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<html lang="en">
<head>
<title>Square CTF: 2023 challenges</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="shortcut icon" type="image/x-icon" href="../favicon.ico">
<meta name="og:title" content="Block CTF: hacking competition!">
<meta name="og:url" content="https://blockctf.com/">
<meta property="og:type" content="website">
<meta name="og:description" content="Compete to solve security-related challenges.">
<meta property="og:image" content="../og.png">
<meta name="twitter:card" content="summary">
<meta name="twitter:site" content="@BlockEng">
<meta name="twitter:title" content="Block CTF: We make security and hacking more approachable — since 2014.">
<meta name="twitter:description" content="Compete to solve security-related challenges.">
<meta name="twitter:image" content="../og.png">
<meta name="description" content="Compete to solve security-related challenges.">
<meta name="author" content="Block, Inc.">
<link rel="stylesheet" media="screen" href="../squarectf.css">
</head>
<body>
<div class="wideline begin">
<span>CHALLENGES(2023)</span>
<span><a href="../index.html"><img src="../sqlogo.svg"></a></span>
<span>CHALLENGES(2023)</span>
</div>
<div><img src="../2022/ctf.png" style="max-width: 100%"></div><br/>
<h1>Note</h1>
<p>Some challenges were hosted on our infrastructure. They are now available as
<a href="https://www.docker.com/">Docker</a> images which you can download and run on your own computer. If you
want to solve the challenges in the same way as the participants of the CTF, you should treat these Docker
instances as blackboxes and avoid peeking in them.
<br><br>
All zipped challenges should include some solution or explanation.
</p>
<h1>Rules</h1>
<p><a href="rules.html">https://blockctf.com/2023/rules.html</a></p>
<h1>Challenges</h1>
<div class="challenges" style="line-height: 0.8em">
<pre><span class="text-muted">*</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="danggit!(part2).html">danggit! (part 2)</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 200</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="emojihunt2.html">emoji hunt 2: the microwave</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 125</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="hackerisulevel0.html">hackerisu level 0</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 200</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="welcome!.html">Welcome!</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 1</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="danggit!(part1).html">danggit! (part 1)</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="chessbros.html">Chessbros</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── misc</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="same.html">same</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── forensics</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 50</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="hackerisulevel1.html">hackerisu level 1</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── exploitation</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 250</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="tank!.html">tank!</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── exploitation</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 350</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="hackerisulevel2.html">hackerisu level 2</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── exploitation</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 350</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="tank!bonus.html">tank! bonus</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── exploitation</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="encrcroach.html">enCRCroach</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── crypto</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 250</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="pseudolottery.html">pseudo lottery</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── crypto</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 300</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="cryptoslidequest.html">Crypto Slide Quest</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── crypto</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 100</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="betheadmin.html">Be The Admin</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── web</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 75</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="justgoaround.html">Just Go Around</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── web</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 250</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="guessthepassword.html">Guess the password</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── reversing</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="halloweened.html">Halloweened</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── reversing</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 500</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="thereisabug.html">There is a bug</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── reversing</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="nauseousprocess.html">nauseous process</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── kidz-corner</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 150</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="sandbox.html">sandbox</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── kidz-corner</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 25</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">├──┬── <a href="oraklpasswordchecker.html">orakl password checker</a></span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ ├── kidz-corner</span>
<span class="text-muted">│ │</span>
<span class="text-muted">│ └── points: 100</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">│</span>
<span class="text-muted">└──┬── <a href="roplon.html">roplon</a></span>
<span class="text-muted"> │</span>
<span class="text-muted"> ├── kidz-corner</span>
<span class="text-muted"> │</span>
<span class="text-muted"> └── points: 75</span>
</pre></div>
<h1>Results</h1>
<p><a href="results.html">https://blockctf.com/2023/results.html</a></p>
<h1>See also</h1>
<p>
<a href="https://squ.re/2POCGUK">Work_at_Square(1)</a>,
<a href="https://squareup.com/legal/privacy">Privacy_policy(1)</a>,
<a href="https://blockctf.com/code_of_conduct.html">Code_of_conduct(1)</a>
</p>
<div class="wideline end">
<span>Block, Inc.</span>
<span>(c) <script>document.write(new Date().toLocaleString("en-us", {month: "long", year: "numeric"}));</script></span>
<span>CHALLENGES(2023)</span>
</div>
</body>
</html>