Logo Sucks Bad

  • Download the PNG Image
  • Try analysing using zsteg.
  • We shall see the Lorum Ipsum text there in the b1,rgb,lsb,xy payload.
  • Let’s extract the entire LSB payload from the Image.
zsteg -E <PayLoad> <File Name>zsteg -E b1,rgb,lsb,xy logo.png
  • We shall see the flag in between the text.
nullhsctf{th4_l3est_s3gnific3nt_bbbbbbbbbbbbb}

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
S Abhishek

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