50 lines
1.8 KiB
YAML
50 lines
1.8 KiB
YAML
title: DNS-over-HTTPS Enabled by Registry
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author: Austin Songer
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date: 2021/07/22
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description: Detects when a user enables DNS-over-HTTPS. This can be used to hide
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internet activity or be used to hide the process of exfiltrating data. With this
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enabled organization will lose visibility into data such as query type, response
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and originating IP that are used to determine bad actors.
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detection:
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SELECTION_1:
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EventID: 12
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SELECTION_2:
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EventID: 13
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SELECTION_3:
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EventID: 14
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SELECTION_4:
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TargetObject: '*\SOFTWARE\Policies\Microsoft\Edge\BuiltInDnsClientEnabled'
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SELECTION_5:
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Details: DWORD (1)
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SELECTION_6:
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TargetObject: '*\SOFTWARE\Google\Chrome\DnsOverHttpsMode'
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SELECTION_7:
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Details: DWORD (secure)
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SELECTION_8:
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TargetObject: '*\SOFTWARE\Policies\Mozilla\Firefox\DNSOverHTTPS\Enabled'
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SELECTION_9:
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Details: DWORD (1)
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condition: ((SELECTION_1 or SELECTION_2 or SELECTION_3) and (((SELECTION_4 and
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SELECTION_5) or (SELECTION_6 and SELECTION_7)) or (SELECTION_8 and SELECTION_9)))
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falsepositives:
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- Unlikely
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id: 04b45a8a-d11d-49e4-9acc-4a1b524407a5
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level: medium
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logsource:
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category: registry_event
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product: windows
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modified: 2021/09/08
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references:
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- https://www.tenforums.com/tutorials/151318-how-enable-disable-dns-over-https-doh-microsoft-edge.html
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- https://github.com/elastic/detection-rules/issues/1371
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- https://chromeenterprise.google/policies/?policy=DnsOverHttpsMode
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- https://admx.help/HKLM/Software/Policies/Mozilla/Firefox/DNSOverHTTPS
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1140
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- attack.t1112
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yml_filename: sysmon_dns_over_https_enabled.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/registry_event
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