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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>
Challenges : IrisCTF 2025 - CTF fun for hackers of all skill levels
</title>
<meta content="A fun, lighthearted, and educational 48-hour online CTF aimed towards hackers of all levels." name="description"/>
<meta content="" name="author"/>
<meta content="/static/img/favicon.png" property="og:image">
<link href="/static/img/favicon.png" rel="icon" type="image/png"/>
<!-- CSS -->
<link href="/static/ctfx.css-v-1.3.0.css" rel="stylesheet"/>
</meta>
</head>
<body>
<div id="navbar">
<a href="/">
<img id="navbar-logo" src="/static/img/logo_navbar.png"/>
</a>
<div id="navbar-buttons">
<a href="/home.html">
Home
</a>
<a class="active" href="/challenges.html">
Challenges
</a>
<a href="/scoreboard.html">
Scoreboard
</a>
<a href="/profile.html">
</a>
<form action="/api" method="post">
</form>
</div>
</div>
<a href="/news.html">
<div id="news-bar">
News (click for archive)
</div>
</a>
<div id="body-content">
<div class="pre-category-name">
Challenge category:
</div>
<div class="category-name typewriter">
Reverse Engineering
</div>
<div style="display:flex; flex-wrap:wrap">
<div class="decorator-square-container" style="transform: rotate(270deg)">
<div class="decorator-square-component" style="background-color:#009927">
</div>
<div class="decorator-square-component title-decorator-gray">
</div>
<div class="decorator-square-component decorator-square-icon" style="background-image: url('/static/img/icons/arrow.png');background-size: 16px;filter:invert(1);">
</div>
</div>
<a class="btn-solid btn-solid-warning" href="challenges-category-Binary+Exploitation.html" style="margin:0px 8px 8px 0px">
Binary Exploitation
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Cryptography.html" style="margin:0px 8px 8px 0px">
Cryptography
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Forensics.html" style="margin:0px 8px 8px 0px">
Forensics
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Miscellaneous.html" style="margin:0px 8px 8px 0px">
Miscellaneous
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Networks.html" style="margin:0px 8px 8px 0px">
Networks
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Open-Source+Intelligence.html" style="margin:0px 8px 8px 0px">
Open-Source Intelligence
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Radio+Frequency.html" style="margin:0px 8px 8px 0px">
Radio Frequency
</a>
<a class="btn-solid btn-solid-warning active" href="challenges-category-Reverse+Engineering.html" style="margin:0px 8px 8px 0px">
Reverse Engineering
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Web+Exploitation.html" style="margin:0px 8px 8px 0px">
Web Exploitation
</a>
<a class="btn-solid btn-solid-warning" href="challenges-category-Welcome.html" style="margin:0px 8px 8px 0px">
Welcome
</a>
</div>
<div style="margin-bottom: 8px">
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-26.html">
Now this will run on my 486?
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
50 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<div style="margin-top: -4px; display:flex; flex-wrap: wrap">
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
easy
</span>
</div>
<p>
It's the future, which means tons of new CPU extensions! Unfortunately, we're using such bleeding edge technology that your computer probably doesn't support it.
</p>
<p>
Thankfully, with our proprietary JIT compiler, you can run it even on your 486!
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.2025.irisc.tf/nowthiswillrunonmy486.tar.gz" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
files
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px">
<b style="margin-right:8px">
By:
</b>
nope
</img>
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-12.html">
Crispy Kelp
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
401 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<div style="margin-top: -4px; display:flex; flex-wrap: wrap">
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
medium
</span>
</div>
<p>
If you like potato chips, fried kelp might be a good healthy alternative!
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.2025.irisc.tf/crispy-kelp.tar.gz" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
crispy-kelp.tar.gz
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
User
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-25.html">
bunny jumper!
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
472 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<div style="margin-top: -4px; display:flex; flex-wrap: wrap">
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
medium
</span>
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
bunny
</span>
</div>
<p>
what is the secret code to get into bunny heaven?
