[Skeleton Key](https://attack.mitre.org/software/S0007) is malware used to inject false credentials into domain controllers with the intent of creating a backdoor password. (Citation: Dell Skeleton) Functionality similar to [Skeleton Key](https://attack.mitre.org/software/S0007) is included as a module in [Mimikatz](https://attack.mitre.org/software/S0002).