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binent's Introduction

binent

Cross-platform entropy calculation script with filtering and custom-block size options.

Requirements

  • numpy
  • Python 2 (not tested on 3)
  • Windows/Linux

Demo

demo/demo.gif

##Installation ###Linux

pip install numpy
wget https://raw.githubusercontent.com/yarox24/binent/master/binent.py
chmod +x binent.py

###Windows Check out pre-packaged executables: https://github.com/yarox24/binent/releases

Limitations

  • calculation of files of any size require 64-bit version of Python

Usage

Calculate/interpret entropy of single file:

binent.py unk.zip

Calculate entropy of single file with custom defined block-size = 10M(B):

binent.py -c 10M large.iso")

Calculate entropy of files inside directory (non-recursive):

binent.py mp3_dir

Calculate entropy for files in directory and sub-directories (recursive):

binent.py -r starting_directory

Find files with high entropy:

binent.py -e -r -l 7.99 starting_directory

For more usages check options

Options

positional arguments:
  sources               file1 file2 non_empty_dir/ [...]

optional arguments:
  -h, --help            show this help message and exit
  -c CHUNK, --chunk CHUNK
                        Fixed block-size (e.g. 256, 15K, 20M, 30G) Default: whole file
  -r, --recursive       Recursive traversal
  -l LOW_LIMIT, --low_limit LOW_LIMIT      
                        Show only entries with entropy >= limit (Default: 1.0)
  -u UPPER_LIMIT, --upper_limit UPPER_LIMIT
                        Show only entries with entropy <= limit (Default: 8.0)
  -e, --suppress_errors
                        Don't show any exceptions/errors and also empty files

binent's People

Contributors

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Stargazers

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Watchers

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Forkers

derduffy otilrac

binent's Issues

false positive

I wrote the following script that generate a file the gives false positive results:

`

import struct

 with open('not_encrypted.s','wb') as s:
      for i in range(1000):

          for j in range(256):

               s.write(struct.pack('B', j))

`

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