Detecting callouts to command-and-control (C2) servers used to be straightforward, but attackers in your network have found ways to communicate with the outside world even under the heaviest of scrutiny. In this talk, we discuss ways to use popular websites as means of getting commands and exfiltrating information. We examine the applications of asymmetric communication, from Internet-accessible computers to embedded devices to air-gapped systems. Finally, we give some suggestions to defenders, and discuss how to detect and mitigate risks that enable asymmetric malware.