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P4T12ICK
63 lines
2.2 KiB
YAML
63 lines
2.2 KiB
YAML
name: Disable UAC Remote Restriction
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id: 9928b732-210e-11ec-b65e-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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status: production
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type: TTP
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description: This analytic is to detect a suspicious modification of registry to disable
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UAC remote restriction. This technique was well documented in Microsoft page where
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attacker may modify this registry value to bypassed UAC feature of windows host.
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This is a good indicator that some tries to bypassed UAC to suspicious process or
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gain privilege escalation.
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data_source:
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- Sysmon Event ID 13
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search:
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selection1:
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Registry.registry_value_name: LocalAccountTokenFilterPolicy
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TargetObject: '*\\CurrentVersion\\Policies\\System*'
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Details: '0x00000001'
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condition: selection1
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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: admin may set this policy for non-critical machine.
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references:
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- https://docs.microsoft.com/en-us/troubleshoot/windows-server/windows-security/user-account-control-and-remote-restriction
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tags:
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analytic_story:
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- Windows Defense Evasion Tactics
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- Suspicious Windows Registry Activities
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- Windows Registry Abuse
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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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- T1548.002
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- T1548
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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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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/T1548.002/LocalAccountTokenFilterPolicy/sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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