The security team noticed someone typing a suspiciously long phone number on their office phone. They suspect the person is using it to send secret messages.

Can you extract the secret message from the `dial.wav` file?

https://ry4n.org/s/dial.wav

Some users complained that their accounts were being accessed without their permission. They all seem to have scanned the same QR code. However, after a recent storm, it looks like the QR code is damaged and can’t be scanned.

Can you fix and decode the QR code?

https://ry4n.org/s/obsqrd.png

A suspicious WAV file was intercepted during an investigation. The file seems to play strange glitchy noises and our analysts think there might be a hidden message in it.

Can you find the hidden message in the `sound.wav` file?

https://ry4n.org/s/sound.wav

You found an empty-looking script that seems suspiciously long. Could there be more to it than meets the eye?

Analyse the file `mysterious_file.txt` and find the flag.

https://ry4n.org/s/mysterious_file.txt

We received a strange email saying we were locked out our account.

Can you analyse the email and find out what it does?

A dump of the email is stored in `email.eml`

https://ry4n.org/s/email.eml

We just got an alert that someone plugged a USB in and ran a malicious program. We isolated the USB and pulled the following Python file, but it seems to be obfuscated.

Can you extract the final payload from the `sadsnake.py` file?

https://ry4n.org/s/challenge.py