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https://github.com/splunk/security_content
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pyth0n1c
68 lines
3.2 KiB
YAML
68 lines
3.2 KiB
YAML
name: GetDomainController with PowerShell Script Block
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id: 676b600a-a94d-4951-b346-11329431e6c1
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version: 5
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date: '2024-11-13'
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author: Mauricio Velazco, Splunk
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status: production
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type: TTP
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description: The following analytic detects the execution of the `Get-DomainController`
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commandlet using PowerShell Script Block Logging (EventCode=4104). This commandlet
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is part of PowerView, a tool often used for domain enumeration. The detection leverages
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script block text to identify this specific activity. Monitoring this behavior is
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crucial as it may indicate an adversary or Red Team performing reconnaissance to
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map out domain controllers. If confirmed malicious, this activity could lead to
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further domain enumeration, potentially exposing sensitive information and aiding
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in lateral movement within the network.
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data_source:
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- Powershell Script Block Logging 4104
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search: '`powershell` EventCode=4104 (ScriptBlockText = "*Get-DomainController*")
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| stats count min(_time) as firstTime max(_time) as lastTime by Opcode Computer
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UserID EventCode ScriptBlockText | `security_content_ctime(firstTime)` | `getdomaincontroller_with_powershell_script_block_filter`'
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how_to_implement: To successfully implement this analytic, you will need to enable
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PowerShell Script Block Logging on some or all endpoints. Additional setup here
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https://docs.splunk.com/Documentation/UBA/5.0.4.1/GetDataIn/AddPowerShell#Configure_module_logging_for_PowerShell.
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known_false_positives: Administrators or power users may use this PowerShell commandlet
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for troubleshooting.
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references:
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- https://attack.mitre.org/techniques/T1018/
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- https://powersploit.readthedocs.io/en/latest/Recon/Get-DomainController/
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drilldown_searches:
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- name: View the detection results for - "$Computer$"
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search: '%original_detection_search% | search Computer = "$Computer$"'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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- name: View risk events for the last 7 days for - "$Computer$"
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search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$Computer$")
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starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
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values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
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as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
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as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`'
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earliest_offset: $info_min_time$
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latest_offset: $info_max_time$
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rba:
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message: Remote system discovery with PowerView on $Computer$ by $UserID$
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risk_objects:
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- field: Computer
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type: system
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score: 24
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threat_objects: []
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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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mitre_attack_id:
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- T1018
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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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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:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.001/powershell_script_block_logging/getdc.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: XmlWinEventLog
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