# Full writeups for this challenge avaliable on [https://github.com/evyatar9/Writeups/blob/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/](https://github.com/evyatar9/Writeups/blob/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/)

# CTF HackTheBox 2021 Cyber Apocalypse 2021 - Serial Logs

Category: Hardware, Points: 300

# Serial Logs Solution

The attached zip file contains the following file: ```serial_logs.sal```.

By google searching how to dealing with .sal file I found the following: [Logic Analyzer Saleas](https://www.saleae.com/downloads/).

Let's install it and open the .sal file:


By clicking on Analyze -> Async Serial (I choose this one because the challenge name Serial Logs) we get the following:



After brute forcing on Bit Rate (Just take from [Bit Rates](https://en.wikipedia.org/wiki/Serial_port)) I found 72000 Bit rate is match.

After we save it we get the following:


When we click on Terminal we can see the flag:


And we get the flag: ```CHTB{wh47?!_f23qu3ncy_h0pp1n9_1n_4_532141_p2070c01?!!!52}```.

Original writeup (https://github.com/evyatar9/Writeups/tree/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs).