Find sigma rule 
Attack: Create Account: Local Account
Adversaries may create a local account to maintain access to victim systems. Local accounts are those configured by an organization for use by users, remote support, services, or for administration on a single system or service.
For example, with a sufficient level of access, the Windows net user /add command can be used to create a local account. On macOS systems the dscl -create command can be used to create a local account. Local accounts may also be added to network devices, often via common Network Device CLI commands such as username, or to Kubernetes clusters using the kubectl utility.(Citation: cisco_username_cmd)(Citation: Kubernetes Service Accounts Security)
Such accounts may be used to establish secondary credentialed access that do not require persistent remote access tools to be deployed on the system.
MITRE
Tactic
- persistence
technique
- T1136.001
Test : Create a new user in PowerShell
OS
- windows
Description:
Creates a new user in PowerShell. Upon execution, details about the new account will be displayed in the powershell session. To verify the new account, run “net user” in powershell or CMD and observe that there is a new user named “T1136.001_PowerShell”
Executor
powershell
Sigma Rule
- posh_ps_create_local_user.yml (id: 243de76f-4725-4f2e-8225-a8a69b15ad61)