The First Computer Virus in Action!

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Bits und Bolts

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Published on October 2, 2025 1:00:41 PM ● Video Link: https://www.youtube.com/watch?v=LT4KsjQ_91E

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Have you ever lost your data or even the entire operating system to a virus infection? Those pesky little programs with their intention to cause harm are a pain to get rid of. In this video, I will show you how it all started for the DOS ecosystem: The Brain computer virus. Let's explore how this virus works, how it spreads, and if it causes any damage.

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▬▬▬▬ Timestamps ▬▬▬▬▬▬▬▬▬▬▬▬▬▬
00:00 Introduction
03:25 Setup 486
05:07 What is the Brain virus
06:48 Booting Brain
08:33 Preparing the floppy disk
10:50 DEBUG the boot sector
13:55 Stealth capability of Brain
16:16 Self-Replication of Brain
21:12 Debrain