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A Lim Han ๋‹˜์˜ ๋ธ”๋กœ๊ทธ์ž…๋‹ˆ๋‹ค.

๊ตฌ๋…์ž
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๋ฐฉ๋ช…๋ก ๋ฐฉ๋ฌธํ•˜๊ธฐ

์ฃผ์š” ๊ธ€ ๋ชฉ๋ก

  • [MySQL & Spring Boot] ํšŒ์› ํ”„๋กœ์ ํŠธ _2~5) ์„œ๋ฒ„ ํฌํŠธ๋ฒˆํ˜ธ ์ง€์ • ~ ํšŒ์›๊ฐ€์ž… ๋กœ์ง ๊ตฌํ˜„ ๐Ÿ’™ ํšŒ์› ํ”„๋กœ์ ํŠธ _2~5) ์„œ๋ฒ„ ํฌํŠธ๋ฒˆํ˜ธ ์ง€์ •๋ถ€ํ„ฐ ํšŒ์›๊ฐ€์ž… ๋กœ์ง ๊ตฌํ˜„๊นŒ์ง€โ€ป ๋ณธ ํ”„๋กœ์ ํŠธ์™€ ๊ด€๋ จ๋œ ์ œ ๋ชจ๋“  ๊ฒŒ์‹œ๋ฌผ์€ ์ œ ๊ฐœ์ธ ๊ณต๋ถ€ ๊ธฐ๋ก ๋ชฉ์ ์œผ๋กœ ์ž‘์„ฑ๋˜์—ˆ์œผ๋ฉฐ, ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” '์ฝ”๋”ฉ๋ ˆ์‹œํ”ผ'๋‹˜์˜ [์Šคํ”„๋ง๋ถ€ํŠธ ํšŒ์› ํ”„๋กœ์ ํŠธ] ์ž…๋‹ˆ๋‹ค! -->  https://www.youtube.com/watch?v=RhM1bQ76Tv0&list=PLV9zd3otBRt5ANIjawvd-el3QU594wyx7  1. application.yml ํŒŒ์ผ์—์„œ ์•„๋ž˜ ์ฝ”๋“œ๋ฅผ ํ†ตํ•ด ์„œ๋ฒ„ ํฌํŠธ๋ฒˆํ˜ธ ์ง€์ •server: port: 80812. HomeController.java ํŒŒ์ผ์—์„œ ๊ธฐ๋ณธ ํŽ˜์ด์ง€ ์š”์ฒญ ๋ฉ”์„œ๋“œ ๊ตฌํ˜„package com.codingrecipe.member.controller;import org.springframework.ste.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2024. 5. 26.
  • [Programmers] ๊ฐ๋„๊ธฐ ํ’€์ด (feat. C++ ๋…ผ๋ฆฌ ์—ฐ์‚ฐ์ž) #๏ธโƒฃ ๊ฐ๋„๊ธฐ ํ’€์ด #include #include using namespace std; int solution(int angle) { ใ…คใ…คint answer = 0; ใ…คใ…คif (angle > 0 && angle 90 && angle < 180) ใ…คใ…ค{ // ๋‘”๊ฐ์ธ ๊ฒฝ์šฐ ใ…คใ…คใ…คใ…คreturn 3; ใ…คใ…ค} ใ…คใ…คelse if (angle == 180) ใ…คใ…ค{ // ํ‰๊ฐ์ธ ๊ฒฝ์šฐ ใ…คใ…คใ…คใ…คreturn 4; ใ…คใ…ค} ใ…คใ…คelse ใ…คใ…ค{ // ๊ทธ ์™ธ์˜ ๊ฒฝ์šฐ ใ…คใ…คใ…คใ…คreturn -1; // ์ž˜๋ชป๋œ ๊ฐ๋„๋ฅผ ๋‚˜ํƒ€๋‚ด๋Š” ๊ฒฝ์šฐ -1.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2024. 3. 23.
  • [Programmers] ๋‘ ์ˆ˜์˜ ๋‚˜๋ˆ—์…ˆ ํ’€์ด (feat. C++ ํ˜•๋ณ€ํ™˜ ์—ฐ์‚ฐ์ž) 1๏ธโƒฃ ๋‘ ์ˆ˜์˜ ๋‚˜๋ˆ—์…ˆ ํ’€์ด #include // ์ˆ˜ํ•™ ํ•จ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜๊ธฐ ์œ„ํ•ด cmath ํ—ค๋” ํŒŒ์ผ์„ ํฌํ•จ int solution(int num1, int num2) { // solution ํ•จ์ˆ˜์˜ ์ •์˜ ์‹œ์ž‘ ใ…คใ…คif(num2 == 0) // ๋งŒ์•ฝ num2๊ฐ€ 0์ด๋ฉด ใ…คใ…ค{ ใ…คใ…คใ…คใ…คreturn 0; // 0์„ ๋ฐ˜ํ™˜ (0์œผ๋กœ ๋‚˜๋ˆŒ ์ˆ˜ ์—†์Œ) ใ…คใ…ค} ใ…คใ…ค// ์†Œ์ˆ˜์ ๊นŒ์ง€ ์ •ํ™•ํ•œ ๋‚˜๋ˆ—์…ˆ์„ ์œ„ํ•ด num1์„ double๋กœ ์บ์ŠคํŒ…ํ•˜๊ณ  num2๋กœ ๋‚˜๋ˆˆ ํ›„ 1000์„ ๊ณฑํ•จ ใ…คใ…คdouble result = (static_cast(num1) / num2) * 1000; ใ…คใ…ค// ๊ฒฐ๊ณผ๋ฅผ int๋กœ ์บ์ŠคํŒ…ํ•˜์—ฌ ๋ฐ˜ํ™˜ ใ…คใ…คreturn static_cast(result); } # C++ ํ˜•๋ณ€ํ™˜ ์—ฐ์‚ฐ์ž : static_cast(๋ฐ˜ํ™˜ํ•  ๊ฐ’).. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2024. 3. 21.
