MCSC 2019 Wait What?(forensics) Write up

MCSC 2019 Wait What?(forensics) Write up

1. Wait What? (Forensics)

Download Challenge File

https://www.dropbox.com/s/ldwb53pzy3adqrl/whatisthat.png?dl=0

This is a image file with png extension.I opened it with stegsolve.

We can see the Qr code after chainging the color plane to red 0 plane. See the following screenshot.

Now Cut this Qr code and try to read this Qr code.I used the online Qr code reader.

Now I get the Qr code result.

+AE0AQwBTAEMAMgAwADEAOQB7AGEAdw-e+AHMAbwBt-eu+AGcAMAB0AHMAdA-e+AGc-f+AGwAYQBnAH0-

Trying to decode this text via online tools. I found a website https://xssor.io/.

Click DE (decode) ,I can see the flag MCSC2019{awesomeug0tstegflag}.

Bingooo!!!!