349 lines
11 KiB
HTML
349 lines
11 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="generator" content="pandoc">
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<meta name="author" content="Stefan Friese">
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<title>Introduction to Reverse Engineering</title>
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<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
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<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reset.css">
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<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reveal.css">
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<style>
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.reveal .sourceCode { /* see #7635 */
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overflow: visible;
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}
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code{white-space: pre-wrap;}
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span.smallcaps{font-variant: small-caps;}
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div.columns{display: flex; gap: min(4vw, 1.5em);}
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div.column{flex: auto; overflow-x: auto;}
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div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
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/* The extra [class] is a hack that increases specificity enough to
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override a similar rule in reveal.js */
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ul.task-list[class]{list-style: none;}
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ul.task-list li input[type="checkbox"] {
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font-size: inherit;
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width: 0.8em;
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margin: 0 0.8em 0.2em -1.6em;
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vertical-align: middle;
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}
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</style>
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<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/theme/dracula.css" id="theme">
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</head>
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<body>
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<div class="reveal">
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<div class="slides">
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<section id="title-slide">
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<h1 class="title">Introduction to Reverse Engineering</h1>
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<p class="author">Stefan Friese</p>
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<p class="date">02 November, 2023</p>
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</section>
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<section id="topics" class="slide level1">
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<h1>Topics</h1>
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<ul>
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<li class="fragment">Effective Reverse Engineering</li>
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<li class="fragment">Reversing with Ghidra</li>
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</ul>
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</section>
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<section class="slide level1">
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<h2 id="how-do-you-reverse">How Do You Reverse</h2>
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<p>Reverse Engineering demands a lot of knowledge in multiple
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fields.</p>
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<p><strong>Some topics are</strong></p>
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<ul>
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<li class="fragment">Assembly Language</li>
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<li class="fragment">ANSI C</li>
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<li class="fragment">Other Languages</li>
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<li class="fragment">Syscalls</li>
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<li class="fragment">Cryptography</li>
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</ul>
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</section>
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<section class="slide level1">
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<p>How do you reverse engineer without knowing little about these
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topics?</p>
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</section>
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<section class="slide level1">
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<h2 id="reversing-is-work">Reversing is Work</h2>
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<p>Work is a product of power by time.<br />
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<code>P</code> is your power to solve an issue.</p>
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<p><code>W = P x t</code></p>
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<p>The smarter you tackle work, the less time you need to solve an
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issue.</p>
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</section>
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<section class="slide level1">
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<h2 id="knowledge-is-a-map">Knowledge is a Map</h2>
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<p>You conventiently drive around the city using the underground. That’s
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how you get to know the main spots of the city.</p>
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<p><img src="./images/london_underground.jpg" alt="London Underground" width="50%" height="auto"></p>
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</section>
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<section class="slide level1">
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<h2 id="knowledge-is-a-map-1">Knowledge is a Map</h2>
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<p>Invest some time and explore deeper on foot. That’s how you get to
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know the back alleys.</p>
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<p><img src="./images/london_by_foot.jpg" alt="London by Foot" width="50%" height="auto"></p>
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</section>
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<section id="ghidra-an-overview" class="slide level1">
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<h1>Ghidra – an Overview</h1>
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</section>
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<section class="slide level1">
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<figure>
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<img data-src="./images/Ghidra-Overview.png"
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alt="Main View of Ghidra" />
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<figcaption aria-hidden="true">Main View of Ghidra</figcaption>
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</figure>
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</section>
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<section class="slide level1">
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<h2 id="watch-out-for-low-hanging-fruits">Watch Out for Low Hanging
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Fruits</h2>
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</section>
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<section class="slide level1">
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<ul>
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<li class="fragment">Data Segment</li>
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<li class="fragment">Names of Functions</li>
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<li class="fragment">Conditions & Comparisons</li>
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<li class="fragment">Strings: Usernames, Passwords</li>
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<li class="fragment">URLs, IP & Port Numbers</li>
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</ul>
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<p><strong>Do not try to understand the whole code at once, it will only
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drive you mad.</strong></p>
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</section>
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<section class="slide level1">
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<h3 id="data-segments">Data Segments</h3>
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<figure>
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<img data-src="./images/data-segments.png"
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alt="A look into the read only data segment" />
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<figcaption aria-hidden="true">A look into the read only data
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segment</figcaption>
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</figure>
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</section>
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<section class="slide level1">
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<h3 id="name-of-functions">Name of Functions</h3>
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<figure>
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<img data-src="./images/symbol-tree.png"
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alt="Functions contained in the binary a.k.a. Symbol Tree" />
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<figcaption aria-hidden="true">Functions contained in the binary a.k.a.