  • [GitHub & Git] ๊นƒํ—ˆ๋ธŒ Organizations ์ƒ์„ฑํ•˜๊ธฐ ๐Ÿ’™ ๊นƒํ—ˆ๋ธŒ Organizations ์ƒ์„ฑํ•˜๋Š” ๋ฐฉ๋ฒ• 1. ๋ณธ์ธ ๊ณ„์ •์œผ๋กœ ๋กœ๊ทธ์ธ --> ์šฐ์ธก ์ƒ๋‹จ์˜ ํ”„๋กœํ•„ ์ด๋ฏธ์ง€ ํด๋ฆญ 2. 'Your organizations' ํด๋ฆญ 3. ์šฐ์ธก ์ƒ๋‹จ์˜ 'New organization' ํด๋ฆญ 4. Organization ์š”๊ธˆ์ œ ์„ ํƒ 5. Organization ์ •๋ณด ์ž…๋ ฅ ํ›„ 'Next' ๋ฒ„ํŠผ ํด๋ฆญ --> ํŒ€ ๊ตฌ์„ฑ์› ์ดˆ๋Œ€ 5. Organization ์ƒ์„ฑ ์™„๋ฃŒ ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2024. 3. 17.
  • [Baekjoon] 1001๋ฒˆ_A-B ํ’€์ด(C99) ๐ŸงŸ‍โ™€๏ธ 1001๋ฒˆ_A-B ํ’€์ด(C99) #include int main() { ใ…คใ…คint A, B; ใ…คใ…ค// ๋‘ ์ •์ˆ˜ A์™€ B๋ฅผ ์ž…๋ ฅ๋ฐ›๊ธฐ ใ…คใ…คscanf("%d %d", &A, &B); ใ…คใ…ค// A์™€ B์˜ ์ฐจ๋ฅผ ์ถœ๋ ฅํ•˜๊ธฐ ใ…คใ…คprintf("%d\n", A - B); ใ…คใ…คreturn 0; } ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 30.
  • [Baekjoon] 1000๋ฒˆ_A+B ํ’€์ด(C99) ๐Ÿชฐ 1000๋ฒˆ_A+B ํ’€์ด(C99) #include int main() { ใ…คใ…คint A, B; ใ…คใ…ค// ๋‘ ์ •์ˆ˜ A์™€ B๋ฅผ ์ž…๋ ฅ๋ฐ›๊ธฐ ใ…คใ…คscanf("%d %d", &A, &B); ใ…คใ…ค// A์™€ B์˜ ํ•ฉ์„ ์ถœ๋ ฅํ•˜๊ธฐ ใ…คใ…คprintf("%d\n", A + B); ใ…คใ…คreturn 0; } ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 29.
  • [Dreamhack] littlevsbig Write Up โš ๏ธ littlevsbig Write Up 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋ฌธ์ œ ํŒŒ์ผ ์† chall.c ์˜คํ”ˆ ํ›„ ์ฝ”๋“œ ๋ถ„์„ --> FLAG ์ถœ๋ ฅ ์กฐ๊ฑด ๋ฐœ๊ฒฌ // Name: chall.c // Compile Option: gcc chall.c -o chall -fno-stack-protector #include #include #include #include #include #include #define FLAG_SIZE 0x45 void alarm_handler() { ใ…คใ…คputs("TIME OUT"); ใ…คใ…คexit(-1); } void initialize() { ใ…คใ…คsetvbuf(stdin, NULL, _IONBF, 0); ใ…คใ…คsetvbuf(stdout, NULL, _IONBF, 0); ใ…คใ…คsi.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 28.
  • [Dreamhack] dreamhack-tools-cyberchef Write Up ๐ŸŒš dreamhack-tools-cyberchef Write Up 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋‹ค์šด๋ฐ›์€ ํŒŒ์ผ ์† index.html ์œผ๋กœ ์ ‘์† --> ์•”ํ˜ธ๋ฌธ๊ณผ ์•”ํ˜ธํ™” ์ˆœ์„œ ๋ฐœ๊ฒฌ # ์•”ํ˜ธํ™” ์ˆœ์„œ : Rail Fence → Base64 → ROT13 # ๋ณตํ˜ธํ™” ์ˆœ์„œ : ROT13 → Base64 → Rail Fence 3. ๋ฌธ์ œ์— ๋ช…์‹œ๋œ Cyberchef ์œผ๋กœ ์ ‘์† ++ Dreamhack Cyberchef --> https://tools.dreamhack.games/cyberchef dreamhack-tools tools.dreamhack.games 4. ๋ณตํ˜ธํ™” ์ˆœ์„œ์— ๋”ฐ๋ผ ์•”ํ˜ธ๋ฌธ ์ฐจ๋ก€๋กœ ๋ณตํ˜ธํ™” --> FLAG ๋ฐœ๊ฒฌ # Input : EUg5MJAyYJ9fYJ5iMKqio29iVK1VL2Wl.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 27.
