Apparently this is legit-
www.gdatasoftware.com
Yikes. I guess they’ll have a security update soon, but in the meantime probably best to steer clear of profile pics and other odd user content.

Picture this: Hiding Malware in Images
A previously unreported method of hosting malware abuses the popular gaming platform Steam to hide malware in an unusual place: Profile pictures. Learn more on the G DATA Blog.

Yikes. I guess they’ll have a security update soon, but in the meantime probably best to steer clear of profile pics and other odd user content.