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Symbol Tree</figcaption>
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</figure>
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</section>
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<section class="slide level1">
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<h3 id="conditions-comparisions">Conditions & Comparisions</h3>
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<p><img src="./images/decompiled-code.png" alt="Input is Compared to a Hard Coded String" width="50%" height="auto"></p>
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<p>Input is compared to a hard coded string</p>
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</section>
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<section class="slide level1">
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<h3 id="function-graph">Function Graph</h3>
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<p><img src="./images/function-graph.png" alt="Take a Look at the Flow Graph of Functions" width="50%" height="auto"></p>
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<p>Take a look at the flow graph of functions</p>
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</section>
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<section class="slide level1">
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<h3 id="strings">Strings</h3>
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<p><img src="./defined-strings-menu.png" alt="Open the Defined Strings Menu" width="50%" height="auto"></p>
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<p>Strings can not only be located in data but also in other code
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segments, sometimes obfuscated</p>
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</section>
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<section class="slide level1">
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<h3 id="strings-1">Strings</h3>
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<figure>
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<img data-src="./images/defined-strings.png" alt="An old friend" />
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<figcaption aria-hidden="true">An old friend</figcaption>
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</figure>
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</section>
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<section class="slide level1">
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<h3 id="do-it-yourselves">Do It Yourselves!</h3>
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<ul>
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<li class="fragment"><a href="https://ghidra-sre.org/">Download
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Ghidra</a></li>
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<li class="fragment"><a href="https://crackmes.one">Download binaries at
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crackmes.one</a></li>
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<li class="fragment"><a href="https://hackthebox.eu">Find more binaries
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on hackthebox</a></li>
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<li class="fragment"><a href="https://tryhackme.com">Or Find even more
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on tryhackme</a></li>
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<li class="fragment">Download firmware of your favorite IoT
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appliances</li>
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</ul>
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</section>
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</div>
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</div>
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<script src="https://unpkg.com/reveal.js@^4//dist/reveal.js"></script>
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<!-- reveal.js plugins -->
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<script src="https://unpkg.com/reveal.js@^4//plugin/notes/notes.js"></script>
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<script src="https://unpkg.com/reveal.js@^4//plugin/search/search.js"></script>
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<script src="https://unpkg.com/reveal.js@^4//plugin/zoom/zoom.js"></script>
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<script>
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// Full list of configuration options available at:
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// https://revealjs.com/config/
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Reveal.initialize({
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// Display controls in the bottom right corner
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controls: true,
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// Help the user learn the controls by providing hints, for example by
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// bouncing the down arrow when they first encounter a vertical slide
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controlsTutorial: true,
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// Determines where controls appear, "edges" or "bottom-right"
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controlsLayout: 'bottom-right',
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// Visibility rule for backwards navigation arrows; "faded", "hidden"
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// or "visible"
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controlsBackArrows: 'faded',
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// Display a presentation progress bar
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progress: true,
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// Display the page number of the current slide
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slideNumber: false,
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// 'all', 'print', or 'speaker'
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showSlideNumber: 'all',
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// Add the current slide number to the URL hash so that reloading the
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// page/copying the URL will return you to the same slide
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hash: true,
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// Start with 1 for the hash rather than 0
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hashOneBasedIndex: false,
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// Flags if we should monitor the hash and change slides accordingly
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respondToHashChanges: true,
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// Push each slide change to the browser history
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history: false,
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// Enable keyboard shortcuts for navigation
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keyboard: true,
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// Enable the slide overview mode
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overview: true,
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// Disables the default reveal.js slide layout (scaling and centering)
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// so that you can use custom CSS layout
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disableLayout: false,
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// Vertical centering of slides
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center: true,
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// Enables touch navigation on devices with touch input
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touch: true,
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// Loop the presentation
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loop: false,
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// Change the presentation direction to be RTL
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rtl: false,
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// see https://revealjs.com/vertical-slides/#navigation-mode
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navigationMode: 'default',
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// Randomizes the order of slides each time the presentation loads
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shuffle: false,
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// Turns fragments on and off globally
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fragments: true,
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// Flags whether to include the current fragment in the URL,
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// so that reloading brings you to the same fragment position
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fragmentInURL: true,
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// Flags if the presentation is running in an embedded mode,
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// i.e. contained within a limited portion of the screen
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embedded: false,
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// Flags if we should show a help overlay when the questionmark
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// key is pressed
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help: true,
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// Flags if it should be possible to pause the presentation (blackout)
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pause: true,
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// Flags if speaker notes should be visible to all viewers
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showNotes: false,
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// Global override for autoplaying embedded media (null/true/false)
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autoPlayMedia: null,
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// Global override for preloading lazy-loaded iframes (null/true/false)
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preloadIframes: null,
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// Number of milliseconds between automatically proceeding to the
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// next slide, disabled when set to 0, this value can be overwritten
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// by using a data-autoslide attribute on your slides
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autoSlide: 0,
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// Stop auto-sliding after user input
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autoSlideStoppable: true,
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// Use this method for navigation when auto-sliding
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autoSlideMethod: null,
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// Specify the average time in seconds that you think you will spend
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// presenting each slide. This is used to show a pacing timer in the
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// speaker view
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defaultTiming: null,
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// Enable slide navigation via mouse wheel
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mouseWheel: false,
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// The display mode that will be used to show slides
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display: 'block',
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// Hide cursor if inactive
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hideInactiveCursor: true,
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// Time before the cursor is hidden (in ms)
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hideCursorTime: 5000,
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// Opens links in an iframe preview overlay
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previewLinks: false,
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// Transition style (none/fade/slide/convex/concave/zoom)
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transition: 'slide',
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// Transition speed (default/fast/slow)
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transitionSpeed: 'default',
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// Transition style for full page slide backgrounds
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// (none/fade/slide/convex/concave/zoom)
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backgroundTransition: 'fade',
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// Number of slides away from the current that are visible
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viewDistance: 3,
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// Number of slides away from the current that are visible on mobile
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// devices. It is advisable to set this to a lower number than
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// viewDistance in order to save resources.
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mobileViewDistance: 2,
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// reveal.js plugins
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|||
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plugins: [
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|||
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RevealNotes,
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|||
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RevealSearch,
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|||
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RevealZoom
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]
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|||
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});
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|||
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</script>
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</body>
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</html>
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