  • [Dreamhack CTF Season 3] ROT128 Write Up ๐Ÿชฎ ROT128 Write Up 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋‹ค์šด๋ฐ›์€ rot128.py ํŒŒ์ผ ์˜คํ”ˆ ํ›„ ์ฝ”๋“œ ๋ถ„์„ โ‘  hex_list ์ดˆ๊ธฐํ™” hex_list = [(hex(i)[2:].zfill(2).upper()) for i in range(256)] ์ฝ”๋“œ ์„ค๋ช… range(256) 0๋ถ€ํ„ฐ 255๊นŒ์ง€์˜ ์ˆซ์ž ์ƒ์„ฑ hex(i) ์ •์ˆ˜ i๋ฅผ 16์ง„์ˆ˜ ๋ฌธ์ž์—ด๋กœ ๋ณ€ํ™˜ [2:] '0x' ์ œ๊ฑฐ ๋‚˜๋จธ์ง€ ๋ถ€๋ถ„์„ ๊ฐ€์ ธ์˜ด zfill(2) ๋ฌธ์ž์—ด์˜ ๊ธธ์ด๋ฅผ 2๋กœ ์„ค์ • upper() ํ•ด๋‹น ๋‚ด์šฉ ๋Œ€๋ฌธ์ž๋กœ ๋ณ€ํ™˜ โ‘ก ์›๋ณธ flag.png ํŒŒ์ผ ์ฝ๊ธฐ with open('flag.png', 'rb') as f: ใ…คใ…คplain_s = f.read() ++ flag.png ํŒŒ์ผ์„ ์ด์ง„ ๋ชจ๋“œ('rb': read binary)๋กœ .. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 1 2023. 11. 26.
  • [Dreamhack] Exercise: Welcome-Beginners ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด ๐Ÿšบ Exercise: Welcome-Beginners ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ์„œ๋ฒ„ ์ƒ์„ฑ 2. ์ƒ์„ฑํ•œ ์„œ๋ฒ„๋กœ ์ ‘์†ํ•˜๊ธฐ ์ „, ๋ฌธ์ œ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ ํ›„ ์˜คํ”ˆ 3. ์‚ฌ์šฉ์ž๋กœ๋ถ€ํ„ฐ ์ž…๋ ฅ๋ฐ›์€ ๊ฐ’์ด "Dreamhack" ์ธ ๊ฒฝ์šฐ FLAG๋ฅผ ์ถœ๋ ฅํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ char cmp_str[10] = "Dreamhack"; char inp_str[10]; printf("Enter \"Dreamhack\" : "); scanf("%9s", inp_str); if(strcmp(cmp_str, inp_str) == 0){ ใ…คใ…คputs("Welcome Beginners!"); ใ…คใ…ค// print flag ใ…คใ…คputs(flag); } 4. Ubuntu ๊ฐ€์ƒํ™˜๊ฒฝ์—์„œ nc ๋ช…๋ น์–ด๋ฅผ ํ†ตํ•ด ์„œ๋ฒ„ ์ ‘์† --> "Drea.. ๊ณต๊ฐ์ˆ˜ 1 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 25.
  • [Dreamhack] ex-reg-ex ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด ๐Ÿคธ‍โ™€๏ธ ex-reg-ex ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ์„œ๋ฒ„ ์ƒ์„ฑ 2. ์ƒ์„ฑํ•œ ์„œ๋ฒ„๋กœ ์ ‘์†ํ•œ ๋’ค ์ž„์˜์˜ ๊ฐ’ ์ž…๋ ฅ --> Input ๊ฐ’์ด ๊ทธ๋Œ€๋กœ ์ถœ๋ ฅ๋จ์„ ํ™•์ธ 3. ๋ฌธ์ œ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ ํ›„ app.py ์˜คํ”ˆ #!/usr/bin/python3 from flask import Flask, request, render_template import re app = Flask(__name__) try: ใ…คใ…คFLAG = open("./flag.txt", "r").read() # flag is here! except: ใ…คใ…คFLAG = "[**FLAG**]" @app.route("/", methods = ["GET", "POST"]) def index(): ใ…คใ…คinput_val = "" ใ…คใ…คif re.. ๊ณต๊ฐ์ˆ˜ 2 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 24.
  • [Dreamhack] baby-linux ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด ๐Ÿคฑ baby-linux ๋“œ๋ฆผํ•ต ์›Œ๊ฒŒ์ž„ ๋ฌธ์ œ ํ’€์ด 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ์„œ๋ฒ„ ์ƒ์„ฑ 2. ์ƒ์„ฑํ•œ ์„œ๋ฒ„๋กœ ์ ‘์† --> ls ๋ช…๋ น์–ด๋ฅผ ์ž…๋ ฅํ•˜์—ฌ ํ˜„์กดํ•˜๋Š” ํŒŒ์ผ ๋ชฉ๋ก ์ถœ๋ ฅ 3. cat ๋ช…๋ น์–ด๋ฅผ ํ†ตํ•ด requirements.txt ํŒŒ์ผ ์˜คํ”ˆ --> ๋ณ„๋‹ค๋ฅธ ํžŒํŠธ๋ฅผ ๋ฐœ๊ฒฌํ•˜์ง€ ๋ชปํ•จ 4. cat ๋ช…๋ น์–ด๋ฅผ ํ†ตํ•ด hint.txt ํŒŒ์ผ ์˜คํ”ˆ --> FLAG์˜ ๊ฒฝ๋กœ ๋ฐœ๊ฒฌ 5. ๋‹ค์‹œ cat ๋ช…๋ น์–ด๋ฅผ ์ด์šฉํ•ด hello ํŒŒ์ผ์— ์ ‘๊ทผ ์‹œ๋„ --> No! ๋ฌธ์ž์—ด๊ณผ ํ•จ๊ป˜ ์ ‘๊ทผ ๊ฑฐ๋ถ€ echo $(cat ./dream/hack/hello/flag.txt) 6. app.py ํŒŒ์ผ์„ ์—ด์–ด ์†Œ์Šค์ฝ”๋“œ ํ™•์ธ 7. app.py ์ฝ”๋“œ ํ™•์ธ --> Line 13์—์„œ 'flag' ์šฉ์–ด ํ•„ํ„ฐ๋ง ์š”์†Œ ๋ฐœ๊ฒฌ #!/usr/bin/env python3 import .. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 23.
