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mvelazco
71 lines
2.8 KiB
YAML
71 lines
2.8 KiB
YAML
name: Azure AD Successful PowerShell Authentication
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id: 62f10052-d7b3-4e48-b57b-56f8e3ac7ceb
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version: 1
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date: '2022-07-13'
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author: Mauricio Velazco, Splunk
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type: TTP
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datamodel: []
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description: 'The following analytic identifies a successful authentication event against an Azure AD tenant using PowerShell commandlets. This behavior is not common for regular,
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non administrative users. After compromising an account in Azure AD, attackers and red teams alike will perform enumeration and discovery techniques.
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One method of executing these techniques is leveraging the native PowerShell modules.'
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search: ' `azuread` body.category=SignInLogs body.properties.authenticationDetails{}.succeeded=true body.properties.appDisplayName="Azure Active Directory PowerShell"
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| rename body.properties.* as *
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| stats values(userPrincipalName) by _time, ipAddress, appDisplayName, userAgent
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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 Cloud Services from Splunkbase(https://splunkbase.splunk.com/app/3110/#/details). You must be ingesting Azure Active Directory events in your Splunk environment. Specifically, this analytic leverages the SignInLogs
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log category.
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known_false_positives: Administrative users will likely use PowerShell commandlets 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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cis20:
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- CIS 3
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- CIS 5
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- CIS 16
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confidence: 90
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context:
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- Source:Cloud Data
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- Stage:Initial Access
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dataset:
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- https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1078.004/azuread_pws/azure-audit.log
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impact: 60
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kill_chain_phases:
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- Exploitation
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message: Successful authentication for user $body.properties.userPrincipalName$ 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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nist:
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- DE.CM
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observable:
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- name: userPrincipalName
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type: User
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role:
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- Victim
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- name: ipAddress
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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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- body.properties.appDisplayName
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- body.category
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- body.properties.userPrincipalName
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- body.properties.ipAddress
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- body.properties.appDisplayName
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- body.properties.userAgent
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risk_score: 54
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security_domain: identity
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