[CASTLETAP](https://attack.mitre.org/software/S1224) is an ICMP port knocking backdoor that has been installed on compromised FortiGate firewalls by [UNC3886](https://attack.mitre.org/groups/G1048).(Citation: Mandiant Fortinet Zero Day)
Actors that use this
0 tracked actors
No tracked actor uses this yet
Not linked to any of our tracked MENA actors in actor_software — still browsable via the ATT&CK dictionary above.