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Patrick
77 lines
2.9 KiB
YAML
77 lines
2.9 KiB
YAML
name: Headless Browser Usage
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id: 869ba261-c272-47d7-affe-5c0aa85c93d6
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version: 2
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date: '2024-05-26'
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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
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an organization. It identifies processes containing the "--headless" and "--disable-gpu"
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command line arguments, which are indicative of headless browsing. This detection
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leverages data from the Endpoint.Processes datamodel to identify such processes.
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Monitoring headless browser usage is significant as these tools can be exploited
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by adversaries for malicious activities like web scraping, automated testing, and
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undetected web interactions. If confirmed malicious, this activity could lead to
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unauthorized data extraction, automated attacks, or other covert operations on web
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applications.'
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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 (Processes.process="*--headless*"
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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)`|
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`headless_browser_usage_filter`'
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how_to_implement: To successfully implement this search you need to be ingesting information
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on process that include the name of the process responsible for the changes from
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your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
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confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
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endpoint product.
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known_false_positives: This hunting analytic is meant to assist with baselining and
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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:
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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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