Brent Murphy
627610401c
* update azure indicies * remove . in index to match prior cloud rules * update o365 indicies * add event.dataset:google_workspace.admin to existing google workspace rules * gcp syntax * add gcp index * update gcp index * update index patterns for google workspace rules * update gcp index2 * update updated_date * update event outcome for azure Co-authored-by: David French <56409778+threat-punter@users.noreply.github.com>
57 lines
2.1 KiB
TOML
57 lines
2.1 KiB
TOML
[metadata]
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creation_date = "2020/08/17"
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maturity = "production"
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updated_date = "2020/12/15"
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[rule]
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author = ["Elastic"]
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description = """
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Identifies command execution on a virtual machine (VM) in Azure. A Virtual Machine Contributor role lets you manage
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virtual machines, but not access them, nor access the virtual network or storage account they’re connected to. However,
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commands can be run via PowerShell on the VM, which execute as System. Other roles, such as certain Administrator roles
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may be able to execute commands on a VM as well.
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"""
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false_positives = [
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"""
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Command execution on a virtual machine may be done by a system or network administrator. Verify whether the
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username, hostname, and/or resource name should be making changes in your environment. Command execution from
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unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted
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from the rule.
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""",
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]
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from = "now-25m"
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index = ["filebeat-*", "logs-azure*"]
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language = "kuery"
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license = "Elastic License"
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name = "Azure Command Execution on Virtual Machine"
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note = "The Azure Filebeat module must be enabled to use this rule."
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references = [
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"https://adsecurity.org/?p=4277",
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"https://posts.specterops.io/attacking-azure-azure-ad-and-introducing-powerzure-ca70b330511a",
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"https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles#virtual-machine-contributor",
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]
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risk_score = 47
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rule_id = "60884af6-f553-4a6c-af13-300047455491"
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severity = "medium"
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tags = ["Elastic", "Cloud", "Azure", "Continuous Monitoring", "SecOps", "Log Auditing"]
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type = "query"
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query = '''
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event.dataset:azure.activitylogs and azure.activitylogs.operation_name:MICROSOFT.COMPUTE/VIRTUALMACHINES/RUNCOMMAND/ACTION and event.outcome:(Success or 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 = "T1059"
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name = "Command and Scripting Interpreter"
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reference = "https://attack.mitre.org/techniques/T1059/"
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[rule.threat.tactic]
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id = "TA0002"
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name = "Execution"
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reference = "https://attack.mitre.org/tactics/TA0002/"
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