Moderators DennisD Posted January 10, 2011 Moderators Share Posted January 10, 2011 Hide files inside a jpg. Neat. How to Hide Files in JPEG Pictures: Link to comment Share on other sites More sharing options...
Moderators Andavari Posted January 10, 2011 Moderators Share Posted January 10, 2011 Also possibly a good way to get malware too. Link to comment Share on other sites More sharing options...
Moderators Nergal Posted January 10, 2011 Moderators Share Posted January 10, 2011 Ha I said exactly the same thing on portablefreeware.com re the program that allows hidden files in pictures ADVICE FOR USING CCleaner'S REGISTRY INTEGRITY SECTION DON'T JUST CLEAN EVERYTHING THAT'S CHECKED OFF. Do your Registry Cleaning in small bits (at the very least Check-mark by Check-mark) ALWAYS BACKUP THE ENTRY, YOU NEVER KNOW WHAT YOU'LL BREAK IF YOU DON'T. Support at https://support.ccleaner.com/s/?language=en_US Pro users file a PRIORITY SUPPORT via email support@ccleaner.com Link to comment Share on other sites More sharing options...
redhawk Posted January 11, 2011 Share Posted January 11, 2011 It seems rather a lot of effort just to hide a few files so I'll share a personal trick of my own. Back the good old days of MS-DOS the dot symbol was used a lot for navigation around directories (folders as Windows calls them but the same thing). CD .. would take you down a directory level and . could be used to represent the current directory of a drive i.e. copy a:. d:\ So it would probably surprising you to know that under XP (and maybe Vista / Windows 7) it's possible to create a folder containing dots using the following command: mkdir "\\?\c:\.." (make .. folder in the root of C drive) Having a file or folder with dots (not mixed with other characters) can be quite amusing because it breaks regular DOS commands i.e. "CD .." and "DIR .." as well as applications i.e Windows Explorer because having ".." in a path makes the path invalid. So basically you now have a folder that can contain any files and no way of knowning what's actually inside it. To transfer files to a ".." folder for example kitten.jpg on drive e: copy e:\kitten.jpg "\\?\c:\..\kitten.jpg" To copy it back from the hidden folder: copy "\\?\c:\..\kitten.jpg" e:\kitten-new.jpg To remove the hidden folder and it's contents: rmdir /s "\\?\c:\.." btw: if anyone has access to Microsoft Vista or Windows 7 could you confirm if this trick still works. Richard S. Link to comment Share on other sites More sharing options...
login123 Posted January 11, 2011 Share Posted January 11, 2011 The method described in Dennis's post works with 7zip which is free. Just tried it. 7zip HERE The CCleaner SLIM version is always released a bit after any new version; when it is it will be HERE :-) Pssssst: ... It isn't really a cloud. Its a bunch of big, giant servers. Link to comment Share on other sites More sharing options...
Moderators DennisD Posted January 12, 2011 Author Moderators Share Posted January 12, 2011 It's one of those little tricks, like Richard's, which aren't really that useful, but fun to know. There's probably heaps of stuff you can do which you would never learn from your Operating System manual. Link to comment Share on other sites More sharing options...
ishan_rulz Posted January 13, 2011 Share Posted January 13, 2011 I have been searching for this trick for quite a while now. A person did this on some other forum and I was amazed, I kept trying different things to make it work... now I know. Thanks a lot, Dennis! Simplicity is hard. Link to comment Share on other sites More sharing options...
redhawk Posted January 13, 2011 Share Posted January 13, 2011 The thing about archiving formats such as RAR and ZIP their data start position can be flexible. This was intentional to support manual extraction of files from self-extracting executables which themselves are nothing more than executable code + compressed data. I've tested this method with mp3 files too (copy /b jpg + mp3) (playable only in Winamp), however if someone i.e. network admin notices large jpgs but small images I don't think they would be easily fooled. As for my little trick it's probably not much use to most people and less understood by non DOS users. It's interesting to see just how badly Windows reacts to a folder i.e. ".." because it's neither visible in Windows Explorer nor can you search for the filename(s) inside it. This means that even a Guest account user has the power to dodge anti-virus scanners and security auditing software. Richard S. Link to comment Share on other sites More sharing options...
Aethec Posted January 13, 2011 Share Posted January 13, 2011 Another way to hide data is to use NTFS's Alternate Data Streams (ADSs). However, doing so without programming is pretty hard since common command-line tools such as "copy" don't work. You can still hide text easily though: notepad myfile.txt:hidden.txt will open a Notepad window which will edit the "hidden.txt" alternate data stream in "myfile.txt". Save it when you're finished. (You can create an ADS for a directory, too) If you hide a 10 MB ADS into a 10 KB file, Windows Explorer will show the file as being 10 KB. You have to remember the ADS's name, however Piriform French translator Link to comment Share on other sites More sharing options...
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