mirror of
https://github.com/splunk/security_content
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Bhavin Patel
51 lines
2.5 KiB
YAML
51 lines
2.5 KiB
YAML
name: Windows PowerShell Get CIMInstance Remote Computer
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id: d8c972eb-ed84-431a-8869-ca4bd83257d1
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version: 1
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date: '2023-03-27'
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author: Michael Haag, Splunk
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type: Anomaly
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status: production
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data_source:
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- Powershell 4104
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description: This analytic identifies the use of Get-CimInstance cmdlet with the -ComputerName parameter, which indicates that the cmdlet is being used to retrieve information from a remote computer. This can be useful for detecting instances of remote access, such as when an attacker uses PowerShell to connect to a remote system and gather information. By monitoring for this cmdlet with the -ComputerName parameter, security analysts can identify potential malicious activity on remote systems and take appropriate action to mitigate any threats.
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search: '`powershell` EventCode=4104 ScriptBlockText="*get-ciminstance*" AND ScriptBlockText="*computername*" | stats count min(_time) as firstTime max(_time) as lastTime by EventCode ScriptBlockText Computer user_id
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_powershell_get_ciminstance_remote_computer_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: This is meant to be a low risk RBA anomaly analytic or to be used for hunting. Enable this with a low risk score and let it generate risk in the risk index.
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references:
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- https://learn.microsoft.com/en-us/powershell/module/cimcmdlets/get-ciminstance?view=powershell-7.3
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tags:
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analytic_story:
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- Active Directory Lateral Movement
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asset_type: Endpoint
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confidence: 50
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impact: 30
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message: A PowerShell Cmdlet Get-CIMInstnace was ran on $Computer$, attempting to connect to a remote host.
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mitre_attack_id:
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- T1059.001
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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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- ScriptBlockText
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- Computer
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- EventCode
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risk_score: 15
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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/T1059.001/atomic_red_team/get_ciminstance_windows-powershell.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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