Hi guys.... there is a hooks or plugin or other to put social icons ('follow us')... for example, tumblr, twitter, youtube, instagram, etc (also, hyperlinked icons/images)...

On the bar of FORUM?

Like this?

https://www.vbulletin.org/forum/external/2018/02/8.jpg

I think you used the wrong forum!
Please don't use this one for questions!

You could post it here (only one please :-)):
https://www.vbulletin.org/forum/forumdisplay.php?f=112
https://www.vbulletin.org/forum/forumdisplay.php?f=30
https://www.vbulletin.org/forum/forumdisplay.php?f=263