mirror of
https://github.com/splunk/security_content
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Michael Haag
60 lines
2.8 KiB
YAML
60 lines
2.8 KiB
YAML
name: Headless Browser Usage
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id: 869ba261-c272-47d7-affe-5c0aa85c93d6
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version: 1
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date: '2023-09-08'
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author: Michael Haag, Splunk
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status: production
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type: Hunting
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data_source:
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- Sysmon Event ID 1
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description: 'The following hunting analytic is designed to detect the usage of headless browsers in an organization. Headless browsers are web browsers without a graphical user interface and are operated via a command line interface or network requests. They are often used for automating tasks but can also be utilized by adversaries for malicious activities such as web scraping, automated testing, and performing actions on web pages without detection. The detection is based on the presence of "--headless" and "--disable-gpu" command line arguments which are commonly used in headless browsing.'
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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
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(Processes.process="*--headless*" AND Processes.process="*--disable-gpu*") by Processes.dest Processes.user Processes.parent_process
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Processes.process_name Processes.process Processes.process_id Processes.parent_process_id
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| `drop_dm_object_name(Processes)` | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)`| `headless_browser_usage_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product.
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known_false_positives: This hunting analytic is meant to assist with baselining and understanding headless browsing in use. Filter as needed.
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references:
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- https://cert.gov.ua/article/5702579
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tags:
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analytic_story:
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- Forest Blizzard
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asset_type: endpoint
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atomic_guid: []
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confidence: 50
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impact: 30
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message: Behavior related to headless browser usage detected on $dest$ by $user$.
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mitre_attack_id:
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- T1564.003
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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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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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- Processes.dest
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- Processes.user
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- Processes.parent_process
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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_id
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- sourcetype
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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/T1185/headlessbrowser/headless_mockbin.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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