Cybercriminals use images in various ways to infect your computer. In many cases, the same photo not cause problems, it is just a trick to do something stupid.But sometimes a .jpg file will contain malicious code.
Here are some ways in which an image can contain bad news.
As you may have noticed, there is a lot of spam to trick to visit a particular web page-usually one that usually download malware. Images play an important role in this. You probably already know not to click on suspicious emails, but photos can be attached to emails and web pages exist-and do the dirty work when they open the mail.
Fortunately, most modern clients do not show those pictures by default. It is best to keep it that way.
Another trick is the double extension, which takes advantage of the file naming conventions of Windows. If a file is called adorable.jpg.exe, most computers will show it as adorable.jpg. Most users think it’s a harmless image, but it is actually an executable program. And when you run the program, you will likely show an adorable photo while infects your PC.
And finally, there is the art of hiding data in another file type. A .jpg can easily contain additional bits hidden within the image, without significantly affect the appearance of the image. These additional data may include code that is encrypted to make it more difficult to identify.
Fortunately, an altered image can not do much by itself. No viewer will see or know what to do with that code, even if it is not encrypted. But malware developers often break the code into multiple pieces and distributed separately to avoid detection. The information hidden in an image may contain useful instructions to another piece of malware on your computer. See the WP malware removal service for example.
How to protect yourself? Stop watching images can be extreme. There are better methods.
Keep your operating system, browser and antivirus update. Sure, I should do that.
Beware of the photos whose origins are not known.
And finally, Windows to display them extensions. In the Start menu, in the search field, select Folder Options. On the View tab, deselect Hide extensions for known file types.