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root
74 lines
3.0 KiB
YAML
74 lines
3.0 KiB
YAML
name: Disable Security Logs Using MiniNt Registry
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id: 39ebdc68-25b9-11ec-aec7-acde48001122
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version: 2
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date: '2022-01-27'
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author: Teoderick Contreras, Splunk
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type: TTP
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datamodel:
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- Endpoint
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description: This analytic is to detect a suspicious registry modification to disable
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security audit logs. This technique was shared by a researcher to disable Security
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logs of windows by adding this registry. The Windows will think it is WinPE and
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will not log any event to the Security Log
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search: '| tstats `security_content_summariesonly` count FROM datamodel=Endpoint.Registry
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where Registry.registry_path="*\\Control\\MiniNt\\*" by _time span=1h Registry.dest
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Registry.user Registry.registry_path Registry.registry_value_name Registry.registry_value_data
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Registry.process_guid | `drop_dm_object_name(Registry)` |rename process_guid as
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proc_guid |join proc_guid, _time [| tstats `security_content_summariesonly` count
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FROM datamodel=Endpoint.Processes by _time span=1h Processes.process_id Processes.process_name
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Processes.process Processes.dest Processes.parent_process_name Processes.parent_process
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Processes.process_guid | `drop_dm_object_name(Processes)` |rename process_guid as
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proc_guid | fields _time dest user parent_process_name parent_process process_name
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process_path process proc_guid registry_path registry_value_name registry_value_data]
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| table _time dest user parent_process_name parent_process process_name process_path
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process proc_guid registry_path registry_value_name registry_value_data | `disable_security_logs_using_minint_registry_filter`'
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how_to_implement: To successfully implement this search, you must be ingesting data
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that records registry activity from your hosts to populate the endpoint data model
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in the registry node. This is typically populated via endpoint detection-and-response
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product, such as Carbon Black or endpoint data sources, such as Sysmon. The data
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used for this search is typically generated via logs that report reads and writes
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to the registry.
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known_false_positives: Unknown.
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references:
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- https://twitter.com/0gtweet/status/1182516740955226112
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tags:
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analytic_story:
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- Windows Defense Evasion Tactics
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- Windows Registry Abuse
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confidence: 100
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context:
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- Source:Endpoint
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- Stage:Defense Evasion
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1112/minint_reg/sysmon.log
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impact: 80
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kill_chain_phases:
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- Exploitation
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message: modified/added/deleted registry entry $Registry.registry_path$ in $dest$
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mitre_attack_id:
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- T1112
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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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- name: user
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type: User
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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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- Registry.dest
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- Registry.user
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- Registry.registry_value_name
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- Registry.registry_key_name
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- Registry.registry_path
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- Registry.registry_value_data
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risk_score: 80
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security_domain: endpoint
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asset_type: Endpoint
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