Who Controls Thy PC-II?
The file is indeed a jpg file joined with a trojan. But it is a fact that though you can bind an exe file to a jpg one, the final file has to be an exe. What the hacker does is that he renames the file as pic.jpg.exe. ICQ shows this as pic.jpg. So you end up being fooled.
Next time, we will have a look into the working of a trojan horse, it's general features and it's capabilities.
So until next time, bye and safe surfing.