  • [Dreamhack] rev-basic-2 WriteUp ๐Ÿœ rev-basic-2 WriteUp 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋‹ค์šด๋ฐ›์€ ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์‹คํ–‰ ํ›„ ์ž„์˜์˜ ๋ฌธ์ž์—ด ์ž…๋ ฅ --> Enter ์„ ํด๋ฆญํ•˜๋‹ˆ ํ”„๋กœ๊ทธ๋žจ์ด ์ข…๋ฃŒ๋จ์„ ํ™•์ธ 3. x64dbg๋ฅผ ํ†ตํ•ด ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์˜คํ”ˆ 4. ์ƒ๋‹จ์˜ '๊ธฐํ˜ธ' ํƒญ์—์„œ 'chall2.exe' ํด๋ฆญ 5. ์œ„์—์„œ๋ถ€ํ„ฐ ํƒ์ƒ‰ --> ๋ฌธ์ž์—ด์„ RCX ๋ ˆ์ง€์Šคํ„ฐ์— ์ž…๋ ฅ๋œ ๊ฐ’๊ณผ ๋ฐ˜๋ณต์ ์œผ๋กœ ๋น„๊ตํ•˜๋Š” ๊ตฌ๊ฐ„ ๋ฐœ๊ฒฌ 6. Hex dump ์—์„œ ๋น„๊ต๋˜๋Š” 7FF7B8F73000 ์ฃผ์†Œ ๊ฐ’ ํ™•์ธ --> ์ •๋‹ต ๋ฌธ์ž์—ด ๋ฐœ๊ฒฌ # ์•Œ์•„๋‚ธ FLAG : DH{Comp4re_the_arr4y} 7. ์•Œ์•„๋‚ธ FLAG ๊ฐ’ ์ž…๋ ฅ --> ๋ฌธ์ œ ํ•ด๊ฒฐ ์„ฑ๊ณต ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 22.
  • [Dreamhack] rev-basic-1 WriteUp โ˜‚๏ธ rev-basic-1 WriteUp 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋‹ค์šด๋ฐ›์€ ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์‹คํ–‰ ํ›„ ์ž„์˜์˜ ๋ฌธ์ž์—ด ์ž…๋ ฅ --> Enter ์„ ํด๋ฆญํ•˜๋‹ˆ ํ”„๋กœ๊ทธ๋žจ์ด ์ข…๋ฃŒ๋จ์„ ํ™•์ธ 3. x64dbg๋ฅผ ํ†ตํ•ด ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์˜คํ”ˆ 4. ์ƒ๋‹จ์˜ '๊ธฐํ˜ธ' ํƒญ์—์„œ 'chall1.exe' ํด๋ฆญ 5. ์ž…๋ ฅ๋ฐ›์€ ๋ฌธ์ž์—ด์„ ์ •๋‹ต๊ณผ ๋น„๊ตํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ --> ์ •๋‹ต์€ "DH{Compar3_the_ch4ract3r}" 6. ๋ฐœ๊ฒฌํ•œ FLAG ์ž…๋ ฅ --> ๋ฌธ์ œ ํ•ด๊ฒฐ ์„ฑ๊ณต ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 20.
  • [Dreamhack] rev-basic-0 WriteUp ๐Ÿ™ rev-basic-0 WriteUp 1. ๋ฌธ์ œ ์„ค๋ช… ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. ๋‹ค์šด๋ฐ›์€ ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์‹คํ–‰ ํ›„ ์ž„์˜์˜ ๋ฌธ์ž์—ด ์ž…๋ ฅ --> Enter ์„ ํด๋ฆญํ•˜๋‹ˆ ํ”„๋กœ๊ทธ๋žจ์ด ์ข…๋ฃŒ๋จ์„ ํ™•์ธ 3. IDA ๋ฅผ ํ†ตํ•ด ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ์˜คํ”ˆ 4. ๋ฌธ์ž์—ด ๊ฒ€์ƒ‰ ๊ธฐ๋Šฅ์„ ํ†ตํ•ด 'Correct' ๋ฉ”์‹œ์ง€ ๊ฒ€์ƒ‰ --> Wrong & Correct ๋ฉ”์‹œ์ง€ ๋ฐœ๊ฒฌ 5. ์œ„๋กœ ์Šคํฌ๋กคํ•˜๋‹ˆ ์ž…๋ ฅ๋ฐ›์€ ๋ฌธ์ž์—ด์„ ์ •๋‹ต๊ณผ ๋น„๊ตํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ --> ์ •๋‹ต์€ "Compar3_the_str1ng" 6. ๋ฐœ๊ฒฌํ•œ FLAG ์ž…๋ ฅ --> ๋ฌธ์ œ ํ•ด๊ฒฐ ์„ฑ๊ณต ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 19.
