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Merged
aprakash13 merged 1 commit into from
Jun 14, 2022
Merged

Adding new NRT rule #5283

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29 changes: 29 additions & 0 deletions Detections/AzureDevOpsAuditing/NRT_ADOAuditStreamDisabled.yaml
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id: 74ed028d-e392-40b7-baef-e69627bf89d1
name: NRT Azure DevOps Audit Stream Disabled
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.'
severity: High
requiredDataConnectors: []
tactics:
- DefenseEvasion
relevantTechniques:
- T1562.008
query: |
AzureDevOpsAuditing
| where OperationName =~ "AuditLog.StreamDisabledByUser"
| extend StreamType = tostring(Data.ConsumerType)
| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType
| extend timestamp = TimeGenerated, AccountCustomEntity = ActorUPN, IPCustomEntity = IpAddress
entityMappings:
- entityType: Account
fieldMappings:
- identifier: FullName
columnName: AccountCustomEntity
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPCustomEntity
version: 1.0.0
kind: NRT