# Bad Apple
## Description
Someone stumbled upon this file in a secure server. What could it mean?
[Bad_Apple.mp4](Bad_Apple.mp4)
## Solution
Watching the video we hear a strange noise that starts at `1:33`, let's extract the audio using `ffmpeg` and try to open it with audacity 
At first glance, nothing is found, but observing the spectrogram we find a QR code
![](img3.png)
![](img1.png)
Let's try to improve the image
![](img2.png)
If we scan the QR code we get the flag
![](img3.jpg)
#### **FLAG >>** `dctf{sp3ctr0gr4msAreCo0l}`