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https://github.com/evyatarmeged/stegextract
Detect hidden files and text in images
https://github.com/evyatarmeged/stegextract
bash capture-the-flag ctf extract-images extraction hidden-files images penetration-testing steg steganography stego
Last synced: 3 months ago
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Detect hidden files and text in images
- Host: GitHub
- URL: https://github.com/evyatarmeged/stegextract
- Owner: evyatarmeged
- License: mit
- Created: 2018-04-04T17:26:45.000Z (almost 7 years ago)
- Default Branch: master
- Last Pushed: 2023-05-21T08:33:26.000Z (over 1 year ago)
- Last Synced: 2024-11-01T00:51:29.688Z (3 months ago)
- Topics: bash, capture-the-flag, ctf, extract-images, extraction, hidden-files, images, penetration-testing, steg, steganography, stego
- Language: Shell
- Homepage:
- Size: 981 KB
- Stars: 114
- Watchers: 2
- Forks: 37
- Open Issues: 2
-
Metadata Files:
- Readme: README.MD
- License: LICENSE
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README
# Stegextract
Bash script to extract hidden files and strings from images.
## Description
Stegextract extracts any trailing data after the image's closing bytes, and any hidden files (or other images) embedded within the image.
Short byte combinations such as JPEG's `FFD8 FFE0` might sometimes create false positives.
Manually reviewing the hexdump is sometimes inevitable in cases of highly complex embedded files.
Stegextract is not the solution for any color/pixel/filter/LSB related Steganography, nor does it try to be. It
relies on magic numbers, hexdumps and binary data alone.
Currently supports PNG, JPG, and GIF.
**Update**: `--analyze` flag was deprecated and is now being performed automatically with every scan.
## Installation
```
sudo sh -c 'curl https://raw.githubusercontent.com/evyatarmeged/stegextract/master/stegextract > /usr/local/bin/stegextract'
sudo chmod +x /usr/local/bin/stegextract
```
## Usage
```
Usage: stegextract [options]
-h, --help Print this and exit
-o, --outfile Specify an outfile
-s, --strings Extract strings from file
-q, --quiet Do not output to stdout
--force-format Force this image format instead of detecting
```
## POC:
Image examples from the above GIF can be found in the [examples](https://github.com/evyatarmeged/stegextract/tree/master/examples) folder.