Jonhnathan
b4c84e8a40
* Update Tags * Bump updated date separately to be easy to revert if needed * Update resource_development_ml_linux_anomalous_compiler_activity.toml * Apply changes from the discussion * Update persistence_init_d_file_creation.toml * Update defense_evasion_timestomp_sysmon.toml * Update defense_evasion_application_removed_from_blocklist_in_google_workspace.toml * Update missing Tactic tags * Update unit tests to match new tags * Add missing IG tags * Delete okta_threat_detected_by_okta_threatinsight.toml * Update command_and_control_google_drive_malicious_file_download.toml * Update persistence_rc_script_creation.toml * Mass bump * Update persistence_shell_activity_by_web_server.toml * . --------- Co-authored-by: Mika Ayenson <Mika.ayenson@elastic.co> Co-authored-by: Mika Ayenson <Mikaayenson@users.noreply.github.com>
59 lines
1.8 KiB
TOML
59 lines
1.8 KiB
TOML
[metadata]
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creation_date = "2021/07/15"
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integration = ["o365"]
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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 = "2023/06/22"
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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
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represent an adverse 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 = ["Domain: Cloud", "Data Source: Microsoft 365", "Use Case: Configuration Audit", "Tactic: Impact"]
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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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id = "T1486"
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name = "Data Encrypted for Impact"
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reference = "https://attack.mitre.org/techniques/T1486/"
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[rule.threat.tactic]
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id = "TA0040"
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name = "Impact"
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reference = "https://attack.mitre.org/tactics/TA0040/"
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