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Patrick
81 lines
3.5 KiB
YAML
81 lines
3.5 KiB
YAML
name: Windows Process Commandline Discovery
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id: 67d2a52e-a7e2-4a5d-ae44-a21212048bc2
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version: 2
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date: '2024-05-20'
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author: Teoderick Contreras, Splunk
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status: production
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type: Hunting
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data_source:
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- Sysmon EventID 1
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- Windows Event Log Security 4688
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- CrowdStrike ProcessRollup2
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description: The following analytic detects the use of Windows Management Instrumentation
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Command-line (WMIC) to retrieve information about running processes, specifically
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targeting the command lines used to launch those processes. This detection leverages
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data from Endpoint Detection and Response (EDR) agents, focusing on logs containing
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process details and command-line executions. This activity is significant as it
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may indicate suspicious behavior, such as a user or process gathering detailed process
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information, which is uncommon for non-technical users. If confirmed malicious,
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this could allow an attacker to gain insights into running processes, aiding in
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further exploitation or lateral movement.
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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 `process_wmic` Processes.process=
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"* process *" Processes.process= "* get commandline *" by Processes.dest Processes.user
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Processes.parent_process Processes.process_name Processes.process Processes.process_id
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Processes.parent_process_id | `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)` | `windows_process_commandline_discovery_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: Administrators or power users may use this command for troubleshooting.
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Filter as needed.
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references:
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- https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-347a
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tags:
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analytic_story:
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- CISA AA23-347A
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asset_type: Endpoint
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confidence: 50
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impact: 30
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message: Activity related to process commandline discovery detected on $dest$ using
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wmic.exe.
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mitre_attack_id:
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- T1057
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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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risk_score: 15
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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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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/T1057/process_commandline_discovery/wmic-cmdline-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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