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P4T12ICK
67 lines
2.5 KiB
YAML
67 lines
2.5 KiB
YAML
name: Disable Windows SmartScreen Protection
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id: 664f0fd0-91ff-11eb-a56f-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: The following search identifies a modification of registry to disable
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the smartscreen protection of windows machine. This is windows feature provide an
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early warning system against website that might engage in phishing attack or malware
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distribution. This modification are seen in RAT malware to cover their tracks upon
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downloading other of its component or other payload.
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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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Details: 'Off'
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TargetObject: '*HKLM\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\SmartScreenEnabled'
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condition: selection1
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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 `Registry` node. Also make sure
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that this registry was included in your config files ex. sysmon config to be monitored.
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known_false_positives: admin or user may choose to disable this windows features.
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references:
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- https://tccontre.blogspot.com/2020/01/remcos-rat-evading-windows-defender-av.html
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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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asset_type: Endpoint
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confidence: 50
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impact: 50
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message: The Windows Smartscreen was disabled on $dest$ by $user$.
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mitre_attack_id:
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- T1562.001
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- T1562
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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: Hostname
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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: 25
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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/T1562.001/win_app_defender_disabling/windows-security.log
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source: WinEventLog:Security
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sourcetype: WinEventLog
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update_timestamp: true
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-system.log
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source: WinEventLog:System
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sourcetype: WinEventLog
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update_timestamp: true
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1562.001/win_app_defender_disabling/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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