Facebook: Iranian advanced persistent threat group used social network to spread malware and conduct cyberespionage operations. Group dubbed Tortoiseshell plotted to target military personnel and companies in the defense and aerospace industries in the U.S. and Europe. Facebook blocked the malicious domains the group created from being shared on its platform, took down the group’s accounts and notified those believed to have been targeted. The APT group’s activity on Facebook focused on social engineering, attempting to lure users off the social network where they could be exposed to malware.”]
Source: https://www.cuinfosecurity.com/facebook-disrupts-iranian-apt-campaign-a-17082