163 lines
4.9 KiB
HTML
163 lines
4.9 KiB
HTML
<!DOCTYPE html>
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<html>
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<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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<!--[if lte IE 8]><script src="/assets/js/ie/html5shiv.js"></script><![endif]-->
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<link rel="stylesheet" href="/assets/css/main.css" />
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<!-- <link rel="stylesheet" href="/assets/css/custom.css" /> -->
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<!--[if lte IE 9]><link rel="stylesheet" href="/assets/css/ie9.css" /><![endif]-->
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<!-- Syntax highlight -->
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<link rel="stylesheet" href="/assets/css/vs.css" />
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</head>
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<body>
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<!-- Wrapper -->
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<div id="wrapper">
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<!-- Header -->
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<header id="header" style="filter:blur" >
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<a href="/" class="logo"><strong>Evan Pratten</strong> <span>retrylife</span></a>
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<nav>
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<!-- <a href="#menu">Menu</a> -->
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</nav>
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</header>
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<!-- Menu -->
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<!-- <nav id="menu">
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<ul class="links">
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<li><a href="http://0.0.0.0:4000//">Home</a></li>
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<li><a href="http://0.0.0.0:4000/all_posts">All posts</a></li>
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</ul>
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<ul class="actions vertical">
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<li><a href="#" class="button special fit">Get Started</a></li>
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<li><a href="#" class="button fit">Log In</a></li>
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</ul>
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</nav> -->
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<section id="banner" class="major" style="height:40vh">
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<div class="inner">
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<header class="major">
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<h1>I gave Google's CTF a short try and learned a thing or two</h1>
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</header>
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<div class="content">
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<p >But exams got in the way and took all the fun</p>
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</div>
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</div>
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</section>
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<!-- Main -->
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<div id="main" class="alt">
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<!-- One -->
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<section id="one">
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<div class="inner">
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<p><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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</p>
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</div>
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</section>
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</div>
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<!-- Footer -->
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<footer id="footer">
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<div class="inner">
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<ul class="icons">
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<li><a href="https://twitter.com/ewpratten" class="icon alt fa-twitter" target="_blank"><span class="label">Twitter</span></a></li>
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<li><a href="https://gitlab.com/u/ewpratten" class="icon alt fa-gitlab" target="_blank"><span class="label">GitLab</span></a></li>
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<li><a href="https://github.com/ewpratten" class="icon alt fa-github" target="_blank"><span class="label">GitHub</span></a></li>
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<li><a href="/feed.xml" class="icon alt fa-rss" target="_blank"><span class="label">RSS</span></a></li>
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</ul>
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<ul class="copyright">
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<li>© Evan Pratten</li>
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<li>Design based from: <a href="https://html5up.net" target="_blank">HTML5 UP</a></li>
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</ul>
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</div>
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</footer>
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</div>
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<!-- Scripts -->
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<script src="/assets/js/jquery.min.js"></script>
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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() {
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dataLayer.push(arguments);
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}
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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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</body>
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</html> |