Justin Ibarra
46d5e37b76
* min_stack all rules to 8.3 * bump date Co-authored-by: Mika Ayenson <mika.ayenson@elastic.co>
57 lines
1.8 KiB
TOML
57 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2021/07/15"
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maturity = "production"
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min_stack_comments = "New fields added: required_fields, related_integrations, setup"
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min_stack_version = "8.3.0"
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updated_date = "2022/08/24"
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integration = "o365"
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[rule]
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author = ["Austin Songer"]
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description = """
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Identifies when Microsoft Cloud App Security reports that a user has uploaded files to the cloud that might be infected
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with ransomware.
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"""
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false_positives = [
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"""
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If Cloud App Security identifies, for example, a high rate of file uploads or file deletion activities it may represent an adverse
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encryption process.
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""",
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]
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from = "now-30m"
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index = ["filebeat-*", "logs-o365*"]
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language = "kuery"
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license = "Elastic License v2"
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name = "Microsoft 365 Potential ransomware activity"
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note = """## Setup
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The Office 365 Logs Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule.
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"""
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references = [
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"https://docs.microsoft.com/en-us/cloud-app-security/anomaly-detection-policy",
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"https://docs.microsoft.com/en-us/cloud-app-security/policy-template-reference",
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]
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risk_score = 47
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rule_id = "721999d0-7ab2-44bf-b328-6e63367b9b29"
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severity = "medium"
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tags = ["Elastic", "Cloud", "Microsoft 365", "Continuous Monitoring", "SecOps", "Configuration Audit"]
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timestamp_override = "event.ingested"
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type = "query"
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query = '''
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event.dataset:o365.audit and event.provider:SecurityComplianceCenter and event.category:web and event.action:"Potential ransomware activity" and event.outcome:success
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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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name = "Data Encrypted for Impact"
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reference = "https://attack.mitre.org/techniques/T1486/"
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id = "T1486"
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[rule.threat.tactic]
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name = "Impact"
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reference = "https://attack.mitre.org/tactics/TA0040/"
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id = "TA0040"
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