• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.1
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• pp.103-113
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• 2017

Cyber attacks can be classified by type of cyber war, terrorism and crime etc., depending on the purpose and intent. Those are mobilized the various means and tactics which are like hacking, DDoS, propaganda. The damage caused by cyber attacks can be calculated by a variety of categories. We may identify cyber attackers to pursue trace-back based facts including digital forensics etc. However, recent cyber attacks are trying to induce confusion and deception through the manipulation of digital information or even conceal the attack. Therefore, we need to do the harm-based analysis. In this paper, we analyze the damage caused during cyber attacks from economic and political point of view and by inferring the attack intent could classify types of cyber attacks.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.6
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• pp.1595-1606
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• 2018

Recently, there has been an increase in the number of social engineering techniques that indirectly attack the target system administrators or organizational weaknesses rather than the traditional technical cyber attacks that directly attacked the target systems. Accordingly, the type analysis and case study of social engineering techniques are being actively conducted. There has been, however, little effort to derive an analysis model that systematically analyzes social engineering based cyberspace operations. Therefore, this paper aims at building a Social Engineering Based Cyberspace Operations Analysis Model, which can be used as a reference framework for a case study or attack scenario generation of social engineering based cyberspace operations.

• Review of KIISC
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• v.21 no.6
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• pp.24-41
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• 2011

7.7 DDoS공격과 3.4DDoS공격, NH금융전산망마비사건, 네이트 해킹 사건 등은 해킹이 개인적 문제를 지나서, 사회와 국가적인 이슈로 부상되고 있다. 중국은 대학에서 해킹 기법을 가르치고, 인민해방군에 국가일꾼이란 소명의식을 주고 있다. 북한은 지도자의 지시로 노동당과 북한군에서 사이버부대를 직접 교육 운영하고 있다. 미국은 외국으로부터 사이버 공격을 당할 경우 이를 '전쟁 행위'로 간주해 미사일 등으로 대응한다는 방침을 세웠다. 이와 같이 해킹은 국가사이버보안 정책에서 다루어져야 할 필요성이 있다. 본 연구에서는 해커의 변천, 해킹기술과 방법, 해킹 툴, 그리고 해킹 사례를 살펴본다. 또한 해킹 동향 분석에서 해킹기술 동향 분석, 해커(사람) 동향 분석, 해킹 지역(국가) 동향 분석을 통하여 해킹 인력의 조직화, 해킹 기술의 집적화, 해킹 조직의 집중화 연구를 한다. 그리고 국가사이버보안정책에서 해킹에 대한 '국자사이버보안법 시행령' 제정, 국가사이버보안 자문회의, 국가사이버보안 협력회의, 해킹 프로세스 전략, 해킹 전략 추진 방법론, 사이버협력국, 해킹 작전국, 인력 양성국, 해킹 기술국에 관한 저자의 개인 의견을 제안한다.

• Convergence Security Journal
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• v.20 no.4
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• pp.91-101
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• 2020

We analyzed APT attack cases that occurred overseas in the past using a cyber kill chain model and a TTP model. As a result of the analysis, we found that the cyber kill chain model is effective in figuring out the overall outline, but is not suitable for establishing a specific defense strategy, however, TTP model is suitable to have a practical defense system. Based on these analysis results, it is suggested that defense technology development which is based on TTP model to build defense-in-depth system for preparing cyber attacks.

• KIPS Transactions on Computer and Communication Systems
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• v.11 no.10
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• pp.353-362
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• 2022

The Russian-Ukraine war is accompanied by a military armed conflict and cyberattacks are in progress. As Russia designated Korea as an unfriendly country, there is an urgent need to prepare countermeasures as the risk of cyberattacks on Korea has also increased. Accordingly, impact of 19 cyberattack cases were analyzed by their type, and characteristics and implications were derived by examining them from five perspectives, including resource mobilization and technological progress. Through this, a total of seven measures were suggested as countermeasures for the Korean government, including strengthening multilateral cooperation with value-sharing countries, securing cyberattack capabilities and strengthening defense systems, and preparing plans to connect with foreign security companies. The results of this study can be used to establish the Korean government's cybersecurity policy.

