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Security & Network

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Computer Security

System Hacking & Reversing: Learning Everything from Beginner to Intermediate in One Go

A complete curriculum for those learning hacking for the first time. From beginner to intermediate, finish it all with a single course.

(4.8) 24 reviews

231 learners

Level Basic

Course period Unlimited

System Hacking
System Hacking
security training
security training
System Hacking
System Hacking
security training
security training
Thumbnail

Reviews from Early Learners

Reviews from Early Learners

4.8

5.0

시원

19% enrolled

While studying computer science, I vaguely dreamed of working in the security field, but there weren't many classes on the subject, and even when I searched online, there was less information compared to other fields, which left me feeling really lost. However, through detailed and Kind lectures that even non-majors could understand, and numerous practice problems that were great for reviewing and reinforcing what I learned in the lectures, I gradually gained confidence and hope that I could work in this field. It didn't stop there - through Discord, I was able to get quick answers to questions, information about various competitions, and opportunities to form teams. Although I haven't completed all the lectures yet, I want to finish them all and achieve my dream. I'm truly grateful to have this experience at such an affordable price!

5.0

abba010327

31% enrolled

I am enjoying your lectures.

5.0

lillilllilllilli

100% enrolled

It was easy to follow because you explained it step by step.

What you will gain after the course

  • Practical hacking techniques ranging from analysis to exploit.

  • Practicing hacking techniques through CTF and wargames

  • Hacking knowledge, including executable files and memory structures

  • Practical Hacking from Basic to Intermediate

🧠 Now recruiting students for the Knock On Reverse Engineering & System Hacking Track!

Go to see detailed information!

👋 Does learning how to hack feel difficult and unfamiliar?

Everyone feels that way at first.
Binary, assembly, stack overflow…
You don't even know where to start,
and even if you try following a video, you get stuck right away.
Everything you search for is full of confusing terms, so you eventually end up giving up.

🎯 That is why I created this course.

For beginners who want to 'truly' learn hacking,
it has been structured step-by-step so that you can learn by doing the things you don't understand.

This is not a lecture that ends with just explaining theories.
It is a security education where you directly analyze, debug, attack, and seize permissions.
And in that process,
you will be able to think like a hacker and grow like a hacker.


  • We avoid long-running follow-along style lectures.

  • Through the lecture, you will establish a direction for progress,

  • Practical assignments will help you develop your critical thinking skills, and

  • You will acquire the intuition of a hacker who performs attacks directly.

스크린린

🚀 Why this course is 'truly beginner-centered'

🧐 The KnockOn LMS is ready, making it easy for even beginners to get started.

An environment is ready where you can engage in studying all educational materials and wargame practice at any time.

화면 캡처 2025-06-09 233107

💬 When you have a question, don't struggle with it alone.

You can ask questions at any time and receive real-time feedback in the dedicated community that operates 24 hours a day.

질문1
discordQnA

📚 It's okay even if you don't have a foundation.

Programming, networks, computer architecture...
We provide self-directed learning materials for those who are new to these topics.
Everything is structured so that you can review and prepare for all the concepts covered in the lectures on your own.

화면 캡처 2025-06-09 233956

*We provide self-directed learning materials to help you master foundational knowledge such as Linux and C.

💻 We even build the practice environment for you.

Don't waste time installing and configuring environments.
We provide a hacking practice environment accessible with just one click.
Your own personal playground is open 24 hours a day.

화면 캡처 2025-06-12 230642

🛡 Opportunity to join the Knockon hacking team

This curriculum covers all the lecture content and, for those who wish, leads to actual hacking CTF team activities.
It provides an opportunity for growth, not just simple attendance.

Various external activity opportunities such as One-day Analysis, Bug Bounty, and CTF participation are available!

Recommended for
these people

Who is this course right for?

  • Those who are interested in hacking but don't know where to start

  • Those who want to learn system hacking and reversing from the basics

  • Those who want to learn through hands-on practice

  • Those who got stuck while studying alone

  • Aspiring white hat hackers who want to think like a hacker

  • Aspiring hackers who want to challenge themselves in CTF/Bug Bounty

Need to know before starting?

