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tccontre
69 lines
2.5 KiB
YAML
69 lines
2.5 KiB
YAML
name: Logon Script Event Trigger Execution
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id: 4c38c264-1f74-11ec-b5fa-acde48001122
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version: 1
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date: '2023-04-14'
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author: Teoderick Contreras, Splunk
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status: production
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type: TTP
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description: This search is to detect a suspicious modification of registry entry
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to persist and gain privilege escalation upon booting up of compromised host. This
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technique was seen in several APT and malware where it modify UserInitMprLogonScript
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registry entry to its malicious payload to be executed upon boot up of the machine.
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data_source:
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- Sysmon Event ID 13
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search: '| tstats `security_content_summariesonly` count min(_time) as firstTime
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max(_time) as lastTime FROM datamodel=Endpoint.Registry where Registry.registry_path
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IN ("*\\Environment\\UserInitMprLogonScript") by Registry.dest Registry.user Registry.registry_path
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Registry.registry_key_name Registry.registry_value_name | `security_content_ctime(lastTime)`
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| `security_content_ctime(firstTime)` | `drop_dm_object_name(Registry)` | `logon_script_event_trigger_execution_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://attack.mitre.org/techniques/T1037/001/
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tags:
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analytic_story:
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- Data Destruction
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- Windows Privilege Escalation
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- Hermetic Wiper
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- Windows Persistence Techniques
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asset_type: Endpoint
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confidence: 100
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impact: 80
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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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- T1037
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- T1037.001
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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_path
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- Registry.registry_key_name
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- Registry.registry_value_name
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risk_score: 80
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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/T1037.001/logonscript_reg/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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