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58 lines
2.9 KiB
YAML
58 lines
2.9 KiB
YAML
name: Headless Browser Usage
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id: 869ba261-c272-47d7-affe-5c0aa85c93d6
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version: 3
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date: '2024-10-17'
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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 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 usage of headless browsers within an organization. It identifies processes containing the "--headless" and "--disable-gpu" command line arguments, which are indicative of headless browsing. This detection leverages data from the Endpoint.Processes datamodel to identify such processes. Monitoring headless browser usage is significant as these tools can be exploited by adversaries for malicious activities like web scraping, automated testing, and undetected web interactions. If confirmed malicious, this activity could lead to unauthorized data extraction, automated attacks, or other covert operations on web applications.
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where (Processes.process="*--headless*" AND Processes.process="*--disable-gpu*") by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id | `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:Microsoft-Windows-Sysmon/Operational
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