Jonhnathan
75 lines
2.5 KiB
TOML
75 lines
2.5 KiB
TOML
[metadata]
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creation_date = "2021/07/22"
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integration = ["endpoint", "windows"]
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maturity = "production"
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updated_date = "2024/08/05"
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[rule]
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author = ["Austin Songer"]
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description = """
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Identifies when a user enables DNS-over-HTTPS. This can be used to hide internet activity or the process of exfiltrating
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data. With this enabled, an organization will lose visibility into data such as query type, response, and originating
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IP, which are used to determine bad actors.
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"""
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from = "now-9m"
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index = ["winlogbeat-*", "logs-endpoint.events.registry-*", "logs-windows.sysmon_operational-*", "endgame-*"]
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language = "eql"
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license = "Elastic License v2"
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name = "DNS-over-HTTPS Enabled via Registry"
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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://chromeenterprise.google/policies/?policy=DnsOverHttpsMode",
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]
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risk_score = 21
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rule_id = "a22a09c2-2162-4df0-a356-9aacbeb56a04"
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setup = """## Setup
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2,
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events will not define `event.ingested` and default fallback for EQL rules was not added until version 8.2.
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Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate
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`event.ingested` to @timestamp.
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For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html
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"""
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severity = "low"
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tags = [
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"Domain: Endpoint",
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"OS: Windows",
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"Use Case: Threat Detection",
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"Tactic: Defense Evasion",
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"Data Source: Elastic Endgame",
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"Data Source: Elastic Defend",
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"Data Source: Sysmon",
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]
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timestamp_override = "event.ingested"
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type = "eql"
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query = '''
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registry where host.os.type == "windows" and event.type == "change" and
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(registry.path : "*\\SOFTWARE\\Policies\\Microsoft\\Edge\\BuiltInDnsClientEnabled" and
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registry.data.strings : "1") or
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(registry.path : "*\\SOFTWARE\\Google\\Chrome\\DnsOverHttpsMode" and
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registry.data.strings : "secure") or
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(registry.path : "*\\SOFTWARE\\Policies\\Mozilla\\Firefox\\DNSOverHTTPS" and
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registry.data.strings : "1")
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'''
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[[rule.threat]]
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framework = "MITRE ATT&CK"
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[[rule.threat.technique]]
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id = "T1112"
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name = "Modify Registry"
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reference = "https://attack.mitre.org/techniques/T1112/"
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[[rule.threat.technique]]
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id = "T1562"
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name = "Impair Defenses"
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reference = "https://attack.mitre.org/techniques/T1562/"
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[rule.threat.tactic]
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id = "TA0005"
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name = "Defense Evasion"
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reference = "https://attack.mitre.org/tactics/TA0005/"
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