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reversing
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web
Dreamhack
free
Sand Message
๊ณต์‹ ํ’€์ด
pwnable
Dreamhack
free
My Decryption System
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Dreamhack
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๋žญํ‚น

263๋ช…์ด ์ฐธ์—ฌ ์ค‘์ž…๋‹ˆ๋‹ค.
Last updated: 2025.01.07. 07:20:28
์ˆœ์œ„ ์ ์ˆ˜ ์‚ฌ์šฉ์ž
1์œ„ 2589 pts
wlswotmd
2024 Invitational Winners
2์œ„ 1623 pts
utaha
CTF Second Place
3์œ„ 1591 pts
wy
๋Œ€ํ‘œ ์—…์  ์—†์Œ
4์œ„ 1591 pts
D1N0
๋Œ€ํ‘œ ์—…์  ์—†์Œ
5์œ„ 1591 pts
avatar
LittleDev0617
๋ฆฌ๋ฒ„์‹ฑ ์ž…๋ฌธ
6์œ„ 1591 pts
avatar
biluv
2024 Invitational Contenders
7์œ„ 1591 pts
avatar
J0ngBae
Crazy 8
8์œ„ 966 pts
rev4fun
2024 Invitational Contenders
9์œ„ 966 pts
avatar
DGEVY
๋Œ€ํ‘œ ์—…์  ์—†์Œ
10์œ„ 625 pts
ash3r
์›Œ๊ฒŒ์ž„ ๊ณ ์ธ๋ฌผ
11์œ„ 625 pts
blazenkits
๋Œ€ํ‘œ ์—…์  ์—†์Œ
12์œ„ 625 pts
kyuheon
๋Œ€ํ‘œ ์—…์  ์—†์Œ
13์œ„ 625 pts
avatar
์—ฐ๋‹˜
๋‹ต๋ณ€ ๋“ฑ๋ก: 1
14์œ„ 625 pts
baver
CTF First Place
15์œ„ 625 pts
nemoVim
์›Œ๊ฒŒ์ž„: 20

๊ฒฐ๊ณผ

์‚ฌ์šฉ์ž
LP
๋ณ€๋™๋œ ํ‹ฐ์–ด
wlswotmd
1835
154
Platinum III
utaha
2269
256
Diamond II
wy
1855
187
Platinum III
D1N0
2148
82
Diamond III
avatar
LittleDev0617
2031
93
Platinum I
avatar
biluv
1450
134
Silver I
avatar
J0ngBae
1835
94
Platinum III
rev4fun
1887
113
Platinum III
avatar
DGEVY
1439
240
Silver I
ash3r
1995
80
Platinum II
ํƒˆํ‡ดํ•œ ์ด์šฉ์ž
1840
230
Platinum III
blazenkits
1578
Gold III
kyuheon
1574
Gold III
avatar
์—ฐ๋‹˜
1854
111
Platinum III
baver
1798
112
Gold I
nemoVim
1562
Gold III
avatar
junan
1601
105
Gold II
avatar
Zer0base
1533
133
Gold III
avatar
OSORI
1822
63
Platinum III
Scripter36
1705
172
Gold I
Winty
1856
56
Platinum III
silver35
1494
96
Silver I
sushi
1668
164
Gold II
avatar
!๋ณด๋ผ๋งค
1522
97
Gold III
avatar
UKO
1593
66
Gold III
avatar
๊ตฐ์ธ๊น€๋„ํ˜„
1411
212
Silver I
qwere36
1672
75
Gold II
avatar
mingw
1443
109
Silver I
avatar
ssongk
1758
55
Gold I
avatar
YaPoo
1699
69
Gold II
Season 4
Dreamhack CTF Season 4 Round #3 (๐ŸšฉDiv1)
์ผ์‹œ
2023.08.05. 09:00:00
~ 2023.08.05. 23:59:59
261๋ช… ์ฐธ์—ฌํ•จ
CTF ๊ฐœ์ตœ
Dreamhack
์ง„ํ–‰์‹œ๊ฐ„
15์‹œ๊ฐ„
ํŒ€ ๊ทœ๋ชจ
๊ฐœ์ธ
๊ฐœ์š”

Dreamhack CTF๋Š” ์ •๊ธฐ์ ์œผ๋กœ ๊ฐœ์ตœ๋˜๋Š” ๋Œ€ํšŒ์ž…๋‹ˆ๋‹ค.

