S Abhishek
Jun 24, 2021



  • The dimension of a playground is given as 1359x789.
  • Can you find out the most important information hidden in this file using the given data?


  • Download the file.
  • We shall understand that there are some errors in the Hex values.
  • So let’s correct it.
  • Still we wont be able to see the Image.
  • It gives the CRC error since the Height and the Width is set to 0.
  • In the challenge description, we shall get the dimensions.
  • Convert it to Hex and correct the Hex Chunks.
  • Finally we get the Image with the Flag.



S Abhishek

Data Engineer Intern @Rolls-Royce | Computer Science Undergraduate | Amrita Vishwa Vidyapeetham | Former Member of security research & CTF team — @teambi0s.