  • [Reverse Engineering] CodeEngn Advance RCE L01 WriteUp ๐Ÿฅซ CodeEngn Advance RCE L01 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œํ•œ ํ›„ Detect It Easy ๋ฅผ ํ†ตํ•ด ํŒŒ์ผ ์˜คํ”ˆ --> ํŒŒ์ผ์ด UPX ํ˜•์‹์œผ๋กœ ํŒจํ‚น๋˜์–ด์žˆ์Œ์„ ํ™•์ธ ++ ์•„์ง Detect It Easy ๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์•˜๋‹ค๋ฉด? --> https://www.majorgeeks.com/ MajorGeeks.Com - MajorGeeks www.majorgeeks.com 3. ํŒจํ‚น๋œ ์ƒํƒœ์ธ 01 ํŒŒ์ผ์— ๋Œ€ํ•˜์—ฌ ์–ธํŒจํ‚น ์ง„ํ–‰ ++ UPX ํŒจํ‚น๋œ ํŒŒ์ผ ์–ธํŒจํ‚นํ•˜๊ธฐ --> https://alim11.tistory.com/456 [UPX Un/Packer] UPX ํŒจํ‚น๋œ ํŒŒ์ผ ์–ธํŒจํ‚นํ•˜๊ธฐ ๐Ÿงฎ UPX ํŒจํ‚น๋œ ์ƒํƒœ์˜ ํŒŒ์ผ์„ ์–ธํŒจํ‚น.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 18.
  • [Reverse Engineering] CodeEngn Basic RCE L19 WriteUp ๐Ÿ’’ CodeEngn Basic RCE L19 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 19 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. ๊ด€๋ จ ์ •๋ณด ์ˆ˜์ง‘์„ ์œ„ํ•ด Detect It Easy ๋ฅผ ํ†ตํ•ด ํŒŒ์ผ ์˜คํ”ˆ --> ํŒŒ์ผ์ด UPX ํ˜•์‹์œผ๋กœ ํŒจํ‚น๋˜์–ด์žˆ์Œ์„ ํ™•์ธ ++ ์•„์ง Detect It Easy ๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์•˜๋‹ค๋ฉด? --> https://www.majorgeeks.com/ MajorGeeks.Com - MajorGeeks www.majorgeeks.com 4. ํŒจํ‚น๋œ ์ƒํƒœ์ธ 19 ํŒŒ์ผ์— ๋Œ€ํ•˜์—ฌ ์–ธํŒจํ‚น ์ง„ํ–‰ ++ UPX ํŒจํ‚น๋œ ํŒŒ์ผ ์–ธํŒจํ‚นํ•˜๊ธฐ --> https://alim11.tistory.com/456 [UPX Un/Packer] UPX .. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 17.
  • [Reverse Engineering] CodeEngn Basic RCE L18 WriteUp ๐Ÿคก CodeEngn Basic RCE L18 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 18 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 18.exe ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’ ์ž…๋ ฅ ํ›„ "Check" ํด๋ฆญ --> Serial ๊ฐ’์ด ํ‹€๋ ธ๋‹ค๋Š” ๊ฒฝ๊ณ ๋ฌธ ํ™•์ธ 4. Immunity Debugger ์„ ํ†ตํ•ด 18.exe ํŒŒ์ผ ์˜คํ”ˆ --> ์„ฑ๊ณต & ์‹คํŒจ ๋ฉ”์‹œ์ง€์™€ OR ์—ฐ์‚ฐ๋ฌธ ๋ฐœ๊ฒฌ 5. ๋ฐœ๊ฒฌํ•œ OR ์—ฐ์‚ฐ๋ฌธ๊ณผ ๊ทธ ์•„๋ž˜ ๋ถ€๋ถ„์— BreakPoint ์„ค์ • --> Debug ์‹คํ–‰ 6. ํŒ์—…์ฐฝ์— ์•„๋ž˜์™€ ๊ฐ™์ด ์ž…๋ ฅ ํ›„ Check ๋ฒ„ํŠผ ํด๋ฆญ --> "CodeEngn" ์˜ Serial ๋ฐœ๊ฒฌ # ์ž…๋ ฅํ•œ Serial : 1234 # ์ž…๋ ฅํ•œ Name : CodeEngn # ๋ฐœ๊ฒฌ.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 1 2023. 11. 16.
  • [Reverse Engineering] CodeEngn Basic RCE L17 WriteUp ๐ŸŽฏ CodeEngn Basic RCE L17 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 17 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 17.exe ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’ ์ž…๋ ฅ ํ›„ "Check it!" ํด๋ฆญ --> "Please Enter More Chars..." ์ด๋ผ๋Š” ๊ฒฝ๊ณ ๋ฌธ ํ™•์ธ 4. Immunity Debugger ์„ ํ†ตํ•ด 17.exe ํŒŒ์ผ ์˜คํ”ˆ --> ์„ฑ๊ณต & ์‹คํŒจ ๋ฉ”์‹œ์ง€์™€ ๋น„๊ต๋ฌธ ๋ฐœ๊ฒฌ 5. ๋ฐœ๊ฒฌํ•œ ๋น„๊ต๋ฌธ์„ 03 --> 01๋กœ ๋ณ€๊ฒฝ 6. ์‹คํŒจ๋ฌธ๊ณผ ๊ทธ ์•„๋ž˜ BreakPoint ์„ค์ • --> ํŒจ์น˜ ์‚ฌํ•ญ ์ €์žฅ 7. Debugging ์‹คํ–‰ ํ›„ ASCII ์‹œ๋ฆฌ์–ผ์ด ์ƒ์„ฑ๋œ ๊ฒƒ์„ ํ™•์ธ 8. 17.0045B850 ํ•จ์ˆ˜์— BreakPoint ์„ค์ •.. ๊ณต๊ฐ์ˆ˜ 1 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 15.