  • Basic understanding of computers

  • Experience using very simple Linux commands

  • The basic structure of C or Python

  • As long as you have an interest in hacking and a willingness to learn, you're good to go!

Hello
This is knockOn

806

Learners

86

Reviews

50

Answers

4.9

Rating

5

Courses

Hello! We are knockOn, a company of hackers.

Instagram : https://www.instagram.com/knockon_official/

Our company was established to resolve the concerns of beginners feeling lost in hacking, developers wanting to gain security knowledge, and students majoring in the field who wish to pursue a career in security.

  • Students who want to get into hacking often find themselves asking questions like, "Do I need to start with coding first?", "How much do I need to know?", or "How does hacking actually work?" Many also have a simple fascination with it, thinking, "Hacking looks so cool—maybe I should give it a try." Our goal is to provide lectures that resolve these uncertainties and help students take their first steps into the field, turning that initial curiosity into real-world skills.

  • I believe many developers who want to gain security knowledge start studying because of the anxiety that their websites or services might be hacked, or to gain a competitive edge for landing a job at a better company. For these individuals, we conduct our lectures with the goal of providing compact, short, and high-density content.

  • I believe students majoring in this field who want to pursue a career in security likely feel the most overwhelmed. This is because school classes don't provide sufficient knowledge of security, and there are no specialized educational institutions available. It is extremely difficult to handle this on your own, so we are conducting these lectures to help you experience various security roles (penetration testing, red teaming, freelancing, etc.) and assist you in deciding on a specific career path.

With a curriculum that has produced security team members for major corporations such as Kakao, Baedal Minjok, and NCSoft, we have structured the course to guide students step-by-step from basic C programming to advanced hacking, ensuring that even those with zero prior knowledge of computer science can follow along.

More

Curriculum

All

72 lectures ∙ (4hr 36min)

Course Materials:

Published: 
Last updated: 

Reviews

All

24 reviews

4.8

24 reviews

  • abba0103272615님의 프로필 이미지
    abba0103272615

    Reviews 5

    ∙

    Average Rating 5.0

    5

    31% enrolled

    I am enjoying your lectures.

    • knockon
      Instructor

      Thank you for the review! I'm so glad to hear that you're enjoying the lectures. I designed this course with the hope that learning would be an enjoyable process rather than a burden, and it's very encouraging to hear that you feel that way. I will make sure the remaining lectures are well-prepared so that they continue to be both fun and meaningful for you until the end.

  • cool29님의 프로필 이미지
    cool29

    Reviews 1

    ∙

    Average Rating 5.0

    5

    19% enrolled

    While studying computer science, I vaguely dreamed of working in the security field, but there weren't many classes on the subject, and even when I searched online, there was less information compared to other fields, which left me feeling really lost. However, through detailed and Kind lectures that even non-majors could understand, and numerous practice problems that were great for reviewing and reinforcing what I learned in the lectures, I gradually gained confidence and hope that I could work in this field. It didn't stop there - through Discord, I was able to get quick answers to questions, information about various competitions, and opportunities to form teams. Although I haven't completed all the lectures yet, I want to finish them all and achieve my dream. I'm truly grateful to have this experience at such an affordable price!

    • knockon
      Instructor

      Thank you for the detailed review :) I'll work hard to provide you with even more!

  • lillilllilllilli님의 프로필 이미지
    lillilllilllilli

    Reviews 2

    ∙

    Average Rating 5.0

    5

    100% enrolled

    It was easy to follow because you explained it step by step.

    • knockon
      Instructor

      Thank you so much for leaving a review. As the instructor, it is incredibly rewarding to hear that you felt you could follow along without pressure thanks to the step-by-step explanations. I put a lot of effort into explaining things from the basics so that the flow wouldn't be lost, and I'm even more grateful that you recognized that. I will continue to work hard to create lectures that enable students to keep learning on their own. 😁

  • abcd123123님의 프로필 이미지
    abcd123123

    Reviews 330

    ∙

    Average Rating 5.0

    4

    11% enrolled

    I'll listen a bit more for now.

    • baekseungsoo0075님의 프로필 이미지
      baekseungsoo0075

      Reviews 2

      ∙

      Average Rating 3.0

      5

      31% enrolled

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