• Journal of the Institute of Convergence Signal Processing
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• v.23 no.4
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• pp.209-215
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• 2022

The International Maritime Organization, which is in charge of the international maritime environment and ship safety, has rapidly promoted cyber systems for international dimension agreement and efficiency improvement and improved nautical efficiency. Nevertheless, maritime cyber system attacks still occur every year, and in particular, the number of international maritime cyber security incidents in 2021 appeared to increase sharply compared to 2020. This paper discusses the areas that should be taken into account in order to reduce the increasing sophistication of maritime cyber security. To this end, we will look at typical cases of cyber attacks that have increased sharply in 2021 and analyze the causes of the continuous occurrence of maritime cyber security incidents. In addition, we present several cyber system proposals regarding the current state of maritime cyber systems and the solutions to the problems they face, as well as the matters to be addressed for future maritime cyber systems that will be advanced.

• Convergence Security Journal
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• v.17 no.4
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• pp.17-29
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• 2017

Various cyber attacks against our society and the government are continuing, and cases and damages are reported from time to time. And the area of cyber attack is not limited to cyberspace, but it is expanding into physical domain and affecting it. In the military arena, we have established and implemented the principle of responding proportionally to enemy physical attacks. This proportionality principle is also required in the version where the region is expanding. In order to apply it, it is necessary to have a quantitative and qualitative countermeasure against cyber attack. However, due to the nature of cyber attacks, it is not easy to assess the damage accurately and it is difficult to respond to the proportionality principle and the proportional nature. In this study, we calculated the damage scale by quantitatively and qualitatively evaluating the cyber attack damage using the Gorden-Lobe model and the security scoring technique based on the scenario. It is expected that the calculated results will be provided as appropriate level and criterion to counteract cyber attack.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.165-171
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• 2018

The most threatening attack that has become a hot topic of recent IT security is APT Attack.. So far, there is no way to respond to APT attacks except by using artificial intelligence techniques. Here, we have implemented a machine learning algorithm for analyzing cyber threat data using machine learning method, using a data set that collects cyber attack cases using Scikit Learn, a big data machine learning framework. The result showed an attack classification accuracy close to 70%. This result can be developed into the algorithm of the security control system in the future.

• Proceedings of the Korea Society for Simulation Conference
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• 2000.11a
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• pp.118-124
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• 2000

본 논문은 계층 구조적이고 모듈화 된 모델링 및 시뮬레이션 프레임워크를 이용한 네트워크 보안 모델링과 사이버 공격에 대한 시뮬레이션 기법의 연구를 주목적으로 한다. 단순한 네트워크 모델에서의 원인-결과 모델을 대상으로 시뮬레이션 하는 기존의 접근방법과는 달리, 복잡한 네트워크 보안 모델과 모델 기반의 사이버 공격에 대한 시뮬레이션 기법은 아직까지 시도된 바가 없는 실정이다. 따라서, 본 논문에서는 첫째, System Entity Structure/Model Base(SES/MB)을 통하여 계층 구조적, 모듈화, 객체지향적 설계를 하였고 둘째, 해킹 행위의 상세분석을 위해 취약성을 고려한 명령어 수준의 네트워크 보안 모델링 및 시뮬레이션 방법론을 제안하였다. 마지막으로, 사이버 공격 시나리오를 이용한 사례연구를 통하여 타당성을 검증하였다.

• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.31-37
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• 2020

In this paper, we propose a system architecture and methodology based on cyber kill chain and MITRE ATT&CK for experiment analysis on cyber warfare simulation. Threat analysis is possible by applying various attacks that have actually occurred with continuous updates to reflect newly emerging attacks. In terms of cyber attack and defense, the current system(AS-IS) and the new system(TO-BE) are analyzed for effectiveness and quantitative results are presented. It can be used to establish proactive cyber COA(Course of Action) strategy, and also for strategic decision making. Through a case study, we presented the usability of the system architecture and methodology proposed in this paper. The proposed method will contribute to strengthening cyber warfare capabilities by increasing the level of technology for cyber warfare experiments.