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TryHackme’s Advent of Cyber 2023 — Day 5 Writeup

TryHackMe — Reverse engineering A Christmas DOScovery: Tapes of Yule-tide Past

Nanda Siddhardha
2 min readDec 5, 2023

Learning Objectives

- Experience how to navigate an unfamiliar legacy system.

- Learn about DOS and its connection to its contemporary, the Windows Command Prompt.

- Discover the significance of file signatures and magic bytes in data recovery and file system analysis.

DOS Cheat Sheet

If you are familiar with the command prompt in Windows, DOS shouldn’t be too much of a problem for you because their syntax and commands are the same. However, some utilities are only present on Windows and aren’t available on DOS, so we have created a DOS cheat sheet below to help you in this task.

Day 5— Tasks Answers

1. How large (in bytes) is the AC2023.BAK file?

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