58 lines
2.1 KiB
TOML
58 lines
2.1 KiB
TOML
|
[metadata]
|
|||
|
|
creation_date = "2020/08/17"
|
|||
|
|
ecs_version = ["1.6.0"]
|
|||
|
|
maturity = "production"
|
|||
|
|
updated_date = "2020/08/17"
|
|||
|
|
|
|||
|
|
[rule]
|
|||
|
|
author = ["Elastic"]
|
|||
|
|
description = """
|
|||
|
|
Identifies command execution on a virtual machine (VM) in Azure. A Virtual Machine Contributor role lets you manage
|
|||
|
|
virtual machines, but not access them, nor access the virtual network or storage account they’re connected to.
|
|||
|
|
However, commands can be run via PowerShell on the VM, which execute as System. Other roles, such as certain
|
|||
|
|
Administrator roles may be able to execute commands on a VM as well.
|
|||
|
|
"""
|
|||
|
|
false_positives = [
|
|||
|
|
"""
|
|||
|
|
Command execution on a virtual machine 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. Command execution 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-*"]
|
|||
|
|
language = "kuery"
|
|||
|
|
license = "Elastic License"
|
|||
|
|
name = "Azure Command Execution on Virtual Machine"
|
|||
|
|
note = "The Azure Filebeat module must be enabled to use this rule."
|
|||
|
|
references = [
|
|||
|
|
"https://adsecurity.org/?p=4277",
|
|||
|
|
"https://posts.specterops.io/attacking-azure-azure-ad-and-introducing-powerzure-ca70b330511a",
|
|||
|
|
"https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#virtual-machine-contributor",
|
|||
|
|
]
|
|||
|
|
risk_score = 47
|
|||
|
|
rule_id = "60884af6-f553-4a6c-af13-300047455491"
|
|||
|
|
severity = "medium"
|
|||
|
|
tags = ["Azure", "Elastic", "SecOps", "Continuous Monitoring", "Logging"]
|
|||
|
|
type = "query"
|
|||
|
|
|
|||
|
|
query = '''
|
|||
|
|
event.module:azure and event.dataset:azure.activitylogs and event.category:Administrative and azure.activitylogs.operation_name:MICROSOFT.COMPUTE/VIRTUALMACHINES/RUNCOMMAND/ACTION and event.outcome:Success
|
|||
|
|
'''
|
|||
|
|
|
|||
|
|
|
|||
|
|
[[rule.threat]]
|
|||
|
|
framework = "MITRE ATT&CK"
|
|||
|
|
[[rule.threat.technique]]
|
|||
|
|
id = "T1059"
|
|||
|
|
name = "Command-Line Interface"
|
|||
|
|
reference = "https://attack.mitre.org/techniques/T1059/"
|
|||
|
|
|
|||
|
|
|
|||
|
|
[rule.threat.tactic]
|
|||
|
|
id = "TA0002"
|
|||
|
|
name = "Execution"
|
|||
|
|
reference = "https://attack.mitre.org/tactics/TA0002/"
|
|||
|
|
|