Mika Ayenson
a52751494e
* Convert config header to setup in note field * Parse note field into separate setup and note field with marko gfm * only validate and parse note on elastic authored rules and add CLI description for new DR_BYPASS_NOTE_VALIDATION_AND_PARSE environment variable Co-authored-by: brokensound77 <brokensound77@users.noreply.github.com>
57 lines
2.0 KiB
TOML
57 lines
2.0 KiB
TOML
[metadata]
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creation_date = "2021/07/22"
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maturity = "production"
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updated_date = "2022/03/31"
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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.*", "logs-windows.*"]
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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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note = """## Setup
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If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.
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"""
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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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severity = "low"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Defense Evasion"]
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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 event.type in ("creation", "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 = "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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