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Free software to improve your online and offline computer experience.
AntiSteg is a command line tool for cleaning images and widely used Windows AVI files of potentially harmful steganographical content. Many popular image formats (especially those spread via the Web), as well as AVI movie formats are handled by the tool.
Steganography is a means by which information is hidden inside of images/movies (often via high-encryption algorithms), making them completely invisible to all standard image viewers/movie players. Stegged images/movies can carry extremely harmful payloads, which include, but are not limited to:
AntiSteg does not attempt to extract the actual hidden data, but simply antistegs the content, making it impossible to be retrieved at a later point in time. This approach allows it to quickly clean a computer, even if 100,000s of images or dozens of AVI movies are stored on it. In contrast, trying to desteg just one image which uses a high encryption encoding (256 bit or higher), and a properly selected password is computationally nearly infeasible. To attempt the same on an AVI movie, is not even worth mentioning!
Since the amount of images/movies stored on the Web approaches staggering numbers (anywhere from 100s of billions to trillions for images alone), the possibility to successfully store and trade/sell child pornography, snuff movies, distribute viruses, or exchange sensitive information is very high. Even worse, anybody who operates a web site (personal or corporate) that contains images, may unwittingly be helping pedophiles, black-hat hackers, or data spies in their operations. Of course, the same holds true for any e-mail attachment, or MMS being sent!
The next time you view an AVI file download from the Web, or a DVD, which is showing Bambi, or the Little Mermaid
consider this:
Somebody else on the Globe may be viewing the same movie, but instead of Bambi, or Ariel this person is looking at
a privately produced and distributed child porn, or even snuff movie! Hidding short movies within feature length
AVIs is trivial, ignoring and/or trivialising the very same, is at best SHAMEFUL!
Currently available antivirus, antispyware, and antimalware tools do NOT address this problem!
Firewalls provide no security with respect to asynchronous, bi-directional steganographical communication via 2 web sites (spy site and infected site) and simple web monitoring software augmented with steganographical support for modifying images (hosted on spy site). Neither heuristic, nor behavior-based antivirus and antispyware applications will detect anything unusal since all software operations are identical to those performed by 1000s of image editing, image viewing, and web site monitoring sofware currently in circulation.
Companies that allow image/movie specific searches - like Google - do NOTHING to prevent stegged images
from being spread via their services!
Antisteg supports cleaning images and AVI's stored inside of Windows resource files (i.e., dynamic link libraries, executables, etc.). Resource files are wide spread, often shared among programs, and can carry any type of image and/or AVI files. Resource files are especially problematic, since programs that utilize them, can either directly or indirectly act as carriers of code which in turn activate triggers for invoking hidden code functions. All of course neatly hidden inside of steganographically infected image/AVI files and out of sight of every antivirus, antimalware, antispyware, etc. computer sentinels.
AntiSteg operates on most Windows platforms (9x/ME/NT/2000/XP/Vista) and many Linux distributions which have Wine installed on them.
Support for cleaning images and AVI movies stored inside of widely used and shared Windows resource files.
Includes support for antistegging images and AVI files packed within archives. Several popular archive formats are supported.
This version includes anti-stegging of AVI movie files. AVI files are widely spread (P2P networks, EDonkey, BitTorrent, i.e.) and represent an ideal environment for hiding complete movies: like child porn, or snuff! Destroying the content, is not readily accomplished, especially if the hidden movie represents only a fragment of the original AVI file, is frame encrypted, and/or redundancy encoded. AntiSteg is the first and ONLY such tool to deal with this problem, and best of all it's FREE!
AntiSteg [-a] [[-mo] [-noimg]] [-noarc] [-nores] [-b] [-e] [File Extension List] [-m] [-r] [-v] [-l] [Log File] [Start Directory]
-a Antisteg all fixed hard drives
Examples:
AntiSteg -a -v -b -mo -l c:\Out.log
AntiSteg -v -b -e .bmp.gif c:\ImageDirectory
AntiSteg -m -v c:\ImageDirectory
AntiSteg -r
If you have an example of an image which contains steganographic content and you believe AntiSteg is not
successful in removing the data, consider uploading your files. You can do the following : Create an archive which lists
the original image or AVI file, the hidden data file, and the steganographic software used for hiding the data.
For the later, you can substitute a hyperlink from where to download the software. Once you've created your archive file,
you can upload it to a free archive hosting service. Then simply send the assigned upload URL to
Thanks!
Web :
E-Mail:
You can send your questions and comments to the above listed e-mail address. Unfortunately, it will not be possible
to respond to all e-mails. Frequently occurring requests will be added to the FAQ based on available time and resources.
The news group
is available for anybody interested in sharing information with respect to Anti-Steganography and its uses.
If you find this software useful and want to help fight the spread of child pornography (snuff movies), malware, and sensitive information
please consider a donation via PayPal (click below).
Please, donate upfront for further consideration. Commercial licenses are available thereafter for purchase.
© 2008 - ?, Security Online Services.
-mo AntiSteg all located AVI movies
-noimg AntiSteg only AVI movies
-nores Do not antisteg Windows resource files.
-noarc Exclude archives from being opened and their content antistegged
-b Create backup of all antistegged images/movies
-e
-m Check if enough hard disk space is available on current drive to backup all stegged images/movies
-r Restore all backup images/movies to their original state
-v Verbose
-l
AntiSteg all fixed hard drives (images and AVI files), output progress to screen, backup all antistegged images and AVI files, and create a log file
AntiSteg the directory c:\ImageDirectory and all sub directories, consider only BMP and GIF images, output
progress to screen, and backup all antistegged images.
Check if enough memory exists on the current drive to antisteg c:\ImageDirectory and all sub directories,
and output progress to screen.
Restore all anti-stegged images/movies listed in the backup directory to their original state.
Upload of Samples
Download
AntiSteg v2.00 (Newest Release with Resource File support)
AntiSteg v1.20 (Release with Archive support)
AntiSteg v1.10 (Release with AVI support)
AntiSteg v1.00
Contact
Security Online Servies 1
Security Online Servies 2
SOS Online
Comments and Suggestions
NewsGroup AntiSteg
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Technical Support / Commercial Use
Frequently Asked Questions