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# Presentations
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This will be a collection of presentations.
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#!/usr/bin/env bash
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pandoc -s --mathml -i -t revealjs reverse_engineering.md -o presentation.html -V theme=dracula
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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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||||||
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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">
|
||||||
|
<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reset.css">
|
||||||
|
<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/reveal.css">
|
||||||
|
<style>
|
||||||
|
.reveal .sourceCode { /* see #7635 */
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||||||
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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;}
|
||||||
|
div.hanging-indent{margin-left: 1.5em; text-indent: -1.5em;}
|
||||||
|
/* The extra [class] is a hack that increases specificity enough to
|
||||||
|
override a similar rule in reveal.js */
|
||||||
|
ul.task-list[class]{list-style: none;}
|
||||||
|
ul.task-list li input[type="checkbox"] {
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
</style>
|
||||||
|
<link rel="stylesheet" href="https://unpkg.com/reveal.js@^4//dist/theme/dracula.css" id="theme">
|
||||||
|
</head>
|
||||||
|
<body>
|
||||||
|
<div class="reveal">
|
||||||
|
<div class="slides">
|
||||||
|
|
||||||
|
<section id="title-slide">
|
||||||
|
<h1 class="title">Introduction to Reverse Engineering</h1>
|
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|
<p class="author">Stefan Friese</p>
|
||||||
|
<p class="date">02 November, 2023</p>
|
||||||
|
</section>
|
||||||
|
|
||||||
|
<section id="topics" class="slide level1">
|
||||||
|
<h1>Topics</h1>
|
||||||
|
<ul>
|
||||||
|
<li class="fragment">Effective Reverse Engineering</li>
|
||||||
|
<li class="fragment">Reversing with Ghidra</li>
|
||||||
|
</ul>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h2 id="how-do-you-reverse">How Do You Reverse</h2>
|
||||||
|
<p>Reverse Engineering demands a lot of knowledge in multiple
|
||||||
|
fields.</p>
|
||||||
|
<p><strong>Some topics are</strong></p>
|
||||||
|
<ul>
|
||||||
|
<li class="fragment">Assembly Language</li>
|
||||||
|
<li class="fragment">ANSI C</li>
|
||||||
|
<li class="fragment">Other Languages</li>
|
||||||
|
<li class="fragment">Syscalls</li>
|
||||||
|
<li class="fragment">Cryptography</li>
|
||||||
|
</ul>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<p>How do you reverse engineer without knowing little about these
|
||||||
|
topics?</p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h2 id="reversing-is-work">Reversing is Work</h2>
|
||||||
|
<p>Work is a product of power by time.<br />
|
||||||
|
<code>P</code> is your power to solve an issue.</p>
|
||||||
|
<p><code>W = P x t</code></p>
|
||||||
|
<p>The smarter you tackle work, the less time you need to solve an
|
||||||
|
issue.</p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h2 id="knowledge-is-a-map">Knowledge is a Map</h2>
|
||||||
|
<p>You conventiently drive around the city using the underground. That’s
|
||||||
|
how you get to know the main spots of the city.</p>
|
||||||
|
<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">
|
||||||
|
|
||||||
|
<h2 id="knowledge-is-a-map-1">Knowledge is a Map</h2>
|
||||||
|
<p>Invest some time and explore deeper on foot. That’s how you get to
|
||||||
|
know the back alleys.</p>
|
||||||
|
<p><img src="./images/london_by_foot.jpg" alt="London by Foot" width="50%" height="auto"></p>
|
||||||
|
</section>
|
||||||
|
<section id="ghidra-an-overview" class="slide level1">
|
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|
<h1>Ghidra – an Overview</h1>
|
||||||
|
</section>
|
||||||
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<section class="slide level1">
|
||||||
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|
||||||
|
<figure>
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||||||
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<img data-src="./images/Ghidra-Overview.png"
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|
alt="Main View of Ghidra" />
|
||||||
|
<figcaption aria-hidden="true">Main View of Ghidra</figcaption>
|
||||||
|
</figure>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h2 id="watch-out-for-low-hanging-fruits">Watch Out for Low Hanging
|
||||||
|
Fruits</h2>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
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|
||||||
|
<ul>
|
||||||
|
<li class="fragment">Data Segment</li>
|
||||||
|
<li class="fragment">Names of Functions</li>
|
||||||
|
<li class="fragment">Conditions & Comparisons</li>
|
||||||
|
<li class="fragment">Strings: Usernames, Passwords</li>
|
||||||
|
<li class="fragment">URLs, IP & Port Numbers</li>
|
||||||
|
</ul>
|
||||||
|
<p><strong>Do not try to understand the whole code at once, it will only
|
||||||
|
drive you mad.</strong></p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="data-segments">Data Segments</h3>
|
||||||
|
<figure>
|
||||||
|
<img data-src="./images/data-segments.png"
|
||||||
|
alt="A look into the read only data segment" />
|
||||||
|
<figcaption aria-hidden="true">A look into the read only data
|
||||||
|
segment</figcaption>
|
||||||
|
</figure>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="name-of-functions">Name of Functions</h3>
|
||||||
|
<figure>
|
||||||
|
<img data-src="./images/symbol-tree.png"
|
||||||
|
alt="Functions contained in the binary a.k.a. Symbol Tree" />
|
||||||
|
<figcaption aria-hidden="true">Functions contained in the binary a.k.a.
