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P4T12ICK
76 lines
2.5 KiB
YAML
76 lines
2.5 KiB
YAML
name: Detect AzureHound File Modifications
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id: 1c34549e-c31b-11eb-996b-acde48001122
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version: 1
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date: '2021-06-01'
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author: Michael Haag, Splunk
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status: production
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type: TTP
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description: The following analytic is similar to SharpHound file modifications, but
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this instance covers the use of Invoke-AzureHound. AzureHound is the SharpHound
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equivilent but for Azure. It's possible this may never be seen in an environment
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as most attackers may execute this tool remotely. Once execution is complete, a
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zip file with a similar name will drop `20210601090751-azurecollection.zip`. In
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addition to the zip, multiple .json files will be written to disk, which are in
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the zip.
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data_source:
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- Sysmon Event ID 11
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search:
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selection1:
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Filesystem.file_name:
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- '*-azurecollection.zip'
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- '*-azprivroleadminrights.json'
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- '*-azglobaladminrights.json'
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- '*-azcloudappadmins.json'
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- '*-azapplicationadmins.json'
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condition: selection1
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how_to_implement: To successfully implement this search you need to be ingesting information
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on file modifications that include the name of the process, and file, responsible
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for the changes from your endpoints into the `Endpoint` datamodel in the `Filesystem`
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node.
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known_false_positives: False positives should be limited as the analytic is specific
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to a filename with extension .zip. Filter as needed.
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references:
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- https://posts.specterops.io/introducing-bloodhound-4-0-the-azure-update-9b2b26c5e350
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- https://raw.githubusercontent.com/BloodHoundAD/BloodHound/master/Collectors/AzureHound.ps1
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tags:
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analytic_story:
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- Discovery Techniques
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asset_type: Endpoint
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confidence: 90
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impact: 70
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message: A file - $file_name$ was written to disk that is related to AzureHound,
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a AzureAD enumeration utility, has occurred on endpoint $dest$ by user $user$.
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mitre_attack_id:
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- T1087.002
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- T1069.001
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- T1482
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- T1087.001
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- T1087
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- T1069.002
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- T1069
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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: dest
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type: Hostname
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role:
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- Victim
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- name: file_name
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type: File Name
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role:
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- Victim
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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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risk_score: 63
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security_domain: endpoint
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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/T1059.001/sharphound/windows-sysmon.log
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source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
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sourcetype: xmlwineventlog
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