  • [Reverse Engineering] CodeEngn Basic RCE L16 WriteUp ๐Ÿ‘บ CodeEngn Basic RCE L16 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 16 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 16.exe ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’ ์ž…๋ ฅ ํ›„ "Enter" ํด๋ฆญ --> "Wrong password!" ์ด๋ผ๋Š” ๊ฒฝ๊ณ ๋ฌธ ํ™•์ธ 4. Immunity Debugger ์„ ํ†ตํ•ด 16.exe ํŒŒ์ผ ์˜คํ”ˆ 5. ์„ฑ๊ณต ๋ฌธ์ž์—ด๊ณผ ์‹คํŒจ ๋ฌธ์ž์—ด๋กœ ๋ถ„๊ธฐํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ --> ๋ถ„๊ธฐ ๋ถ€๋ถ„๊ณผ ๊ทธ ์•„๋ž˜ BreakPoint ์„ค์ • 6. Debugging ์‹คํ–‰ ํ›„ ๋ ˆ์ง€์Šคํ„ฐ ๊ฐ’ ํ™•์ธ # EAX ๋ ˆ์ง€์Šคํ„ฐ : 000004D2 # EBP ๋ ˆ์ง€์Šคํ„ฐ : 0070FF28 7. ๋ฐœ๊ฒฌํ•œ ์‚ฌ์‹ค๋“ค์„ ๊ธฐ๋ฐ˜์œผ๋กœ Password ํƒ์ƒ‰ --> ํŒจ์Šค์›Œ๋“œ๊ฐ€ E4C60.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 14.
  • [Debugging & Assembly] DnSpy ํˆด ๋‹ค์šด๋กœ๋“œ ๋ฐ ์‚ฌ์šฉ ๋ฐฉ๋ฒ• ๐Ÿ‘พ DnSpy ๋ž€? DnSpy๋Š” .NET ์–ด์…ˆ๋ธ”๋ฆฌ ํŽธ์ง‘ ๋ฐ ๋””๋ฒ„๊น… ๋„๊ตฌ๋กœ, .NET ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ์˜ ์–ด์…ˆ๋ธ”๋ฆฌ ์ฝ”๋“œ ํŽธ์ง‘ ๊ธฐ๋Šฅ์„ ์ œ๊ณตํ•œ๋‹ค. DnSpy๋Š” ์˜คํ”ˆ ์†Œ์Šค ํ”„๋กœ์ ํŠธ๋กœ .NET ์• ํ”Œ๋ฆฌ์ผ€์ด์…˜์˜ ๋‚ด๋ถ€ ๋™์ž‘์„ ์ดํ•ด & ์ˆ˜์ •ํ•˜๋Š” ๋ฐ ์ฃผ๋กœ ์‚ฌ์šฉํ•˜๋ฉฐ, ๋””๋ฒ„๊น…๊ณผ ์—ญ์ปดํŒŒ์ผ๋ง์„ ์œ„ํ•œ ๋‹ค์–‘ํ•œ ๊ธฐ๋Šฅ๋„ ์ œ๊ณตํ•œ๋‹ค. ๐Ÿ‘พ DnSpy ํˆด ๋‹ค์šด๋กœ๋“œ ๋ฐ ์‚ฌ์šฉ ๋ฐฉ๋ฒ• 1. ์•„๋ž˜ ๋งํฌ๋กœ ์ ‘์†ํ•˜์—ฌ ๋ณธ์ธ์˜ ํ™˜๊ฒฝ์— ๋งž๋Š” ๋ฒ„์ „ ์„ค์น˜ --> https://github.com/dnSpy/dnSpy/releases Releases · dnSpy/dnSpy .NET debugger and assembly editor. Contribute to dnSpy/dnSpy development by creating an account on GitHub. git.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 2 2023. 11. 13.
  • [UWSP Pointer Overflow CTF 2023] Unquestioned and Unrestrained Write Up ๐Ÿ‘จ‍๐Ÿ’ผ Unquestioned and Unrestrained Write Up 1. ๋ฌธ์ œ ์ˆ™์ง€ ํ›„ ์•”ํ˜ธ๋ฌธ ํ™•์ธ + ์•”ํ˜ธํ™” ๋ฐฉ์‹๊ณผ ํ‰๋ฌธ์„ ์•Œ๋ ค์ฃผ์ง€ ์•Š์€ ์ƒํƒœ์—์„œ ์•”ํ˜ธ๋ฌธ๋งŒ์„ ๋ณด๊ณ  ํ‰๋ฌธ์„ ์œ ์ถ”ํ•˜๋Š” ๋ฌธ์ œ ++ ์œ ์ผํ•œ ํžŒํŠธ๋Š” ๋ณดํŽธ์ ์ธ ์•”ํ˜ธํ™” ๋ฐฉ์‹์ด๋ผ๋Š” ๊ฒƒ! 2. ๊ฐ ์•”ํ˜ธํ™” ๋ฐฉ์‹์— ๋”ฐ๋ผ ๋ณตํ˜ธํ™”ํ•˜๊ธฐ ์œ„ํ•œ Python ์Šคํฌ๋ฆฝํŠธ ์ž‘์„ฑ # Base64 import base64 def base64_decode(encoded_text): ใ…คใ…คdecoded_bytes = base64.b64decode(encoded_text) ใ…คใ…คdecoded_text = decoded_bytes.decode('utf-8') ใ…คใ…คreturn decoded_text # ์ฃผ์–ด์ง„ ์•”ํ˜ธ๋ฌธ์— ๋Œ€ํ•ด Base64 ๋””์ฝ”๋”ฉ ์‹œ๋„ ciphertext = "cG9j.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 12.
