Tags: misc 

Rating: 5.0

## Insanity check
## Description:
```
insanity introduce inspire something incredible impulse ivory intelligence incident implication hidden illustrate isolation illusion indirect instinct inappropriate interrupt infection in item inspector institution infinite insert the insist import ignite incentive influence instruction invasion install infrastructure innovation ignore investment impact improve increase rules identification initial immune inhabitant indulge illness information iron injection interest intention inquiry inflate impound
```
## Solution:
As you see, we got multiple words starting with "`in`" and they are 4+ characters long. That's except of `something hidden in the rules`.
Huh, okay. Looking at the rules in the Discord we do become more and more insane, but there's a trick.
We see the rules as:
```
1. rule 1
2. rule 2
...
```
But we can click on triple dots `...` at the top-right corner of the rules message and copy the message with formatting.
After pasting, turns out the rules have a hidden message:
```
107122414347637. rule 1
125839376402043. rule 2
122524418662265. rule 3
122549902405493. rule 4
121377376789885. rule 5
```
Okay! This is something!
Except... What is it?
This looks like a Unix time stamp, but that doesn't seem right.
Let's use a tool like the following: <https://scwf.dima.ninja/>.
Okay! The first number got decoded into `amateu`!
Try the second one... It gets decoded into `rsCTF{` and we get a hit in `RSA Decimal` algorithm!
Go to this algorithm's output and decode all the rest.
Good job, we are done!
---
Original writeup was posted in [Neon Flags community](https://discord.gg/SH6Y3dJuU4).

Original writeup (https://discord.gg/SH6Y3dJuU4).