Home CTFs | FCSC2023 | Intro | Dystalosaurus
Post
Cancel

CTFs | FCSC2023 | Intro | Dystalosaurus

Context

context

We are given the capture made with Salae Logic 2 (dystalosaurus.sal)

We install Salae Logic 2 and open the capture:

salae

By zooming it gives something like this.

zoom

It seems to be only one signal, no clock.

By searching on the internet, Salae Logic 2 has analyzers to read the signal. Since there is no clock, I create an Async Serial analyzer like this:

analyzer

It looks like the analyzer found text:

words

I export to TXT/CSV

export

Here is the result:

raw-export

With a python script, we reconstruct the text:

salae-csv2txt

text

We filter to get the flag 🙂:

flag

This post is licensed under CC BY 4.0 by the author.