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https://github.com/splunk/security_content
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pyth0n1c
87 lines
3.3 KiB
YAML
87 lines
3.3 KiB
YAML
name: Windows NirSoft Utilities
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id: 5b2f4596-7d4c-11ec-88a7-acde48001122
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version: 1
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date: '2023-04-14'
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author: Michael Haag, Splunk
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status: production
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type: Hunting
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description: The following hunting analytic assists with identifying the proces execution
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of commonly used utilities from NirSoft. Potentially not adversary behavior, but
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worth identifying to know if the software is present and being used.
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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 by Processes.dest Processes.user Processes.parent_process_name
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Processes.process_name Processes.process Processes.original_file_name Processes.process_path
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Processes.process_id Processes.parent_process_id | `drop_dm_object_name("Processes")`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `is_nirsoft_software`
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| `windows_nirsoft_utilities_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: False positives may be present. Filtering may be required before
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setting to alert.
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references:
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- https://www.cisa.gov/uscert/ncas/alerts/TA18-201A
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- http://www.nirsoft.net/
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- https://www.microsoft.com/security/blog/2022/01/15/destructive-malware-targeting-ukrainian-organizations/
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tags:
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analytic_story:
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- Data Destruction
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- WhisperGate
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asset_type: Endpoint
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confidence: 100
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impact: 80
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message: An instance of $parent_process_name$ spawning $process_name$ was identified
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on endpoint $dest$ by user $user$ related to NiRSoft software usage.
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mitre_attack_id:
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- T1588.002
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observable:
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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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- name: dest
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type: Endpoint
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role:
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- Victim
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- name: parent_process_name
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type: Process
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role:
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- Parent Process
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- name: process_name
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type: Process
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role:
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- Child Process
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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: 80
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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/T1588.002/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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