|
||||||
|
Symbol Tree</figcaption>
|
||||||
|
</figure>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="conditions-comparisions">Conditions & Comparisions</h3>
|
||||||
|
<p><img src="./images/decompiled-code.png" alt="Input is Compared to a Hard Coded String" width="50%" height="auto"></p>
|
||||||
|
<p>Input is compared to a hard coded string</p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="function-graph">Function Graph</h3>
|
||||||
|
<p><img src="./images/function-graph.png" alt="Take a Look at the Flow Graph of Functions" width="50%" height="auto"></p>
|
||||||
|
<p>Take a look at the flow graph of functions</p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="strings">Strings</h3>
|
||||||
|
<p><img src="./defined-strings-menu.png" alt="Open the Defined Strings Menu" width="50%" height="auto"></p>
|
||||||
|
<p>Strings can not only be located in data but also in other code
|
||||||
|
segments, sometimes obfuscated</p>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="strings-1">Strings</h3>
|
||||||
|
<figure>
|
||||||
|
<img data-src="./images/defined-strings.png" alt="An old friend" />
|
||||||
|
<figcaption aria-hidden="true">An old friend</figcaption>
|
||||||
|
</figure>
|
||||||
|
</section>
|
||||||
|
<section class="slide level1">
|
||||||
|
|
||||||
|
<h3 id="do-it-yourselves">Do It Yourselves!</h3>
|
||||||
|
<ul>
|
||||||
|
<li class="fragment"><a href="https://ghidra-sre.org/">Download
|
||||||
|
Ghidra</a></li>
|
||||||
|
<li class="fragment"><a href="https://crackmes.one">Download binaries at
|
||||||
|
crackmes.one</a></li>
|
||||||
|
<li class="fragment"><a href="https://hackthebox.eu">Find more binaries
|
||||||
|
on hackthebox</a></li>
|
||||||
|
<li class="fragment"><a href="https://tryhackme.com">Or Find even more
|
||||||
|
on tryhackme</a></li>
|
||||||
|
<li class="fragment">Download firmware of your favorite IoT
|
||||||
|
appliances</li>
|
||||||
|
</ul>
|
||||||
|
</section>
|
||||||
|
</div>
|
||||||
|
</div>
|
||||||
|
|
||||||
|
<script src="https://unpkg.com/reveal.js@^4//dist/reveal.js"></script>
|
||||||
|
|
||||||
|
<!-- reveal.js plugins -->
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||||||
|
<script src="https://unpkg.com/reveal.js@^4//plugin/notes/notes.js"></script>
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||||||
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<script src="https://unpkg.com/reveal.js@^4//plugin/search/search.js"></script>
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||||||
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<script src="https://unpkg.com/reveal.js@^4//plugin/zoom/zoom.js"></script>
|
||||||
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|
||||||
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<script>
|
||||||
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|
||||||
|
// Full list of configuration options available at:
|
||||||
|
// https://revealjs.com/config/
|
||||||
|
Reveal.initialize({
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||||||
|
// Display controls in the bottom right corner
|
||||||
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controls: true,
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||||||
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|
||||||
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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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||||||
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||||||
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// Determines where controls appear, "edges" or "bottom-right"
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controlsLayout: 'bottom-right',
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||||||
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||||||
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// Visibility rule for backwards navigation arrows; "faded", "hidden"
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// or "visible"
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||||||
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controlsBackArrows: 'faded',
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||||||
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|
||||||
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// Display a presentation progress bar
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||||||
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progress: true,
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||||||
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||||||
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// Display the page number of the current slide
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||||||
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slideNumber: false,
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// 'all', 'print', or 'speaker'
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showSlideNumber: 'all',
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||||||
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|
||||||
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// Add the current slide number to the URL hash so that reloading the
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||||||
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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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||||||
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|
||||||
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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
|
||||||
|
history: false,
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||||||
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|
||||||
|
// Enable keyboard shortcuts for navigation
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||||||
