[metadata]
creation_date = "2020/08/17"
maturity = "production"
updated_date = "2020/12/15"

[rule]
author = ["Elastic"]
description = """
Identifies the deletion of diagnostic settings in Azure, which send platform logs and metrics to different destinations.
An adversary may delete diagnostic settings in an attempt to evade defenses.
"""
false_positives = [
    """
    Deletion of diagnostic settings may be done by a system or network administrator. Verify whether the username,
    hostname, and/or resource name should be making changes in your environment. Diagnostic settings deletion from
    unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted
    from the rule.
    """,
]
from = "now-25m"
index = ["filebeat-*", "logs-azure*"]
language = "kuery"
license = "Elastic License"
name = "Azure Diagnostic Settings Deletion"
note = "The Azure Filebeat module must be enabled to use this rule."
references = ["https://docs.microsoft.com/en-us/azure/azure-monitor/platform/diagnostic-settings"]
risk_score = 47
rule_id = "5370d4cd-2bb3-4d71-abf5-1e1d0ff5a2de"
severity = "medium"
tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Monitoring"]
type = "query"

query = '''
event.dataset:azure.activitylogs and azure.activitylogs.operation_name:MICROSOFT.INSIGHTS/DIAGNOSTICSETTINGS/DELETE and event.outcome:(Success or success)
'''


[[rule.threat]]
framework = "MITRE ATT&CK"
[[rule.threat.technique]]
id = "T1562"
name = "Impair Defenses"
reference = "https://attack.mitre.org/techniques/T1562/"
[[rule.threat.technique.subtechnique]]
id = "T1562.001"
name = "Disable or Modify Tools"
reference = "https://attack.mitre.org/techniques/T1562/001/"


[rule.threat.tactic]
id = "TA0005"
name = "Defense Evasion"
reference = "https://attack.mitre.org/tactics/TA0005/"

