Computing, Data Science Engineering - Confluence. :416–421.

Recently, the increase of interconnectivity has led to a rising amount of IoT enabled devices in botnets. Such botnets are currently used for large scale DDoS attacks. To keep track with these malicious activities, Honeypots have proven to be a vital tool. We developed and set up a distributed and highly-scalable WAN Honeypot with an attached backend infrastructure for sophisticated processing of the gathered data. For the processed data to be understandable we designed a graphical frontend that displays all relevant information that has been obtained from the data. We group attacks originating in a short period of time in one source as sessions. This enriches the data and enables a more in-depth analysis. We produced common statistics like usernames, passwords, username/password combinations, password lengths, originating country and more. From the information gathered, we were able to identify common dictionaries used for brute-force login attacks and other more sophisticated statistics like login attempts per session and attack efficiency.

2017-11-03
Liao, K., Zhao, Z., Doupe, A., Ahn, G. J..  2016.  Behind closed doors: measurement and analysis of CryptoLocker ransoms in Bitcoin. 2016 APWG Symposium on Electronic Crime Research (eCrime). :1–13.

Bitcoin, a decentralized cryptographic currency that has experienced proliferating popularity over the past few years, is the common denominator in a wide variety of cybercrime. We perform a measurement analysis of CryptoLocker, a family of ransomware that encrypts a victim's files until a ransom is paid, within the Bitcoin ecosystem from September 5, 2013 through January 31, 2014. Using information collected from online fora, such as reddit and BitcoinTalk, as an initial starting point, we generate a cluster of 968 Bitcoin addresses belonging to CryptoLocker. We provide a lower bound for CryptoLocker's economy in Bitcoin and identify 795 ransom payments totalling 1,128.40 BTC (\$310,472.38), but show that the proceeds could have been worth upwards of \$1.1 million at peak valuation. By analyzing ransom payment timestamps both longitudinally across CryptoLocker's operating period and transversely across times of day, we detect changes in distributions and form conjectures on CryptoLocker that corroborate information from previous efforts. Additionally, we construct a network topology to detail CryptoLocker's financial infrastructure and obtain auxiliary information on the CryptoLocker operation. Most notably, we find evidence that suggests connections to popular Bitcoin services, such as Bitcoin Fog and BTC-e, and subtle links to other cybercrimes surrounding Bitcoin, such as the Sheep Marketplace scam of 2013. We use our study to underscore the value of measurement analyses and threat intelligence in understanding the erratic cybercrime landscape.