Get ADDefaultDomainPasswordPolicy with Powershell Script Block

Name:Get ADDefaultDomainPasswordPolicy with Powershell Script Block
id:1ff7ccc8-065a-11ec-91e4-acde48001122
version:6
date:2024-11-13
author:Teoderick Contreras, Mauricio Velazco, Splunk
status:production
type:Hunting
Description:The following analytic detects the execution of the `Get-ADDefaultDomainPasswordPolicy` PowerShell cmdlet, which is used to retrieve the password policy in a Windows domain. This detection leverages PowerShell Script Block Logging (EventCode=4104) to identify the specific command execution. Monitoring this activity is significant as it can indicate an attempt to gather domain policy information, which is often a precursor to further malicious actions. If confirmed malicious, this activity could allow an attacker to understand password policies, aiding in password attacks or further domain enumeration.
Data_source:

• -Powershell Script Block Logging 4104

search:`powershell` EventCode=4104 ScriptBlockText ="*Get-ADDefaultDomainPasswordPolicy*"
| fillnull
| stats count min(_time) as firstTime max(_time) as lastTime by dest signature signature_id user_id vendor_product EventID Guid Opcode Name Path ProcessID ScriptBlockId ScriptBlockText
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `get_addefaultdomainpasswordpolicy_with_powershell_script_block_filter`

how_to_implement:The following Hunting analytic requires PowerShell operational logs to be imported. Modify the powershell macro as needed to match the sourcetype or add index. This analytic is specific to 4104, or PowerShell Script Block Logging.
known_false_positives:Administrators or power users may use this command for troubleshooting.
References:
  -https://github.com/S1ckB0y1337/Active-Directory-Exploitation-Cheat-Sheet
  -https://attack.mitre.org/techniques/T1201/
  -https://docs.microsoft.com/en-us/powershell/module/activedirectory/get-addefaultdomainpasswordpolicy?view=windowsserver2019-ps
drilldown_searches:
  :
tags:
  analytic_story:
    - 'Active Directory Discovery'
  asset_type:Endpoint
  mitre_attack_id:
    - 'T1201'
  product:
    - 'Splunk Enterprise'
    - 'Splunk Enterprise Security'
    - 'Splunk Cloud'
  security_domain:endpoint

tests:
 name:'True Positive Test'
 attack_data:
  data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1201/pwd_policy_discovery/windows-powershell-xml.log
  source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
  sourcetype: XmlWinEventLog
manual_test:None