깃발 뺏기 대회에서 성공하기 위한 기술

### 깃발 뺏기(CTF) 챌린지에서 경쟁하기 위한 필수 기술
* 🛠 다양한 도구를 직접 경험하고 팀 협업을 통해 기술을 연마하는 조직적인 이벤트인 만큼 **깃발 뺏기(CTF)의 개념**을 이해하는 것이 중요합니다.
* 📚 에피소드 2에서는 **프로그래밍, 암호화, 익스플로잇 기법, Linux 배포판, 포렌식, 리버스 엔지니어링**에 대한 지식을 포함하여 CTF에서 경쟁력을 갖추기 위해 필요한 **필수 기술**에 중점을 둡니다.
* 💻 "프로그래밍에서 포렌식에 이르기까지 다양한 주제와 공격 유형, 취약점 등에 대한 지식은 **CTF 챌린지에서 성공하기 위한 기본 요소**입니다.
* 🔍 익스플로잇을 위한 주요 도구로는 **서비스 거부(DDoS) 및 ARP 스푸핑**과 같은 웹 기반 취약점 및 공격을 해결하는 데 도움이 되는 **nmap, 와이어샤크, 메타스플로잇**이 있습니다.
* 📊 메모리 손상과 같은 바이너리 익스플로잇 기법과 **버퍼 오버플로 및 SQL 인젝션**과 같은 웹 기반 공격은 참가자들이 집중해야 할 중요한 영역입니다.
* 🔑 프로그래밍 지식은 구문과 논리를 이해하는 데 필수적이며, 특히 **메시지를 암호화하고 해독하는 능력**이 필요한 암호화의 경우 더욱 강조됩니다.
* 🐧 사이버 보안 기술을 발전시키고자 하는 사람들에게는 **모의 침투 테스트 운영 체제, 특히 칼리 리눅스**에 익숙해지는 것이 좋습니다.
* 🔄 마지막으로, 리버스 엔지니어링은 CTF 대회에서 성공하는 데 필요한 **5가지 핵심 기술 전반에 걸쳐 활용**되므로 리버스 엔지니어링에 대한 탄탄한 이해가 필수적입니다.

성공적인 CTF 참가자들은 프로그래밍, 암호화, 익스플로잇 기술, Linux, 포렌식 및 리버스 엔지니어링 기술을 마스터합니다.

You may know what a CTF is already, but do you know what kind of skills you need? Skills pertaining to the computer, even physical security. In this episode, episode 2, we talk about what skills are needed to compete and be at least competitive for CTF. Let's get started. Hi everyone, my name is Grant Collins. This is episode 204. We'll redress the whole topic in the concept behind capture the flag. Capture the flag is an organized event or game used to sharpen your skills, learn, train, and use hands-on experience for different tools and different collaboration efforts with teams. Now you may be thinking, That's all great, but what kind of skills do you need in order to really be good at a CTF? The outline and episode 1 CTF pose challenges for students and professionals like ourselves. Different challenges ranging from programming to forensics to anything of that. Having a knowledge of various topics and types of attacks, vulnerabilities, things of that. There's a bunch of skills. What I'm trying to say here, there's a bunch of

skills that are required to be good for a CTF and to be really competitive in one for CTF. Here are some of the skills that you will need to have developed: programming knowledge, behind cryptography, familiarity in exploitation techniques, Linux distributions, an idea of forensics, and knowledge of the reverse engineering process. Let's break these down further. For programming, you need to have an understanding behind how to read syntax, understanding the logic behind a program, and attempt to reverse-engineer certain techniques. If you are wondering if you should learn programming for cybersecurity or resources to use and languages to learn, I recommend you check out my three-part episode series linked in the cards or in the description below. For cryptography, you need to have an understanding behind the fundamentals behind cryptography. You will have to decipher strings of texts and also understand how to encrypt and decrypt specific messages, so you're really going to need to be good at programming too for cryptography, as alarming as that may sound. So, programming is definitely an emphasis and something that I emphasize.

