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P4T12ICK
67 lines
2.1 KiB
YAML
67 lines
2.1 KiB
YAML
name: Get ADUser with PowerShell
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id: 0b6ee3f4-04e3-11ec-a87d-acde48001122
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version: 1
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date: '2021-08-24'
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author: Teoderick Contreras, Mauricio Velazco, Splunk
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status: production
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type: Hunting
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description: This analytic looks for the execution of `powershell.exe` with command-line
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arguments utilized to enumerate domain users. The `Get-AdUser' commandlet returns
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a list of all domain users. Red Teams and adversaries alike may use this commandlet
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to identify remote systems for situational awareness and Active Directory Discovery.
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data_source:
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- Sysmon Event ID 1
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search:
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selection1:
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CommandLine: '*Get-ADUser*'
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Image|endswith:
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- powershell*
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- cmd.exe
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selection2:
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CommandLine: '*-filter*'
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condition: selection1 and selection2
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how_to_implement: To successfully implement this search, you need to be ingesting
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logs with the process name, parent process, and command-line executions from your
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endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
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Sysmon TA.
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known_false_positives: Administrators or power users may use this command for troubleshooting.
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references:
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- https://www.blackhillsinfosec.com/red-blue-purple/
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- https://attack.mitre.org/techniques/T1087/002/
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- https://docs.microsoft.com/en-us/powershell/module/activedirectory/get-aduser?view=windowsserver2019-ps
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tags:
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analytic_story:
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- Active Directory Discovery
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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: an instance of process $process_name$ with commandline $process$ in $dest$
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mitre_attack_id:
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- T1087.002
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- T1087
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observable:
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- name: user
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type: User
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role:
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- Victim
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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risk_score: 25
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security_domain: endpoint
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1087.002/AD_discovery/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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