mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Bhavin Patel
63 lines
2.6 KiB
YAML
63 lines
2.6 KiB
YAML
name: PowerShell Invoke CIMMethod CIMSession
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id: 651ee958-a433-471c-b264-39725b788b83
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version: 2
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date: '2024-05-31'
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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 Script Block Logging 4104
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description: The following analytic detects the creation of a New-CIMSession cmdlet
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followed by the use of the Invoke-CIMMethod cmdlet within PowerShell. It leverages
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PowerShell Script Block Logging to identify these specific cmdlets in the ScriptBlockText
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field. This activity is significant because it mirrors the behavior of the Invoke-WMIMethod
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cmdlet, often used for remote code execution via NTLMv2 pass-the-hash authentication.
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If confirmed malicious, this could allow an attacker to execute commands remotely,
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potentially leading to unauthorized access and control over targeted systems.
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search: '`powershell` EventCode=4104 ScriptBlockText IN ("*invoke-CIMMethod*", "*New-CimSession*")
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| stats count min(_time) as firstTime max(_time) as lastTime by Computer EventCode
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ScriptBlockText | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`
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| `powershell_invoke_cimmethod_cimsession_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 may be present based on third-party applications
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or administrators using CIM. It is recommended to apply appropriate filters as needed
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to minimize the number of false positives.
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references:
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- https://learn.microsoft.com/en-us/powershell/module/cimcmdlets/invoke-cimmethod?view=powershell-7.3
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tags:
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analytic_story:
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- Malicious PowerShell
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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: 50
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message: PowerShell was identified running a Invoke-CIMMethod Invoke-CIMSession
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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: 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:
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https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1047/atomic_red_team/4104-cimmethod-windows-powershell.log
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source: XmlWinEventLog:Microsoft-Windows-PowerShell/Operational
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sourcetype: xmlwineventlog
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