ADOAuditLogs
| where OperationName =~ "AuditLog.StreamDisabledByUser"
| extend StreamType = tostring(Data.ConsumerType)
| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType
| extend timestamp = TimeGenerated
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
id: 74ed028d-e392-40b7-baef-e69627bf89d1
description: |
'Azure DevOps allow for audit logs to be streamed to external storage solutions such as SIEM solutions. An attacker looking to hide malicious Azure DevOps activity from defenders may look to disable data streams before conducting activity and then re-enabling the stream after (so as not to raise data threshold-based alarms). Looking for disabled audit streams can identify this activity, and due to the nature of the action its unlikely to have a high false positive rate.'
requiredDataConnectors: []
version: 1.0.4
severity: High
tactics:
- DefenseEvasion
kind: NRT
entityMappings:
- entityType: Account
fieldMappings:
- columnName: ActorUPN
identifier: FullName
- columnName: AccountName
identifier: Name
- columnName: AccountUPNSuffix
identifier: UPNSuffix
- entityType: IP
fieldMappings:
- columnName: IpAddress
identifier: Address
name: NRT Azure DevOps Audit Stream Disabled
relevantTechniques:
- T1562.008
query: |
ADOAuditLogs
| where OperationName =~ "AuditLog.StreamDisabledByUser"
| extend StreamType = tostring(Data.ConsumerType)
| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType
| extend timestamp = TimeGenerated
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
status: Available
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/NRT_ADOAuditStreamDisabled.yaml
