search-no-result
Please log in to see the challenges!

Writeups

search-no-result
No results found.

Ranking

914 players are participating.
Last updated: 2026.07.22. 00:45:42
Rank Score User
#1 3029 pts
#2 3021 pts
#3 2645 pts
#4 2539 pts
#5 2539 pts
#6 2524 pts
#7 2520 pts
#8 2513 pts
#9 2509 pts
#10 2424 pts
#11 2424 pts
#12 2147 pts
#13 2147 pts
#14 2147 pts
#15 2147 pts

Announcements 5

  • writeup은 한국어 또는 영어로 작성해주시기를 바랍니다.
  • 공지사항이 다소 모호했던 부분이 있어 알려드립니다. writeup을 전송하는 이메일이 드림핵 가입 이메일과 같은 필요는 없습니다. dreamhack+di2026@dreamhack.io로만 반드시 전송해주시면 괜찮습니다.

  • Please do write the writeup in Korean or English.
  • We would like to clarify a point that may have been ambiguous in the announcement. The email address used to submit the writeup does not need to be the same as the one registered with Dreamhack. As long as you send the writeup to dreamhack+di2026@dreamhack.io, it will be accepted.

[예선 종료 안내]

예선 대회가 종료되었습니다! 모두 열심히 참여해주시느라 정말 고생많으셨습니다.

이전 공지사항을 참고해서 writeup을 반드시 제출해주시고,
본선 진출과 관련해서는 여러분의 드림핵 가입 이메일을 통해 개별 안내드리도록 하겠습니다.

다시 한 번 고생많으셨습니다. 감사합니다.


[Qualifiers Conclusion Notice]

The qualifiers has now concluded!
Thank you all for your hard work and enthusiastic participation.

Please make sure to submit your writeup by referring to the previous announcements.
Regarding advancement to the finals, eligible participants will be notified individually via their Dreamhack account email.

Great job everyone, and thank you!

[예선 Writeup 제출]

예선전 상위 40인은 dreamhack+di2026@dreamhack.io로 writeup을 보내야 합니다. writeup을 보낼 때는 다음과 같은 사항이 포함되어 있어야 합니다.

  • 본인의 드림핵 계정 이메일
  • 본선 참가 여부
    writeup은 가능한 Markdown으로 전달해 주시기를 바라며, 웹서비스를 사용해도 무방합니다(e.g., hackmd.io, notion, etc.)
  • 전달 기한: 2026. 01. 26. 23:59 (KST, UTC+9)
    :warning: 상기 이메일 주소가 아닌 다른 이메일로 전송된 writeup은 인정되지 않습니다.

[주의 사항]

  • 대회가 종료된 이후 VM Instance를 생성할 수 없습니다.
  • 본 예선 결과는 드림핵 CTF 레이팅에 반영되지 않습니다.
  • 검수 과정에서 writeup에 기재된 설명 및 코드를 그대로 이행했음에도 문제 해결이 불가능한 경우, 해당 writeup은 문제 풀이로 인정되지 않습니다. 이로 인해 발생하는 참가자의 불이익에 대해 드림핵은 책임지지 않으며, 별도 풀이 검증을 위한 연락은 진행되지 않습니다.

[Preliminary Writeup Submission]

The top 40 participants from the preliminary round must submit their writeup to dreamhack+di2026@dreamhack.io.
The writeup must include the following:

  • Your Dreamhack account email
  • Whether you will participate in the final round
    Please submit the writeup preferably in Markdown format. Using web-based services is also acceptable (e.g., hackmd.io, Notion, etc.).
  • Submission deadline: 2026.01.26 23:59 (KST, UTC+9)
    :warning: Writeups sent to any email address other than the one listed above will not be accepted.

[Important Notes]

  • VM instances cannot be created after the competition ends.
  • The results of this preliminary round will not be reflected in Dreamhack CTF ratings.
  • If the challenge cannot be solved during the review process even when following the explanation and code exactly as written in the writeup, the submission will not be accepted as a valid solution. Dreamhack is not responsible for any disadvantages caused by this, and no additional contact will be made for separate solution verification.

host1은 DigitalOcean을 사용하며, host3과 host8은 Vultr을 사용합니다

Host1 is hosted on DigitalOcean, host3 and host8 are hosted on Vultr.

드림핵의 모든 서버는 KR region을 사용합니다.

All servers in Dreamhack use the KR region.

Dreamhack Invitational Quals 2026
Date
2026.01.24. 09:00:00
~ 2026.01.25. 09:00:00
914 participated
Organized by
Dreamhack
Time
1 day
Team size
Individual
Description

This is a qualification round for Dreamhack Invitational 2026 to be held at .HACK Conference 2026.

  • For any inquiries regarding the CTF, please open a ticket in the #di-2026-quals channel on the official Dreamhack Discord server.
Rules
  1. Sharing flags, codes and files between CTF participants is strictly prohibited and may result in disqualification.
  2. CTF participants must only connect to and attack servers that have been targeted for attack.
  3. Acts and attempts that affect the operation of CTF servers, including Dreamhack, or that may interfere with smooth progress may also be subject to disqualification.
  4. If the challenge cannot be solved during the review process despite strictly following the explanations and code provided in the write-up, the write-up will not be accepted as a valid solution. Dreamhack assumes no responsibility for any disadvantages incurred by participants as a result, and no separate contact will be made for additional solution verification.
Rewards

The top 20 will advance to the finals. If any of the top 10 Dreamhack CTF players as of Season 7 give up their entry, additional selections will be made in order of qualifying results.
Example) If 2 of the top 10 players in the Season 7 Dreamhack CTF give up their entry, 22 players will advance to the finals.

Scoring

Score of each challenge is adjusted based on the number of solvers.

Flag Format

The format of the flag is DH {...}.

Flag Submission Threshold
Flags can be submitted once every 30 seconds per challenge.