students start learning right now. There are several different types of exploitation techniques, including binary, web-based, network, and software. Each type of exploitation can be seen and utilized around each CTF, regardless of whether it's a jeopardy style or attack-defense CTF. So, having knowledge behind all of these different types of expectations is very important. Let's go ahead and address just a few examples of what each exploitation is, so you know just having a working understanding and a knowledge of what it is. So, let's go ahead and start with the binary exploitation. So, binary exploitation is commonly used through the attack method of memory corruptions, and a memory corruption is a common binary exploitation technique which can enable an attacker to gain unauthorized privileges to a system and inject their very own scripts. For web-based expectations, we have tons of attacks that we can use here. Just three examples, we have buffer overflow. While a program is a right-angle to a buffer, that buffer's boundaries overran and overwrites into the memory. We have SQL injections. SQL statements are inserted into an entry field of

execution in a database, also known as like a database dump or data dump. Trust site scripting, malicious scripts are injected into trusted app web applications and twigs. Give you an example of some tools we have: nmap, Wireshark, and Metasploit. And these are a few common exploitation tools worked for web front web-based vulnerabilities and attacks. We have Network Expo, a great example would be a denial-of-service attack, also known as a DDoS attack, which attempts to overload a resource with hundreds of botnets or hosts. We have worms, which are self-propagating malware, which exploits system vulnerabilities and spreads across the local network. We have ARP spoofing, which is a type of attack that sends falsified ARP messages over the local area network. And to conclude, we have software type expectations. The one that I could come up with really quickly was key loggers. Key loggers are software or hardware programs that track the activities of a keyboard. The next one is Linux distributions need to have a working knowledge behind Linux, as Linux comes in various variations of

operating systems. We're looking to hone our attention to penetration testing-like operating systems. These three systems include Kali Linux, Black Arch Linux, and Arch Linux. I recommend starting with Kali Linux, and if you want to advance on to more particular systems, you could always go into different Linux distributions which offered even more complex penetration testing tools. But honestly, Linux, Kali Linux, is really the way to go. So, forensics. For this skill, you will need to have an understanding behind how information is stored, how to look for certain files or information hidden with other file types. An example of this, a really basic example, could be a picture, right, with a hidden text file within and embedded within the picture. And then you're gonna have to be the one who looks for that text file within the picture. And then we have to have knowledge behind reverse engineering. The reverse engineering, you need to have a working understanding behind what the process is, how it works, how to conduct reverse engineering in the best way as possible. We'll need to utilize reverse engineering for all five of the skills.

above, I think a lot of people look at Engineering. It is not just itself a process, but you have to reverse-engineer programs, things of that nature. So, making sure that you have a knowledge of what reverse engineering is and the process is very important. These are the most common types of skills that you need to have in order to be successful, competitive in a game of CTF. In the next episode, episode 3, I address the platforms that I recommend students use as a starting, a stepping-stone to developing these skills. So, tune in to episode 3 for more information on that. [Music]

What Skills Do You Need in Capture the Flag for Cybersecurity | Capture the Flag Series

Grant Collins

경쟁적 CTF 참가를 위한 핵심 기술

구문 읽기, 프로그램 로직 이해, 리버스 엔지니어링 기술 등 프로그래밍 지식이 필수적입니다.

텍스트를 해독하고 메시지를 암호화/복호화하려면 암호화에 대한 지식이 필수적입니다.

또한 익스플로잇 기법, Linux 배포판, 포렌식 및 리버스 엔지니어링 프로세스에 대한 지식은 CTF 대회에서 성공하기 위해 중요합니다.

사이버 보안의 일반적인 익스플로잇 기법

일반적으로 데이터 덤프라고 알려진 데이터베이스에서의 실행은 사이버 공격에 사용되는 방법입니다.

웹 기반 취약점을 익스플로잇하는 데는 일반적으로 nmap, 와이어샤크, 메타스플로잇과 같은 도구가 사용됩니다.

바이너리, 웹 기반, 네트워크, 소프트웨어 등 다양한 유형의 익스플로잇 기법은 각각 다양한 사이버 공격 전략에서 중요한 역할을 합니다.

모의 침투 테스트를 위한 주요 운영 체제

칼리 리눅스, 블랙 아치 리눅스, 아치 리눅스는 침투 테스트를 위한 세 가지 주요 운영 체제입니다.

칼리 리눅스는 시작점으로 권장되며, 더 복잡한 도구를 위해 다른 리눅스 배포판으로 발전할 수 있는 옵션이 있습니다.

포렌식 기술에는 정보 저장소를 이해하고 숨겨진 파일을 검색하는 것이 포함되며, 리버스 엔지니어링 지식은 5가지 핵심 기술 모두에 필수적입니다.

깃발 뺏기(CTF) 대회에서 성공하기 위해 필요한 기술

CTF 대회에는 리버스 엔지니어링, 프로그래밍, 다양한 공격 및 취약성에 대한 지식 등 다양한 기술이 필요합니다.

이러한 이벤트는 기술을 연마할 수 있는 실무 경험과 협업 기회를 제공합니다.

다음 에피소드에서는 학생들이 이러한 필수 기술을 개발하기 위한 출발점으로 사용할 수 있는 플랫폼을 추천합니다.