Adversaries may create a domain account to maintain access to victim systems. Domain accounts are those managed by Active Directory Domain Services where access and permissions are configured across systems and services that are part of that domain. Domain accounts can cover user, administrator, and service accounts. With a sufficient level of access, the <code>net user /add /domain</code> command can be used to create a domain account.(Citation: Savill 1999)

Such accounts may be used to establish secondary credentialed access that do not require persistent remote access tools to be deployed on the system.
Domain Account
source_name: mitre-attack  url: https://attack.mitre.org/techniques/T1136/002  external_id: T1136.002     source_name: Microsoft User Creation Event  description: Lich, B., Miroshnikov, A. (2017, April 5). 4720(S): A user account was created. Retrieved June 30, 2017.  url: https://docs.microsoft.com/en-us/windows/security/threat-protection/auditing/event-4720     source_name: Savill 1999  description: Savill, J. (1999, March 4). Net.exe reference. Retrieved September 22, 2015.  url: https://web.archive.org/web/20150511162820/http://windowsitpro.com/windows/netexe-reference     