sigBits
A Steganography Significant Bits Image Decoder May be useful for CTF challenges and general stego analysis. Feel free to contribute! (This program uses Python 3)
Features
- Extract data from LSB, MSB, or custom bit positions
- Support for RGB channel permutation reading
- Bruteforce mode to automatically test all RGB permutations
- Row-wise or column-wise extraction
- Custom output file naming
- Simple CLI interface
- Built on Python 3 + Pillow
Requirements
This program requires the lib Pillow, which can be installed as follows
pip install Pillow
How to use it
Usage
SigBits [-h] -i INPUT [-t {lsb,msb}] [-o {rgb,rbg,grb,gbr,brg,bgr}] -out OUTPUT [-bf BRUTEFORCE]
[-e {column,row}] [-b BITS]
Options
| Parameters Option | Functionality |
|---|---|
| -h, --help | List all commands and functionality of them |
| -i, --input | Specifies the input file that the program will analyze |
| -t, --type | Choose between read LSB or MSB (Default is LSB) |
| -o, --order | Read the LSB/MSB in the specify order (Default is RGB) |
| -out, --output | Choose the name of the output file |
| -bf, --bruteforce | Bruteforce all possible permutations of the R, G, and B channel |
| -e, --extract | Choose between extracting by row or column (Default is Column) |
| -b, --bits | Choose the bits you want to extract information from. If this option is provided, the --type (-t) parameter will be ignored |
Examples
Extract using default LSB mode
python sigBits.py -i image.png -out output.txt
Extract using MSB
python sigBits.py -i image.png -t MSB -out output.txt
Extract using custom bit positions
python sigBits.py -i image.png -b 00000001 -out output.txt
Bruteforce all RGB permutations
python sigBits.py -i image.png -bf -out output.txt
Specify custom output file
python sigBits.py -i image.png -out output.txt
Read bits in BGR order
python sigBits.py -i image.png -o BGR -out output.txt
Contributing
Contributions, issues, and pull requests are welcome! If you'd like to add features or improve decoding methods, feel free to open a PR.