defense_evasion_firewall_policy_deletion.toml

[metadata]
creation_date = "2020/08/18"
integration = ["azure"]
maturity = "production"
updated_date = "2024/05/21"

[rule]
author = ["Elastic"]
description = """
Identifies the deletion of a firewall policy in Azure. An adversary may delete a firewall policy in an attempt to evade
defenses and/or to eliminate barriers to their objective.
"""
false_positives = [
    """
    Firewall policy deletions 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. Firewall policy deletions by 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 v2"
name = "Azure Firewall Policy Deletion"
note = """## Setup

The Azure Fleet integration, Filebeat module, or similarly structured data is required to be compatible with this rule."""
references = ["https://docs.microsoft.com/en-us/azure/firewall-manager/policy-overview"]
risk_score = 21
rule_id = "e02bd3ea-72c6-4181-ac2b-0f83d17ad969"
severity = "low"
tags = [
    "Domain: Cloud",
    "Data Source: Azure",
    "Use Case: Network Security Monitoring",
    "Tactic: Defense Evasion",
]
timestamp_override = "event.ingested"
type = "query"

query = '''
event.dataset:azure.activitylogs and azure.activitylogs.operation_name:"MICROSOFT.NETWORK/FIREWALLPOLICIES/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/"