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  1. 05 Passwords & Ciphers

Images Exif Steg

PreviousHydra BrutesNextMalware Analysis

Last updated 2 years ago

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Easy

  • - Dont forget the Easy stuff!!

  • strings -n 8 secret.png

imagemagick

sudo apt install imagemagick
sudo apt install graphicsmagick-imagemagick-compat
identify -verbose allyourbase.jpg | grep "exif"

stegextract

sudo curl https://raw.githubusercontent.com/evyatarmeged/stegextract/master/stegextract > /usr/local/bin/stegextract
sudo chmod +x /usr/local/bin/stegextract
stegextract allyourbase.gif --outfile allyourbase
unzip allyourbase

binwalk

  • search image for embedded files and exe code

  • Find an .elf file .. make sure you chmod +x .. execute it to test!

> binwalk nineveh.png        ..find
> binwalk -Me nineveh.png    ..extract
> binwalk -e allyourbase.gif 

-M: Recursively scan extracted files.
-e: Automatically extract known file types.

Found!!
> ls _nineveh.png.extracted/secret/

You might find keys :)

https://gchq.github.io/CyberChef/
https://medium.com/@FourOctets/ctf-tidbits-part-1-steganography-ea76cc526b40
LookAround
ssh