How Hackers Can Disguise Malicious Programs With Fake File Extensions

File extensions can be faked – that file with an .mp3 extension may actually be an executable program. Hackers can fake file extensions by abusing a special Unicode character, forcing text to be displayed in reverse order. Windows also hides file extensions by default, which is another way novice users can be deceived – a file with a name like picture.jpg.exe will appear as a harmless JPEG image file.

http://www.howtogeek.com/127154/how-hackers-can-disguise-malicious-programs-with-fake-file-extensions/

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Good info. Have to admit, I wasn't aware of the Unicode trick :emotion-15: .