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tccontre
74 lines
2.8 KiB
YAML
74 lines
2.8 KiB
YAML
name: Detect SharpHound Command-Line Arguments
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id: a0bdd2f6-c2ff-11eb-b918-acde48001122
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version: 1
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date: '2021-06-01'
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author: Michael Haag, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: The following analytic identifies common command-line arguments used
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by SharpHound `-collectionMethod` and `invoke-bloodhound`. Being the script is FOSS,
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function names may be modified, but these changes are dependent upon the operator.
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In most instances the defaults are used. This analytic works to identify the common
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command-line attributes used. It does not cover the entirety of every argument in
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order to avoid false positives.
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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 IN ("*-collectionMethod*","*invoke-bloodhound*")
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by Processes.dest Processes.user Processes.parent_process Processes.process_name
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Processes.process Processes.process_id Processes.parent_process_id | `drop_dm_object_name(Processes)`
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| `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `detect_sharphound_command_line_arguments_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.
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known_false_positives: False positives should be limited as the arguments used are
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specific to SharpHound. Filter as needed or add more command-line arguments as needed.
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references:
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- https://attack.mitre.org/software/S0521/
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- https://thedfirreport.com/?s=bloodhound
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- https://github.com/BloodHoundAD/BloodHound/tree/master/Collectors
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- https://github.com/BloodHoundAD/SharpHound3
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- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1059.001/T1059.001.md#atomic-test-2---run-bloodhound-from-local-disk
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tags:
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analytic_story:
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- Discovery Techniques
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- Ransomware
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automated_detection_testing: passed
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confidence: 80
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context:
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- Source:Endpoint
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- Stage:Discovery
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.001/sharphound/windows-sysmon.log
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impact: 30
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kill_chain_phases:
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- Reconnaissance
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message: Possible SharpHound command-Line arguments identified on $dest$
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mitre_attack_id:
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- T1087.002
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- T1069.001
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- T1482
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- T1087.001
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- T1087
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- T1069.002
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- T1069
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observable:
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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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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
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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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risk_score: 24
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security_domain: endpoint
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