Azure Application Security Group Modified or Deleted

Identifies when a application security group is modified or deleted.

Sigma rule (View on GitHub)

 1title: Azure Application Security Group Modified or Deleted
 2id: 835747f1-9329-40b5-9cc3-97d465754ce6
 3status: test
 4description: Identifies when a application security group is modified or deleted.
 5references:
 6    - https://learn.microsoft.com/en-us/azure/role-based-access-control/resource-provider-operations
 7author: Austin Songer
 8date: 2021/08/16
 9modified: 2022/08/23
10tags:
11    - attack.impact
12logsource:
13    product: azure
14    service: activitylogs
15detection:
16    selection:
17        operationName:
18            - MICROSOFT.NETWORK/APPLICATIONSECURITYGROUPS/WRITE
19            - MICROSOFT.NETWORK/APPLICATIONSECURITYGROUPS/DELETE
20    condition: selection
21falsepositives:
22    - Application security group being modified or deleted may be performed by a system administrator.
23    - Verify whether the user identity, user agent, and/or hostname should be making changes in your environment.
24    - Application security group modified or deleted from unfamiliar users should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
25level: medium

References

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