Azure DevOps Service Connection Abuse
Id | d564ff12-8f53-41b8-8649-44f76b37b99f |
Rulename | Azure DevOps Service Connection Abuse |
Description | Flags builds/releases that use a large number of service connections if they aren’t manually in the allow list. This is to determine if someone is hijacking a build/release and adding many service connections in order to abuse or dump credentials from service connections. |
Severity | Medium |
Tactics | Persistence Impact |
Techniques | T1098 T1496 |
Kind | Scheduled |
Query frequency | 1d |
Query period | 14d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/AzDOServiceConnectionUsage.yaml |
Version | 1.0.5 |
Arm template | d564ff12-8f53-41b8-8649-44f76b37b99f.json |
// How many greater than Service Connections you want to view per build/release
let ServiceConnectionThreshold = 4;
let BypassDefIds = datatable(DefId:string, Type:string, ProjectName:string)
[
//"103", "Release", "ProjectA",
//"42", "Release", "ProjectB",
//"122", "Build", "ProjectB"
];
AzureDevOpsAuditing
| where OperationName == "Library.ServiceConnectionExecuted"
| extend DefId = tostring(Data.DefinitionId), Type = tostring(Data.PlanType), ConnectionId = tostring(Data.ConnectionId)
| parse ScopeDisplayName with OrganizationName ' (Organization)'
| summarize CurrentCount = dcount(tostring(ConnectionId)), ConnectionNames = make_set(tostring(Data.ConnectionName)), StartTime = min(TimeGenerated), EndTime = max(TimeGenerated)
by OrganizationName, tostring(DefId), tostring(Type), ProjectId, ProjectName, ActorUPN, IpAddress
| where CurrentCount > ServiceConnectionThreshold
| join kind=anti BypassDefIds on $left.DefId==$right.DefId and $left.Type == $right.Type and $left.ProjectName == $right.ProjectName
| extend link = iif(
Type == "Build", strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_build?definitionId=', DefId),
strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_release?_a=releases&view=mine&definitionId=', DefId))
| extend timestamp = StartTime
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
name: Azure DevOps Service Connection Abuse
version: 1.0.5
severity: Medium
queryFrequency: 1d
triggerOperator: gt
relevantTechniques:
- T1098
- T1496
status: Available
description: |
'Flags builds/releases that use a large number of service connections if they aren't manually in the allow list.
This is to determine if someone is hijacking a build/release and adding many service connections in order to abuse or dump credentials from service connections.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/AzDOServiceConnectionUsage.yaml
requiredDataConnectors: []
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: ActorUPN
- identifier: Name
columnName: AccountName
- identifier: UPNSuffix
columnName: AccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: Address
columnName: IpAddress
entityType: IP
tactics:
- Persistence
- Impact
queryPeriod: 14d
query: |
// How many greater than Service Connections you want to view per build/release
let ServiceConnectionThreshold = 4;
let BypassDefIds = datatable(DefId:string, Type:string, ProjectName:string)
[
//"103", "Release", "ProjectA",
//"42", "Release", "ProjectB",
//"122", "Build", "ProjectB"
];
AzureDevOpsAuditing
| where OperationName == "Library.ServiceConnectionExecuted"
| extend DefId = tostring(Data.DefinitionId), Type = tostring(Data.PlanType), ConnectionId = tostring(Data.ConnectionId)
| parse ScopeDisplayName with OrganizationName ' (Organization)'
| summarize CurrentCount = dcount(tostring(ConnectionId)), ConnectionNames = make_set(tostring(Data.ConnectionName)), StartTime = min(TimeGenerated), EndTime = max(TimeGenerated)
by OrganizationName, tostring(DefId), tostring(Type), ProjectId, ProjectName, ActorUPN, IpAddress
| where CurrentCount > ServiceConnectionThreshold
| join kind=anti BypassDefIds on $left.DefId==$right.DefId and $left.Type == $right.Type and $left.ProjectName == $right.ProjectName
| extend link = iif(
Type == "Build", strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_build?definitionId=', DefId),
strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_release?_a=releases&view=mine&definitionId=', DefId))
| extend timestamp = StartTime
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
kind: Scheduled
triggerThreshold: 0
id: d564ff12-8f53-41b8-8649-44f76b37b99f
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"apiVersion": "2024-01-01-preview",
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/d564ff12-8f53-41b8-8649-44f76b37b99f')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/d564ff12-8f53-41b8-8649-44f76b37b99f')]",
"properties": {
"alertRuleTemplateName": "d564ff12-8f53-41b8-8649-44f76b37b99f",
"customDetails": null,
"description": "'Flags builds/releases that use a large number of service connections if they aren't manually in the allow list.\nThis is to determine if someone is hijacking a build/release and adding many service connections in order to abuse or dump credentials from service connections.'\n",
"displayName": "Azure DevOps Service Connection Abuse",
"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/AzDOServiceConnectionUsage.yaml",
"query": "// How many greater than Service Connections you want to view per build/release\nlet ServiceConnectionThreshold = 4;\nlet BypassDefIds = datatable(DefId:string, Type:string, ProjectName:string)\n[\n//\"103\", \"Release\", \"ProjectA\",\n//\"42\", \"Release\", \"ProjectB\",\n//\"122\", \"Build\", \"ProjectB\"\n];\nAzureDevOpsAuditing\n| where OperationName == \"Library.ServiceConnectionExecuted\"\n| extend DefId = tostring(Data.DefinitionId), Type = tostring(Data.PlanType), ConnectionId = tostring(Data.ConnectionId)\n| parse ScopeDisplayName with OrganizationName ' (Organization)'\n| summarize CurrentCount = dcount(tostring(ConnectionId)), ConnectionNames = make_set(tostring(Data.ConnectionName)), StartTime = min(TimeGenerated), EndTime = max(TimeGenerated)\n by OrganizationName, tostring(DefId), tostring(Type), ProjectId, ProjectName, ActorUPN, IpAddress\n| where CurrentCount > ServiceConnectionThreshold\n| join kind=anti BypassDefIds on $left.DefId==$right.DefId and $left.Type == $right.Type and $left.ProjectName == $right.ProjectName\n| extend link = iif(\n Type == \"Build\", strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_build?definitionId=', DefId),\n strcat('https://dev.azure.com/', OrganizationName, '/', ProjectName, '/_release?_a=releases&view=mine&definitionId=', DefId))\n| extend timestamp = StartTime\n| extend AccountName = tostring(split(ActorUPN, \"@\")[0]), AccountUPNSuffix = tostring(split(ActorUPN, \"@\")[1])\n",
"queryFrequency": "P1D",
"queryPeriod": "P14D",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact",
"Persistence"
],
"techniques": [
"T1098",
"T1496"
],
"templateVersion": "1.0.5",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}