[Komplex](https://attack.mitre.org/software/S0162) is a backdoor that has been used by [APT28](https://attack.mitre.org/groups/G0007) on OS X and appears to be developed in a similar manner to [XAgentOSX](https://attack.mitre.org/software/S0161) (Citation: XAgentOSX 2017) (Citation: Sofacy Komplex Trojan).