# 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:
![https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/openfile.JPG](https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/openfile.JPG)
By clicking on Analyze -> Async Serial (I choose this one because the challenge name Serial Logs) we get the following:
![https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/asyncserial.JPG](https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/asyncserial.JPG)
![https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/asyncserial.JPG](https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/asyncserial.JPG)
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:
![https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/save.JPG](https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/save.JPG)
When we click on Terminal we can see the flag:
![https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/terminal.JPG](https://github.com/evyatar9/Writeups/raw/master/CTFs/2021-CTF_HackTheBox/Cyber_Apocalypse_2021/Hardware-Serial_Logs/images/terminal.JPG)
And we get the flag: ```CHTB{wh47?!_f23qu3ncy_h0pp1n9_1n_4_532141_p2070c01?!!!52}```.