What is iframe3 and why did it download itself onto my computer?

[nelfi0]

I logged into Facebook today and before the page fully loaded this file called iframe3.gz downloaded itself onto my computer. I was terrified that someone had hacked into my computer and was trying to give e some sort of virus or spyware so I deleted it and switched to my personal hotspot.

Does anyone know what this file really is?

[Duncan]

It is an old Windows Trojan.

http://www.sophos.com/en-us/threat-cente...me-GZ.aspx

You should probably thoroughly scan your computer to ensure it is healthy.