Find sigma rule 
Attack: Brute Force: Password Spraying
Adversaries may use a single or small list of commonly used passwords against many different accounts to attempt to acquire valid account credentials. Password spraying uses one password (e.g. ‘Password01’), or a small list of commonly used passwords, that may match the complexity policy of the domain. Logins are attempted with that password against many different accounts on a network to avoid account lockouts that would normally occur when brute forcing a single account with many passwords. (Citation: BlackHillsInfosec Password Spraying)
Typically, management services over commonly used ports are used when password spraying. Commonly targeted services include the following:
- SSH (22/TCP)
- Telnet (23/TCP)
- FTP (21/TCP)
- NetBIOS / SMB / Samba (139/TCP & 445/TCP)
- LDAP (389/TCP)
- Kerberos (88/TCP)
- RDP / Terminal Services (3389/TCP)
- HTTP/HTTP Management Services (80/TCP & 443/TCP)
- MSSQL (1433/TCP)
- Oracle (1521/TCP)
- MySQL (3306/TCP)
- VNC (5900/TCP)
In addition to management services, adversaries may “target single sign-on (SSO) and cloud-based applications utilizing federated authentication protocols,” as well as externally facing email applications, such as Office 365.(Citation: US-CERT TA18-068A 2018)
In default environments, LDAP and Kerberos connection attempts are less likely to trigger events over SMB, which creates Windows “logon failure” event ID 4625.
MITRE
Tactic
- credential-access
technique
- T1110.003
Test : Password Spray Invoke-DomainPasswordSpray Light
OS
- windows
Description:
Perform a domain password spray using the same core method of the DomainPasswordSpray tool but without all the extra code that makes the script get blocked by many AVs. This atomic test will attempt a single password against all users in a password list at $env:Temp\usersdpsLight.txt. You can create this file manually or with the automated prereq_command. The prereq_command will limit the user list to 200 users by default to help you avoid massive account lockout.
Executor
powershell
Sigma Rule
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proc_creation_win_powershell_non_interactive_execution.yml (id: f4bbd493-b796-416e-bbf2-121235348529)
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net_connection_win_powershell_network_connection.yml (id: 1f21ec3f-810d-4b0e-8045-322202e22b4b)
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win_security_susp_logon_explicit_credentials.yml (id: 941e5c45-cda7-4864-8cea-bbb7458d194a)