  • [Cake CTF 2023] Country DB - 92 Write Up ๐Ÿ›น Country DB - 92 Write Up 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ์ฝ”๋“œ ๊ฒ€์ƒ‰ ๋งํฌ๋กœ ์ ‘์† ++ 'CA' ์™€ 'KE' ์— ํ•ด๋‹นํ•˜๋Š” ๋‚˜๋ผ ์ด๋ฆ„์„ ์ฐพ์œผ๋ผ๋Š” ๋“ฏ 2. ์ฝ”๋“œ ๊ฒ€์ƒ‰ ๋งํฌ์—์„œ ๊ฐ ์ฝ”๋“œ์— ๋Œ€ํ•œ ๊ตญ๊ฐ€ ํ™•์ธ 3. FLAG ์–‘์‹์— ๋งž๊ฒŒ ์ž‘์„ฑ ํ›„ ์ œ์ถœ --> ๋ฌธ์ œ๊ฐ€ ํ•ด๊ฒฐ๋˜์ง€ ์•Š์Œ 4. ํ˜น์‹œ ์ฒจ๋ถ€ ํŒŒ์ผ์— ํžŒํŠธ๊ฐ€ ์žˆ์„๊นŒ ์‹ถ์–ด ์ฒจ๋ถ€ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 5. ํŒŒ์ผ ํƒ์ƒ‰ --> ์ฝ”๋“œ ๊ฒ€์ƒ‰ ์‚ฌ์ดํŠธ ์ƒ์„ฑ์„ ์œ„ํ•œ ํŒŒ์ผ๋กœ ์ถ”์ • 6. ํŒŒ์ผ์„ ๋ชจ๋‘ ์‚ดํŽด๋ณด์•˜์œผ๋‚˜ ์ถ”๊ฐ€์ ์ธ ํžŒํŠธ๋ฅผ ์–ป์ง€ ๋ชปํ•จ --> ๋ฌธ์ œ ํ•ด๊ฒฐ ์‹คํŒจ ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 11.
  • [Reverse Engineering] CodeEngn Basic RCE L15 WriteUp ๐Ÿ“Œ CodeEngn Basic RCE L15 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 15 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 15.exe ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’ ์ž…๋ ฅ ํ›„ "Check it!" ๋ฒ„ํŠผ ํด๋ฆญ --> "Try Again!" ์ด๋ผ๋Š” ํŒ์—…์ฐฝ ํ™•์ธ 4. Immunity Debugger ์„ ํ†ตํ•ด 15 ํŒŒ์ผ ์˜คํ”ˆ 5. ์„ฑ๊ณต ๋ฌธ์ž์—ด๊ณผ ์‹คํŒจ ๋ฌธ์ž์—ด๋กœ ๋ถ„๊ธฐํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ --> ๋ถ„๊ธฐ ๋ถ€๋ถ„๊ณผ ๊ทธ ์•„๋ž˜ BreakPoint ์„ค์ • 6. Debugging ์‹คํ–‰ ํ›„ ๋ ˆ์ง€์Šคํ„ฐ ๊ฐ’ ํ™•์ธ # EAX ๋ ˆ์ง€์Šคํ„ฐ : 00000457 # 45B844 Address : 0x6160 ++ ์•Œ ์ˆ˜ ์žˆ๋Š” ์‚ฌ์‹ค : "CodeEngn" ์— ๋Œ€ํ•œ Serial ๊ฐ’ ==.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 10.
  • [Reverse Engineering] CodeEngn Basic RCE L14 WriteUp โ›ฑ๏ธ CodeEngn Basic RCE L14 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 14 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 14.exe ํŒŒ์ผ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’์„ ์ž…๋ ฅํ•œ ํ›„ "Check" ํด๋ฆญ --> Serial ์ด ํ‹€๋ ธ๋‹ค๋Š” ์•ˆ๋‚ด๋ฌธ์ด ์ถœ๋ ฅ 4. ๊ด€๋ จ ์ •๋ณด ์ˆ˜์ง‘์„ ์œ„ํ•ด Detect It Easy ๋ฅผ ํ†ตํ•ด ํŒŒ์ผ ์˜คํ”ˆ --> ํŒŒ์ผ์ด UPX ํ˜•์‹์œผ๋กœ ํŒจํ‚น๋˜์–ด์žˆ์Œ์„ ํ™•์ธ ++ ์•„์ง Detect It Easy ๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์•˜๋‹ค๋ฉด? --> https://www.majorgeeks.com/ MajorGeeks.Com - MajorGeeks www.majorgeeks.com 5. ํŒจํ‚น๋œ ์ƒํƒœ์ธ 14 ํŒŒ์ผ์— ๋Œ€ํ•˜์—ฌ ์–ธํŒจํ‚น ์ง„ํ–‰ ++ UP.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 10.
