Justin Ibarra
71 lines
1.9 KiB
TOML
71 lines
1.9 KiB
TOML
[metadata]
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creation_date = "2020/09/02"
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maturity = "development"
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query_schema_validation = false
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updated_date = "2021/03/03"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies .url shortcut files downloaded from outside the local network. These shortcut files are commonly used in
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phishing campaigns.
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"""
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from = "now-9m"
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index = ["logs-endpoint.events.*", "winlogbeat-*", "logs-windows.*"]
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language = "eql"
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license = "Elastic License v2"
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name = "Downloaded URL Files"
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risk_score = 21
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rule_id = "cd82e3d6-1346-4afd-8f22-38388bbf34cb"
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severity = "medium"
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tags = ["Elastic", "Host", "Windows", "Threat Detection", "Execution"]
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type = "eql"
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query = '''
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/* leaving in development pending `file.Ext.windows.zone_identifier` landing in ECS then endpoint */
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sequence by process.entity_id with maxspan=2s
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[file where event.type == "creation" and file.extension == "url" and
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not process.name == "explorer.exe"]
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[file where event.type == "creation" and file.extension == "url:Zone.Identifier" and
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/* non-ECS field - may disqualify conversion */
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file.Ext.windows.zone_identifier > 1 and not process.name == "explorer.exe"]
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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 = "T1204"
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name = "User Execution"
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reference = "https://attack.mitre.org/techniques/T1204/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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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 = "T1566"
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name = "Phishing"
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reference = "https://attack.mitre.org/techniques/T1566/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.001"
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name = "Spearphishing Attachment"
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reference = "https://attack.mitre.org/techniques/T1566/001/"
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[[rule.threat.technique.subtechnique]]
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id = "T1566.002"
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name = "Spearphishing Link"
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reference = "https://attack.mitre.org/techniques/T1566/002/"
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[rule.threat.tactic]
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id = "TA0001"
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name = "Initial Access"
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reference = "https://attack.mitre.org/tactics/TA0001/"
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