๋ฌธ์˜

๊ทœ์น™
  1. CTF ์ฐธ๊ฐ€์ž ๊ฐ„์˜ ์ •๋‹ต ๊ณต์œ  ๋ฐ ํ’€์ด ๊ณผ์ • ๊ณต์œ ๋Š” ์—„๊ฒฉํžˆ ๊ธˆ์ง€๋˜์–ด ์žˆ์œผ๋ฉฐ, ์‹ค๊ฒฉ์˜ ๋Œ€์ƒ์ด ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
  2. CTF ์ฐธ์—ฌ์ž๋Š” ๋ฐ˜๋“œ์‹œ ๊ณต๊ฒฉ ๋Œ€์ƒ์œผ๋กœ ์ •ํ•ด์ง„ ์„œ๋ฒ„๋งŒ์„ ์ ‘์†ํ•˜๊ณ  ๊ณต๊ฒฉํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค.
  3. Dreamhack์„ ํฌํ•จํ•œ CTF ์„œ๋ฒ„ ์šด์˜์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ํ–‰์œ„ ํ˜น์€ ์›ํ™œํ•œ ์ง„ํ–‰์— ๋ฐฉํ•ด๊ฐ€ ๋  ์ˆ˜ ์žˆ๋Š” ํ–‰๋™ ๋ฐ ์‹œ๋„ ๋˜ํ•œ ์‹ค๊ฒฉ์˜ ๋Œ€์ƒ์ด ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.
๋ณด์ƒ
  • ๋“œ๋ฆผํ•ต ๊ตฟ์ฆˆ(์žฅํŒจ๋“œ)
    • ์ƒ์œ„ 1๋ช…
    • ์ถ”์ฒจ 4๋ช… (์ตœ์†Œ ํ•œ ๋ฌธ์ œ ์ด์ƒ ํ•ด๊ฒฐํ•œ ์‚ฌ๋žŒ)

์ƒํ’ˆ ์ถ”์ฒจ์€ ๋“œ๋ฆผํ•ต ๊ณต์‹ ๋””์Šค์ฝ”๋“œ ์„œ๋ฒ„ ์˜ #dh-ctf-season4 ์ฑ„๋„์—์„œ ์ง„ํ–‰ํ•ฉ๋‹ˆ๋‹ค.

โ€ป ๋“œ๋ฆผํ•ต ๋””์Šค์ฝ”๋“œ์—์„œ ์ƒํ’ˆ ์•ˆ๋‚ด๊ฐ€ ์ด๋ฃจ์–ด์ง‘๋‹ˆ๋‹ค. ์•ˆ๋‚ด๋ฅผ ํ™•์ธํ•˜์ง€ ๋ชปํ•˜์—ฌ ์ƒํ’ˆ์„ ๋ฐ›์ง€ ๋ชปํ•˜์˜€์„ ๊ฒฝ์šฐ, ์žฌ๋ฐœ์†กํ•ด ๋“œ๋ฆฌ์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

โ€ป ๋ณด์ƒ์€ ์ƒํ™ฉ์— ๋”ฐ๋ผ ๋น„์Šทํ•œ ๊ธˆ์•ก์˜ ๋‹ค๋ฅธ ์ƒํ’ˆ์œผ๋กœ ๋ฐ”๋€” ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ฑ„์ 

๊ฐ ๋ฌธ์ œ์˜ ์ ์ˆ˜๋Š” ํ’€์ด์ž ์ˆ˜์— ๋”ฐ๋ผ ์กฐ์ •๋ฉ๋‹ˆ๋‹ค.

ํ”Œ๋ž˜๊ทธ ํ˜•์‹

ํ”Œ๋ž˜๊ทธ์˜ ํ˜•์‹์€ DH{...}์ž…๋‹ˆ๋‹ค.

ํ”Œ๋ž˜๊ทธ ์ œ์ถœ ์ œํ•œ
๋ฌธ์ œ๋‹น 30์ดˆ๋งˆ๋‹ค ํ•œ ๋ฒˆ์”ฉ Flag๋ฅผ ์ œ์ถœ ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.