151 lines
5.0 KiB
HTML
151 lines
5.0 KiB
HTML
<!DOCTYPE html>
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Forty by HTML5 UP
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<li><a href="http://localhost:4000/all_posts.html">All posts</a></li>
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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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<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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<li>© Evan Pratten retrylife</li>
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