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keyboard: true,
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||||||
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|
||||||
|
// Enable the slide overview mode
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||||||
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overview: true,
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||||||
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|
||||||
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// Disables the default reveal.js slide layout (scaling and centering)
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||||||
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// so that you can use custom CSS layout
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disableLayout: false,
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||||||
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|
||||||
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// Vertical centering of slides
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center: true,
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||||||
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// Enables touch navigation on devices with touch input
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||||||
|
touch: true,
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||||||
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||||||
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// Loop the presentation
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||||||
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loop: false,
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||||||
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|
||||||
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// Change the presentation direction to be RTL
|
||||||
|
rtl: false,
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||||||
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|
||||||
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// see https://revealjs.com/vertical-slides/#navigation-mode
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||||||
|
navigationMode: 'default',
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||||||
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|
||||||
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// Randomizes the order of slides each time the presentation loads
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shuffle: false,
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||||||
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||||||
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// Turns fragments on and off globally
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||||||
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fragments: true,
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||||||
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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
|
||||||
|
fragmentInURL: true,
|
||||||
|
|
||||||
|
// Flags if the presentation is running in an embedded mode,
|
||||||
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// i.e. contained within a limited portion of the screen
|
||||||
|
embedded: false,
|
||||||
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|
||||||
|
// Flags if we should show a help overlay when the questionmark
|
||||||
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// key is pressed
|
||||||
|
help: true,
|
||||||
|
|
||||||
|
// Flags if it should be possible to pause the presentation (blackout)
|
||||||
|
pause: true,
|
||||||
|
|
||||||
|
// Flags if speaker notes should be visible to all viewers
|
||||||
|
showNotes: false,
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||||||
|
|
||||||
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// Global override for autoplaying embedded media (null/true/false)
|
||||||
|
autoPlayMedia: null,
|
||||||
|
|
||||||
|
// Global override for preloading lazy-loaded iframes (null/true/false)
|
||||||
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preloadIframes: null,
|
||||||
|
|
||||||
|
// Number of milliseconds between automatically proceeding to the
|
||||||
|
// 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
|
||||||
|
autoSlide: 0,
|
||||||
|
|
||||||
|
// Stop auto-sliding after user input
|
||||||
|
autoSlideStoppable: true,
|
||||||
|
|
||||||
|
// Use this method for navigation when auto-sliding
|
||||||
|
autoSlideMethod: null,
|
||||||
|
|
||||||
|
// Specify the average time in seconds that you think you will spend
|
||||||
|
// presenting each slide. This is used to show a pacing timer in the
|
||||||
|
// speaker view
|
||||||
|
defaultTiming: null,
|
||||||
|
|
||||||
|
// Enable slide navigation via mouse wheel
|
||||||
|
mouseWheel: false,
|
||||||
|
|
||||||
|
// The display mode that will be used to show slides
|
||||||
|
display: 'block',
|
||||||
|
|
||||||
|
// Hide cursor if inactive
|
||||||
|
hideInactiveCursor: true,
|
||||||
|
|
||||||
|
// Time before the cursor is hidden (in ms)
|
||||||
|
hideCursorTime: 5000,
|
||||||
|
|
||||||
|
// Opens links in an iframe preview overlay
|
||||||
|
previewLinks: false,
|
||||||
|
|
||||||
|
// Transition style (none/fade/slide/convex/concave/zoom)
|
||||||
|
transition: 'slide',
|
||||||
|
|
||||||
|
// Transition speed (default/fast/slow)
|
||||||
|
transitionSpeed: 'default',
|
||||||
|
|
||||||
|
// Transition style for full page slide backgrounds
|
||||||
|
// (none/fade/slide/convex/concave/zoom)
|
||||||
|
backgroundTransition: 'fade',
|
||||||
|
|
||||||
|
// Number of slides away from the current that are visible
|
||||||
|
viewDistance: 3,
|
||||||
|
|
||||||
|
// Number of slides away from the current that are visible on mobile
|
||||||
|
// devices. It is advisable to set this to a lower number than
|
||||||
|
// viewDistance in order to save resources.
