FREYA

Table of contents

Cryptography

• CyberChef

  Work with Base64, XOR, Hex etc.

• factordb

  Find p and q knowing n.

• crackstation

  Recover password from hash.

• dcode.fr

  Encrypt and decrypt pretty much every cipher there is.

Forensics

• stegoveritas

  Find all kinds of hidden data in files.

  Install with:

    pip3 install stegoveritas
    stegoveritas_install_deps
  

  Usage:

  stegoveritas [file]

• zsteg

  Analyze the image in various ways to find the embedded flag. Solves most of the easy challenges.

  Install with:

    gem install zsteg
  

  Useful commands:

  zsteg -a [file] - try all methods on the given file

  zsteg -E [options] [file] - extract data from the file

• foremost

  Extract embedded images.

  Install with:

    apt install foremost
  

  Useful commands:

  foremost -i [file] - extracts all files hidden within the file

• binwalk

  Analyze and extract data from images.

  Install with:

    apt install binwalk
  

  Useful commands:

  binwalk [file] - only display the data binwalk -e [file] - display and extract the data

• stegsolve

  Analyze the image color planes, invert colors and many more.

• steghide

  Hide or extract data from JPEG, BMP and WAV files. Useful commands: steghide info [file] - checks if the file contains hidden data steghide extract -sf [file] - extract hidden data

• file headers

  Recover file header, CRC and more!