buuctf Who won the game Mysterious 1

Who won the game

Open the attachment as shown in the picture, which looks like a QR code

Pull into kail binwalk and find that there is a compressed package foremost separated under the picture

Unzip found that the picture needs a password to unzip

Blast it to get the password and
save this frame with StegSolve Frame Browser

Then use StegSolve to open the Red0 channel to find the QR code

Analysis can get flag

Mysterious 1

Programs for inputting strings, strings view strings but no results

Open with ida and find this to enter the view

The analysis program gets the converted integer and adds 1 to the value to be 123, then the condition of v10 == 123 && v12 =='x' && v14 =='z' && v13 =='y' can be easily satisfied, and enter 122xyz to get flag