mirror of
https://github.com/splunk/security_content
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Gowthamaraj rajendran
97 lines
4.2 KiB
YAML
97 lines
4.2 KiB
YAML
name: Possible Lateral Movement PowerShell Spawn
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id: cb909b3e-512b-11ec-aa31-3e22fbd008af
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version: 1
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date: '2023-04-14'
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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 is designed to identify possible lateral movement
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attacks that involve the spawning of a PowerShell process as a child or grandchild
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process of commonly abused processes. These processes include services.exe, wmiprsve.exe,
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svchost.exe, wsmprovhost.exe, and mmc.exe.\
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Such behavior is indicative of legitimate Windows features such as the Service Control
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Manager, Windows Management Instrumentation, Task Scheduler, Windows Remote Management,
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and the DCOM protocol being abused to start a process on a remote endpoint. This
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behavior is often seen during lateral movement techniques where adversaries or red
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teams abuse these services for lateral movement and remote code execution.'
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data_source:
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- Sysmon Event ID 1
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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.parent_process_name=wmiprvse.exe
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OR Processes.parent_process_name=services.exe OR Processes.parent_process_name=svchost.exe
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OR Processes.parent_process_name=wsmprovhost.exe OR Processes.parent_process_name=mmc.exe)
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(Processes.process_name=powershell.exe OR (Processes.process_name=cmd.exe AND Processes.process=*powershell.exe*)
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OR Processes.process_name=pwsh.exe OR (Processes.process_name=cmd.exe AND Processes.process=*pwsh.exe*))
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by Processes.dest Processes.user Processes.parent_process_name Processes.process_name
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Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `possible_lateral_movement_powershell_spawn_filter`'
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how_to_implement: The detection is based on data that originates from Endpoint Detection
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and Response (EDR) agents. These agents are designed to provide security-related
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telemetry from the endpoints where the agent is installed. To implement this search,
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you must ingest logs that contain the process GUID, process name, and parent process.
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Additionally, you must ingest complete command-line executions. These logs must
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be processed using the appropriate Splunk Technology Add-ons that are specific to
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the EDR product. The logs must also be mapped to the `Processes` node of the `Endpoint`
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data model. Use the Splunk Common Information Model (CIM) to normalize the field
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names and speed up the data modeling process.
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known_false_positives: Legitimate applications may spawn PowerShell as a child process
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of the the identified processes. Filter as needed.
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references:
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- https://attack.mitre.org/techniques/T1021/003/
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- https://attack.mitre.org/techniques/T1021/006/
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- https://attack.mitre.org/techniques/T1047/
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- https://attack.mitre.org/techniques/T1053/005/
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- https://attack.mitre.org/techniques/T1543/003/
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tags:
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analytic_story:
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- Active Directory Lateral Movement
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- Malicious PowerShell
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- Hermetic Wiper
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- Data Destruction
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- Scheduled Tasks
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asset_type: Endpoint
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confidence: 50
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impact: 90
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message: A PowerShell process was spawned as a child process of typically abused
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processes on $dest$
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mitre_attack_id:
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- T1021
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- T1021.003
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- T1021.006
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- T1047
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- T1053.005
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- T1543.003
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- T1059.001
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- T1218.014
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observable:
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- name: dest
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type: Endpoint
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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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- Processes.dest
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- Processes.user
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.original_file_name
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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_path
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- Processes.process_path
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- Processes.parent_process_id
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risk_score: 45
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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/T1543.003/lateral_movement_powershell/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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