|
||||||
|
mobileViewDistance: 2,
|
||||||
|
|
||||||
|
// reveal.js plugins
|
||||||
|
plugins: [
|
||||||
|
RevealNotes,
|
||||||
|
RevealSearch,
|
||||||
|
RevealZoom
|
||||||
|
]
|
||||||
|
});
|
||||||
|
</script>
|
||||||
|
</body>
|
||||||
|
</html>
|
||||||
|
|
@ -0,0 +1,131 @@
|
||||||
|
% Introduction to Reverse Engineering
|
||||||
|
% Stefan Friese
|
||||||
|
% 02 November, 2023
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
# Topics
|
||||||
|
|
||||||
|
* Effective Reverse Engineering
|
||||||
|
* Reversing with Ghidra
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## How Do You Reverse
|
||||||
|
|
||||||
|
Reverse Engineering demands a lot of knowledge in multiple fields.
|
||||||
|
|
||||||
|
**Some topics are**
|
||||||
|
|
||||||
|
* Assembly Language
|
||||||
|
* ANSI C
|
||||||
|
* Other Languages
|
||||||
|
* Syscalls
|
||||||
|
* Cryptography
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
How do you reverse engineer without knowing little about these topics?
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Reversing is Work
|
||||||
|
|
||||||
|
Work is a product of power by time.
|
||||||
|
`P` is your power to solve an issue.
|
||||||
|
|
||||||
|
`W = P x t`
|
||||||
|
|
||||||
|
The smarter you tackle work, the less time you need to solve an issue.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Knowledge is a Map
|
||||||
|
|
||||||
|
You conventiently drive around the city using the underground.
|
||||||
|
That's how you get to know the main spots of the city.
|
||||||
|
|
||||||
|
<img src="./images/london_underground.jpg" alt="London Underground" width="50%" height="auto">
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Knowledge is a Map
|
||||||
|
|
||||||
|
Invest some time and explore deeper on foot.
|
||||||
|
That's how you get to know the back alleys.
|
||||||
|
|
||||||
|
<img src="./images/london_by_foot.jpg" alt="London by Foot" width="50%" height="auto">
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
# Ghidra -- an Overview
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Watch Out for Low Hanging Fruits
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
* Data Segment
|
||||||
|
* Names of Functions
|
||||||
|
* Conditions & Comparisons
|
||||||
|
* Strings: Usernames, Passwords
|
||||||
|
* URLs, IP & Port Numbers
|
||||||
|
|
||||||
|
**Do not try to understand the whole code at once, it will only drive you mad.**
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Data Segments
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Name of Functions
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Conditions & Comparisions
|
||||||
|
|
||||||
|
<img src="./images/decompiled-code.png" alt="Input is Compared to a Hard Coded String" width="50%" height="auto">
|
||||||
|
|
||||||
|
Input is compared to a hard coded string
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Function Graph
|
||||||
|
|
||||||
|
<img src="./images/function-graph.png" alt="Take a Look at the Flow Graph of Functions" width="50%" height="auto">
|
||||||
|
|
||||||
|
Take a look at the flow graph of functions
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Strings
|
||||||
|
|
||||||
|
<img src="./images/defined-strings-menu.png" alt="Open the Defined Strings Menu" width="50%" height="auto">
|
||||||
|
|
||||||
|
Strings can not only be located in data but also in other code segments, sometimes obfuscated
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Strings
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
### Do It Yourselves!
|
||||||
|
|
||||||
|
* [Download Ghidra](https://ghidra-sre.org/)
|
||||||
|
* [Download binaries at crackmes.one](https://crackmes.one)
|
||||||
|
* [Find more binaries on hackthebox](https://hackthebox.eu)
|
||||||
|
* [Or Find even more on tryhackme](https://tryhackme.com)
|
||||||
|
* Download firmware of your favorite IoT appliances
|
||||||
Loading…
Reference in New Issue