mirror of
https://github.com/splunk/security_content
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Bhavin Patel
74 lines
2.9 KiB
YAML
74 lines
2.9 KiB
YAML
name: Azure AD Successful PowerShell Authentication
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id: 62f10052-d7b3-4e48-b57b-56f8e3ac7ceb
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version: 2
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date: '2023-12-20'
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author: Mauricio Velazco, Gowthamaraj Rajendran, Splunk
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status: production
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type: TTP
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description: The following analytic identifies a successful authentication event against
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an Azure AD tenant using PowerShell commandlets. This behavior is not common for
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regular, non administrative users. After compromising an account in Azure AD, attackers
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and red teams alike will perform enumeration and discovery techniques. One method
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of executing these techniques is leveraging the native PowerShell modules.
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data_source: []
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search: ' `azure_monitor_aad` category=SignInLogs properties.authenticationDetails{}.succeeded=true properties.appDisplayName="Microsoft Azure PowerShell"
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| rename properties.* as *
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| stats count min(_time) as firstTime max(_time) as lastTime values(user) as user by src_ip, appDisplayName, user_agent
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| `security_content_ctime(firstTime)`
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| `security_content_ctime(lastTime)`
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| `azure_ad_successful_powershell_authentication_filter`'
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how_to_implement: You must install the latest version of Splunk Add-on for Microsoft
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Cloud Services from Splunkbase (https://splunkbase.splunk.com/app/3110/#/details).
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You must be ingesting Azure Active Directory events into your Splunk environment through an EventHub.
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This analytic was written to be used with the azure:monitor:aad sourcetype leveraging the Signin log category.
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known_false_positives: Administrative users will likely use PowerShell commandlets
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to troubleshoot and maintain the environment. Filter as needed.
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references:
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- https://attack.mitre.org/techniques/T1078/004/
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- https://docs.microsoft.com/en-us/powershell/module/azuread/connect-azuread?view=azureadps-2.0
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- https://securitycafe.ro/2022/04/29/pentesting-azure-recon-techniques/
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- https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Methodology%20and%20Resources/Cloud%20-%20Azure%20Pentest.md
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tags:
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analytic_story:
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- Azure Active Directory Account Takeover
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asset_type: Azure Active Directory
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confidence: 90
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impact: 60
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message: Successful authentication for user $user$
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using PowerShell.
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mitre_attack_id:
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- T1586
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- T1586.003
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- T1078
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- T1078.004
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observable:
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- name: user
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type: User
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role:
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- Victim
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- name: src_ip
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type: IP Address
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role:
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- Attacker
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product:
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- Splunk Enterprise
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- Splunk Enterprise Security
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- Splunk Cloud
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required_fields:
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- _time
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- properties.appDisplayName
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- category
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- user
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- src_ip
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- properties.appDisplayName
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- properties.userAgent
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risk_score: 54
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security_domain: identity
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tests:
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- name: True Positive Test
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attack_data:
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- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078.004/azuread_pws/azure-audit.log
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source: Azure AD
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sourcetype: azure:monitor:aad
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update_timestamp: true
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