Suspecious Message
Difficulty = Easy
MQDzqdor{Ix4Oa41W_1F_B00h_m1YlqPpPP}
A clue was given as photo.png.
Many cipher techniques exist using grid or box style but all failed to work. Curiosity wouldn’t let me stop there until I found playfair technique.
Using boxentrix, I was able to decrypt it without error
flag CTFLEARN{PL4YF41R_1S_C00L_C1PHERRRR}
Done