[Quest™]

One of my friends was infected so every time he hit a certain letter a message would send, "You need to update your Skype to see sent emoticons Go here to download (download link)".

If you see this it's kind of common sense that it's a RAT.

[Quest™]

It's not a RAT, it's some stupid Adware/Spyware in my opinion.
You're talking about the program "Skypemoticons" or something.

Yeah, well just exaggerating on the effects on it.