Comments on: Excellent Trick on JPG Images. An Image That Contains Images

By: admin

admin — Fri, 02 Oct 2009 08:47:24 +0000

I think so. But it is a very old known trick that antivirus companies can easily trace and eliminate.

By: Bookster

Bookster — Fri, 02 Oct 2009 08:44:00 +0000

Can this trick be used by people writing viruses and trojans?

By: Luciano

Luciano — Fri, 25 Sep 2009 12:03:40 +0000

Some years ago I used the same trick in Java, attaching a .exe and a .jar, so the .exe was able to run the VM passing itself as classpath and running the Java app. It worked like a charm, creating a self-contained Java application.

By: adam

adam — Wed, 23 Sep 2009 02:49:32 +0000

In windows at the command line:

copy landscape1.jpg /b + collection.zip /b combined.jpg

By: olli

olli — Wed, 23 Sep 2009 01:58:47 +0000

to do this in Windows (or DOS lol) systems use the concatenating copy option -
“copy file1.jpg+file1.zip newjpgzipcombo.jpg”

or to use the appending version that timekiller mentioned (don’t forget to backup the original jpg if you need it) replace “cat” with “type” -
“type file1.zip >> file2.jpg”

By: onemanclic

onemanclic — Wed, 23 Sep 2009 01:49:34 +0000

Are the image files compressed when they’re in the zip format? In other words, does the file size change when you change the extension? That would be interesting but I doubt it.

By: Jack9

Jack9 — Wed, 23 Sep 2009 01:45:56 +0000

People have been doing this to embed mp3s of commercial Jpop (funny enough, this is serious business and illegal in Japan) since the late 90’s.

By: rabidgremlin

rabidgremlin — Wed, 23 Sep 2009 01:10:21 +0000

Under windows you should be able to use the copy command to join to files:

copy /b file1.jpg + file2.zip combined.jpg

By: L

Wed, 23 Sep 2009 00:41:56 +0000

You can also do something to this effect by putting a .jpg and a .rar in the same folder, and than opening up command prompt and type in cd (wherever the file location is) and than typing in copy /b (imaginename).jpg + (rarname).rar (imagename).jpg
So it’d be something like:
cd C:\Users\L\desktop\filelocation
copy /b Veniversum.jpg + Vi.rar Veniversum.jpg

By: Deuce

Deuce — Wed, 23 Sep 2009 00:41:21 +0000

Doh! Only the other way around: copy file1.jpg+file2.zip file3.jpg

JPEG must come first… and you may need a /b before each filename… experiement!