  • [Reverse Engineering] CodeEngn Basic RCE L13 WriteUp ๐Ÿ CodeEngn Basic RCE L13 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 13 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 13.exe ํŒŒ์ผ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’์„ ์ž…๋ ฅํ•œ ํ›„ "Enter" ํด๋ฆญ --> ํŒจ์Šค์›Œ๋“œ๊ฐ€ ํ‹€๋ ธ๋‹ค๋Š” ์•ˆ๋‚ด๋ฌธ์ด ์ถœ๋ ฅ 4. ๊ด€๋ จ ์ •๋ณด ์ˆ˜์ง‘์„ ์œ„ํ•ด Detect It Easy ๋ฅผ ํ†ตํ•ด ํŒŒ์ผ ์˜คํ”ˆ --> ํŒŒ์ผ์ด .NET ํ˜•์‹์ž„์„ ํ™•์ธ 5. ํŒŒ์ผ ๋ถ„์„์„ ์œ„ํ•ด dnspy ๋‹ค์šด๋กœ๋“œ ++ dnspy ๋‹ค์šด๋กœ๋“œ ๋ฐฉ๋ฒ•์ด ๊ถ๊ธˆํ•˜๋‹ค๋ฉด? --> https://alim11.tistory.com/484 [Debugging & Assembly] DnSpy ํˆด ๋‹ค์šด๋กœ๋“œ ๋ฐ ์‚ฌ์šฉ ๋ฐฉ๋ฒ• ๐Ÿ‘พ DnSpy ๋ž€? DnSpy๋Š” .NET ์–ด์…ˆ๋ธ”๋ฆฌ ํŽธ์ง‘.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 10.
  • [Reverse Engineering] CodeEngn Basic RCE L12 WriteUp ๐Ÿ’ฅ CodeEngn Basic RCE L12 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 12 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. 12.exe ํŒŒ์ผ์„ ์‹คํ–‰ํ•˜์—ฌ ์ž„์˜์˜ ๊ฐ’์„ ์ž…๋ ฅํ•œ ํ›„ "Check" ๋ฒ„ํŠผ ํด๋ฆญ --> ์•„๋ฌด ์ผ๋„ ์ผ์–ด๋‚˜์ง€ ์•Š์Œ์„ ํ™•์ธ 4. 12.exe ํŒŒ์ผ์„ Immunity Debugger ์—์„œ ์‹คํ–‰ 5. ์Šคํฌ๋กค์„ ๋‚ด๋ฆฌ๋‹ค๋ณด๋‹ˆ, ์‚ฌ์šฉ์ž๋กœ๋ถ€ํ„ฐ ์ž…๋ ฅ๋ฐ›์€ Key ๊ฐ’์„ ์ง„์งœ Key ๊ฐ’๊ณผ ๋น„๊ตํ•˜๋Š” ๋ถ€๋ถ„ ๋ฐœ๊ฒฌ ++ ์œ ์ถ” ๊ฐ€๋Šฅํ•œ ์‚ฌ์‹ค๋“ค # ์ง„์งœ Key ๊ฐ’ : 7A2896BF # ์‚ฌ์šฉ์ž๊ฐ€ ์ž…๋ ฅํ•œ Key ๊ฐ’ : EAX ๋ ˆ์ง€์Šคํ„ฐ์— ์ €์žฅ 6. ๋‹ค์‹œ 12.exe ํŒŒ์ผ์„ ๋”๋ธ”ํด๋ฆญํ•˜์—ฌ ๋ฐœ๊ฒฌํ•œ ์ง„์งœ Key ๊ฐ’ ์ž…๋ ฅ --> ๋ฌธ์ œ๊ฐ€ ์„ฑ๊ณต์ ์œผ๋กœ ํ•ด๊ฒฐ๋˜์—ˆ.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 9.
  • [Reverse Engineering] CodeEngn Basic RCE L11 WriteUp ๐Ÿ…ฑ๏ธ CodeEngn Basic RCE L11 WriteUp 1. ๋ฌธ์ œ ํ™•์ธ ํ›„ ํŒŒ์ผ ๋‹ค์šด๋กœ๋“œ 2. 7-Zip File Manager ์„ ํ†ตํ•ด ํŒŒ์ผ ์••์ถ• ํ•ด์ œ --> 11 ํŒŒ์ผ ์† ์‘์šฉ ํ”„๋กœ๊ทธ๋žจ ๋ฐœ๊ฒฌ 3. ๊ด€๋ จ ์ •๋ณด ์ˆ˜์ง‘์„ ์œ„ํ•ด Detect It Easy ๋ฅผ ํ†ตํ•ด ํŒŒ์ผ ์˜คํ”ˆ --> ํŒŒ์ผ์ด UPX ํ˜•์‹์œผ๋กœ ํŒจํ‚น๋˜์–ด์žˆ์Œ์„ ํ™•์ธ ++ ์•„์ง Detect It Easy ๋ฅผ ์„ค์น˜ํ•˜์ง€ ์•Š์•˜๋‹ค๋ฉด? --> https://www.majorgeeks.com/ MajorGeeks.Com - MajorGeeks www.majorgeeks.com 4. ํŒจํ‚น๋œ ์ƒํƒœ์ธ 11 ํŒŒ์ผ์— ๋Œ€ํ•˜์—ฌ ์–ธํŒจํ‚น ์ง„ํ–‰ ++ UPX ํŒจํ‚น๋œ ํŒŒ์ผ ์–ธํŒจํ‚นํ•˜๊ธฐ --> https://alim11.tistory.com/456 [UPX Un/Packer] UPX.. ๊ณต๊ฐ์ˆ˜ 0 ๋Œ“๊ธ€์ˆ˜ 0 2023. 11. 7.
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