mirror of
https://github.com/splunk/security_content
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Gowthamaraj rajendran
80 lines
3.2 KiB
YAML
80 lines
3.2 KiB
YAML
name: Processes launching netsh
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id: b89919ed-fe5f-492c-b139-95dbb162040e
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version: 4
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date: '2021-09-16'
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author: Michael Haag, Josef Kuepker, Splunk
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status: production
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type: Anomaly
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description: This search looks for processes launching netsh.exe. Netsh is a command-line
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scripting utility that allows you to, either locally or remotely, display or modify
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the network configuration of a computer that is currently running. Netsh can be
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used as a persistence proxy technique to execute a helper DLL when netsh.exe is
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executed. In this search, we are looking for processes spawned by netsh.exe and
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executing commands via the command line.
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data_source:
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- Sysmon Event ID 1
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search: '| tstats `security_content_summariesonly` count values(Processes.process)
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AS Processes.process min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes
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where `process_netsh` by Processes.parent_process_name Processes.parent_process
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Processes.original_file_name Processes.process_name Processes.user Processes.dest
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|`drop_dm_object_name("Processes")` |`security_content_ctime(firstTime)` |`security_content_ctime(lastTime)`
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|`processes_launching_netsh_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: Some VPN applications are known to launch netsh.exe. Outside
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of these instances, it is unusual for an executable to launch netsh.exe and run
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commands.
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references:
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- https://www.microsoft.com/en-us/security/blog/2023/05/24/volt-typhoon-targets-us-critical-infrastructure-with-living-off-the-land-techniques/
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tags:
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analytic_story:
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- Netsh Abuse
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- Disabling Security Tools
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- DHS Report TA18-074A
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- Azorult
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- Volt Typhoon
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asset_type: Endpoint
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confidence: 70
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impact: 20
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message: A process $process_name$ has launched netsh with command-line $process$
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on $dest$.
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mitre_attack_id:
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- T1562.004
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- T1562
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observable:
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- name: dest
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type: Hostname
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role:
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- Victim
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- name: user
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type: User
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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.process
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- Processes.parent_process_name
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- Processes.parent_process
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- Processes.process_name
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- Processes.user
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- Processes.dest
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risk_score: 14
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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/T1562.004/atomic_red_team/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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