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://bunny-jumper-web.chal.irisc.tf" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-danger btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/link.png" style="width:20px; height:20px; margin-right:8px">
https://bunny-jumper-web.chal.irisc.tf
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
nope
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-14.html">
????????
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
498 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<div style="margin-top: -4px; display:flex; flex-wrap: wrap">
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
medium
</span>
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
??????
</span>
</div>
<p>
where is this challenge? what is this challenge?
</p>
<p>
(must use webgl version to solve, you may need to shift+refresh to clear your cache to see the updated changes)
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://2025.irisc.tf/wgl" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-danger btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/link.png" style="width:20px; height:20px; margin-right:8px">
https://2025.irisc.tf/wgl
</img>
</div>
</a>
</div>
<div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
nope
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<div style="display:flex">
<a href="challenge-id-22.html">
rev lifetime
</a>
<div class="challenge-points">
<img src="/static/img/icons/flag.png"/>
496 Points
</div>
</div>
<small>
</small>
</div>
<div class="card-content">
<div style="margin-top: -4px; display:flex; flex-wrap: wrap">
<span class="btn-solid btn-solid-warning" style="margin:0px 8px 8px 0px; background-color: #3333bb;">
<img src="/static/img/icons/tag.png" style="width: 16px; padding-right: 4px;"/>
hard
</span>
</div>
<p>
rev
</p>
<p>
lift
</p>
<p>
repeat
</p>
<div style="margin-top:8px; display:flex; flex-wrap: wrap">
<a href="https://cdn.2025.irisc.tf/rev-lifetime.tar.gz" style="text-decoration:none; margin-right:8px; margin-bottom:8px" target="_blank">
<div class="tag tag-inline btn-solid btn-solid-link" style="margin-bottom:0px">
<img src="/static/img/icons/package.png" style="width:20px; height:20px; margin-right:8px">
rev-lifetime.tar.gz
</img>
</div>
</a>
</div>
<div>
<div class="tag tag-inline">
<img src="/static/img/icons/info.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
Hint!
</b>
<p>
Flag format for this challenge specifically is
<code>
iris{}
</code>
(what the challenge prints) (yes, this is not what this said before, I changed it)
</p>
</div>
</div>
<div class="tag tag-inline" style="margin-bottom:0px">
<img src="/static/img/icons/user.png" style="width:20px; height:20px; margin-right:8px"/>
<b style="margin-right:8px">
By:
</b>
sera
</div>
</div>
</div>
</div>
<div id="footer">
<b>
Forked from
<a href="https://github.com/Milkdrop/CTFx">
CTFx
</a>
</b>
v1.3.0, developed by
<a href="https://irissec.xyz/">
IrisSec
</a>
.
<br/>
CTFx by
<a href="https://gitlab.com/Milkdrop">
Milkdrop
</a>
, based on
<a href="https://github.com/Nakiami/mellivora">
Mellivora
</a>
.
<br/>
WebGL version developed by
<a href="https://github.com/nesrak1">
nope
</a>
.
<a href="/redir-choice-wgl.html">
Go to WebGL version
</a>
</div>
<!-- JS -->
<audio id="audio-typewriter" src="/static/audio/typewriter.mp3">
</audio>
<audio id="audio-nav-mouseover" src="/static/audio/nav_mouseover.mp3">
</audio>
<audio id="audio-nav-click" src="/static/audio/nav_click.mp3">
</audio>
<audio id="audio-btn-dynamic-mouseover" src="/static/audio/btn_dynamic_mouseover.mp3">
</audio>
<audio id="audio-btn-dynamic-click" src="/static/audio/btn_dynamic_click.mp3">
</audio>
<audio id="audio-btn-solid-mouseover" src="/static/audio/btn_solid_mouseover.mp3">
</audio>
<audio id="audio-btn-solid-click" src="/static/audio/btn_solid_click.mp3">
</audio>
<audio id="audio-checkbox-click" src="/static/audio/checkbox_click.mp3">
</audio>
<script src="/static/ctfx.js-v-1.3.0.js" type="text/javascript">
</script>
</body>
</html>