mirror of
https://github.com/splunk/security_content
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Bhavin Patel
60 lines
2.5 KiB
YAML
60 lines
2.5 KiB
YAML
name: PowerShell Invoke WmiExec Usage
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id: 0734bd21-2769-4972-a5f1-78bb1e011224
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version: 2
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date: '2024-05-14'
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author: Michael Haag, Splunk
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type: TTP
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status: production
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data_source:
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- Powershell Script Block Logging 4104
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description: The following analytic detects the execution of the Invoke-WMIExec utility
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within PowerShell Script Block Logging (EventCode 4104). This detection leverages
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PowerShell script block logs to identify instances where the Invoke-WMIExec command
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is used. Monitoring this activity is crucial as it indicates potential lateral movement
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using WMI commands with NTLMv2 pass-the-hash authentication. If confirmed malicious,
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this activity could allow an attacker to execute commands remotely on target systems,
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potentially leading to further compromise and lateral spread within the network.
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search: '`powershell` EventCode=4104 ScriptBlockText IN ("*invoke-wmiexec*") | stats
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count min(_time) as firstTime max(_time) as lastTime by Computer EventCode ScriptBlockText
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `powershell_invoke_wmiexec_usage_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: False positives should be limited as this analytic is designed
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to detect a specific utility. It is recommended to apply appropriate filters as
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needed to minimize the number of false positives.
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references:
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- https://github.com/Kevin-Robertson/Invoke-TheHash/blob/master/Invoke-WMIExec.ps1
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tags:
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analytic_story:
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- Suspicious WMI Use
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asset_type: Endpoint
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confidence: 100
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impact: 100
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message: PowerShell was identified running a Invoke-WmiExec on $Computer$.
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mitre_attack_id:
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- T1047
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observable:
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- name: Computer
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type: Hostname
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role:
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- Victim
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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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- EventCode
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- ScriptBlockText
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- Computer
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risk_score: 100
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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/T1047/atomic_red_team/invokewmiexec_windows-powershell.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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