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root
73 lines
2.6 KiB
YAML
73 lines
2.6 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, Splunk
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type: Hunting
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datamodel:
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- Endpoint
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description: This search is to detect a suspicious commandline that commonly uses
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for enumerating users in active directory. This technique can be a good indicator
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to hunt further TTPs to the machine to check further anomalies. Since this is a
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hunt query expect some noise from administrator or some IT within the network that
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may use this command.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time)
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as lastTime from datamodel=Endpoint.Processes where (Processes.process_name="cmd.exe"
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OR Processes.process_name="powershell*") AND Processes.process = "*Get-ADUser*"
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AND Processes.process = "*-filter*" by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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Processes.parent_process_name | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `get_aduser_with_powershell_filter`'
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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: network admin may use this command.
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references:
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- https://jpcertcc.github.io/ToolAnalysisResultSheet/details/dsquery.htm
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tags:
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analytic_story:
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- Active Directory Discovery
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1087.002/AD_discovery/windows-sysmon.log
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kill_chain_phases:
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- Reconnaissance
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mitre_attack_id:
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- T1087.002
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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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required_fields:
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- _time
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- Processes.dest
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- Processes.user
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- Processes.parent_process
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- Processes.process_name
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- Processes.process
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- Processes.process_id
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- Processes.parent_process_id
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- Processes.parent_process_name
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security_domain: endpoint
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impact: 50
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confidence: 50
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risk_score: 25
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context:
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- Source:Endpoint
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- Stage:Reconnaissance
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message: an instance of process $process_name$ with commandline $process$ in $dest$
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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: Parent Process
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role:
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- Parent Process
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automated_detection_testing: passed
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