168 lines
6.4 KiB
HTML
168 lines
6.4 KiB
HTML
<head>
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<title>Evan Pratten</title>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
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<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
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integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
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<link rel="stylesheet" href="/assets/css/main.css">
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<link rel="stylesheet" href="/assets/css/github-syntax.css">
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<link href="https://fonts.googleapis.com/css?family=IBM+Plex+Mono:400,400i|IBM+Plex+Sans:100,100i,400,400i,700,700i" rel="stylesheet">
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<link href="https://stackpath.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet" integrity="sha384-wvfXpqpZZVQGK6TAh5PVlGOfQNHSoD2xbE+QkPxCAFlNEevoEH3Sl0sibVcOQVnN" crossorigin="anonymous">
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</head>
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<body>
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<div class="site-ctr">
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<!-- Navbar -->
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<nav class="navbar navbar-dark sticky-top bg-dark navbar-expand-lg">
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<!-- Navbar content -->
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<!-- <div class="container"> -->
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<a class="navbar-brand" href="/">Evan Pratten</a>
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<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup"
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aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
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<div class="navbar-nav ml-auto">
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<a class="nav-item nav-link" href="/blog">Blog</a>
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<a class="nav-item nav-link" href="/projects">Projects</a>
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<!-- <a class="nav-item nav-link" href="/documentation">Documentation</a> -->
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<a class="nav-item nav-link" href="/about">About</a>
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</div>
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<!-- </div> -->
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</div>
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</nav>
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<!-- <div style="height:5vh"></div> -->
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<!-- Header -->
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<!-- <div class="header">
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<div class="container">
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<div class="content">
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</div>
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</div>
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<div class="header-gap"></div>
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</div> -->
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<div class="reactive-bg">
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<div class="post container">
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<h1>I gave Google's CTF a short try and learned a thing or two
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</h1>
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<h4>But exams got in the way and took all the fun
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</h4>
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<hr>
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<p><em>2019-06-23 18:04:00 -0400
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</em></p>
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<br>
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<p>Honestly, I completely forgot that this was the weekend of Google’s online <a href="https://g.co/ctf">CTF Qualifications</a> for 2019 and was late, unprepared, busy, and did not have a team to work with.</p>
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<h2 id="what-is-this-event">What is this event?</h2>
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<p>Google hosts a (yearly?) event where hackers from around the world team up and attempt a variety of tasks like: exploiting machines over a network, reversing firmware, pulling passwords from tcp packets, hacking crypto stuff (something I suck at), breaking compilers. and much more. Generally, this event and others like it are really fun.</p>
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<h2 id="what-i-learned">What I learned</h2>
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<p>Many questions I worked on involved extracting a key from a binary. I employed two vastly different tools for this job. First, a standard linux tool, <code class="highlighter-rouge">strings</code>. When passed a filename, it will extract and print all human-readable strings it can find to the terminal. The flag is usually in this dump. If not, I use the second tool. <a href="https://www.nsa.gov/resources/everyone/ghidra/">Ghidra</a>, an open-source reverse engineering tool designed by the NSA. I used this tool a fair amount during my quick attempt at GCTF.</p>
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<h2 id="will-i-do-this-again">Will I do this again?</h2>
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<p>Yes! The CTF was very fun to try, and I will definitely give it a proper shot next time.</p>
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</div>
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</div>
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</div>
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<!-- <div id="particles-js"></div> -->
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<div class="container foot" style="text-align:center;">
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<br>
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<span class="site-info">
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Site design by: <a href="https://retrylife.ca">Evan Pratten</a> |
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This site was last updated at: 2019-09-23 14:29:52 -0400
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</span>
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</div>
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<!-- Brython -->
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<script src="/assets/js/brython.js"></script>
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<script src="/assets/js/brython_stdlib.js"></script>
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<script>
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function startPY(){
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brython();
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console.log("Started Python")
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}
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window.onload = startPY;
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</script>
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<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
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integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
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crossorigin="anonymous"></script>
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integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
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crossorigin="anonymous"></script>
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<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
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integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
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crossorigin="anonymous"></script>
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<!-- Offsets for links -->
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<script>
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(function ($, window) {
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var adjustAnchor = function () {
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var $anchor = $(':target'),
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fixedElementHeight = 100;
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if ($anchor.length > 0) {
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window.scrollTo(0, $anchor.offset().top - fixedElementHeight);
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}
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};
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$(window).on('hashchange load', function () {
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adjustAnchor();
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});
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})(jQuery, window);
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</script>
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<!-- Global site tag (gtag.js) - Google Analytics -->
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<script async src="https://www.googletagmanager.com/gtag/js?id=UA-74118570-2"></script>
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<script>
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window.dataLayer = window.dataLayer || [];
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function gtag() { dataLayer.push(arguments); }
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gtag('js', new Date());
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gtag('config', 'UA-74118570-2');
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</script>
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<!-- particles -->
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<script>
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var body = document.body
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var particles = document.getElementById("particles-js")
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particles.style.height = body.scrollHeight + "px"
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console.log(body.scrollHeight)
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</script>
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<script src="/assets/js/particles.min.js"></script>
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<script>
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particlesJS.load('particles-js', '/assets/js/particles.json', function () {
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console.log('callback - particles.js config loaded');
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});
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</script>
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</body> |