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P4T12ICK
56 lines
2.1 KiB
YAML
56 lines
2.1 KiB
YAML
name: Windows System File on Disk
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id: 993ce99d-9cdd-42c7-a2cf-733d5954e5a6
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version: 2
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date: '2022-05-16'
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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 will assist with identifying new .sys
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files introduced in the environment. This query is meant to identify sys file creates
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on disk. There will be noise, but reducing common process names or applications
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should help to limit any volume. The idea is to identify new sys files written to
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disk and identify them before they're added as a new kernel mode driver.
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data_source:
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- Sysmon Event ID 11
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search:
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selection1:
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Filesystem.file_name: '*.sys*'
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condition: selection1
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how_to_implement: To successfully implement this search you need to be ingesting information
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on files from your endpoints into the `Endpoint` datamodel in the `Filesystem` node.
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In addition, confirm the latest CIM App 4.20 or higher is installed and the latest
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TA for the endpoint product. In addition, filtering may occur by adding NOT (Filesystem.file_path
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IN ("*\\Windows\\*", "*\\Program File*", "*\\systemroot\\*","%SystemRoot%*", "system32\*")).
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This will level out the noise generated to potentally lead to generating notables.
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known_false_positives: False positives will be present. Filter as needed.
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references:
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- https://redcanary.com/blog/tracking-driver-inventory-to-expose-rootkits/
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tags:
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analytic_story:
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- Windows Drivers
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- CISA AA22-264A
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asset_type: Endpoint
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confidence: 50
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impact: 20
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message: A new driver is present on $dest$.
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mitre_attack_id:
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- T1068
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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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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: 10
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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/T1068/drivers/sysmon_sys_filemod.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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update_timestamp: true
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