NRT Azure DevOps Audit Stream Disabled
Id | 74ed028d-e392-40b7-baef-e69627bf89d1 |
Rulename | 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 |
Tactics | DefenseEvasion |
Techniques | T1562.008 |
Kind | NRT |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/NRT_ADOAuditStreamDisabled.yaml |
Version | 1.0.2 |
Arm template | 74ed028d-e392-40b7-baef-e69627bf89d1.json |
AzureDevOpsAuditing
| 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])
relevantTechniques:
- T1562.008
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/NRT_ADOAuditStreamDisabled.yaml
kind: NRT
entityMappings:
- fieldMappings:
- columnName: ActorUPN
identifier: FullName
- columnName: AccountName
identifier: Name
- columnName: AccountUPNSuffix
identifier: UPNSuffix
entityType: Account
- fieldMappings:
- columnName: IpAddress
identifier: Address
entityType: IP
requiredDataConnectors: []
status: Available
query: |
AzureDevOpsAuditing
| 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])
tactics:
- DefenseEvasion
severity: High
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.'
version: 1.0.2
id: 74ed028d-e392-40b7-baef-e69627bf89d1
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2023-02-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/74ed028d-e392-40b7-baef-e69627bf89d1')]",
"kind": "NRT",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/74ed028d-e392-40b7-baef-e69627bf89d1')]",
"properties": {
"alertRuleTemplateName": "74ed028d-e392-40b7-baef-e69627bf89d1",
"customDetails": null,
"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 \n 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 \n its unlikely to have a high false positive rate.'\n",
"displayName": "NRT Azure DevOps Audit Stream Disabled",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "ActorUPN",
"identifier": "FullName"
},
{
"columnName": "AccountName",
"identifier": "Name"
},
{
"columnName": "AccountUPNSuffix",
"identifier": "UPNSuffix"
}
]
},
{
"entityType": "IP",
"fieldMappings": [
{
"columnName": "IpAddress",
"identifier": "Address"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/NRT_ADOAuditStreamDisabled.yaml",
"query": "AzureDevOpsAuditing\n| where OperationName =~ \"AuditLog.StreamDisabledByUser\"\n| extend StreamType = tostring(Data.ConsumerType)\n| project-reorder TimeGenerated, Details, ActorUPN, IpAddress, UserAgent, StreamType\n| extend timestamp = TimeGenerated\n| extend AccountName = tostring(split(ActorUPN, \"@\")[0]), AccountUPNSuffix = tostring(split(ActorUPN, \"@\")[1])\n",
"severity": "High",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": [
"T1562"
],
"templateVersion": "1.0.2"
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}