Azure DevOps PAT used with Browser
Id | 5f0d80db-3415-4265-9d52-8466b7372e3a |
Rulename | Azure DevOps PAT used with Browser |
Description | Personal Access Tokens (PATs) are used as an alternate password to authenticate into Azure DevOps. PATs are intended for programmatic access use in code or applications. This can be prone to attacker theft if not adequately secured. This query looks for the use of a PAT in authentication but from a User Agent indicating a browser. This should not be normal activity and could be an indicator of an attacker using a stolen PAT. |
Severity | Medium |
Tactics | CredentialAccess |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/ADOPATUsedWithBrowser.yaml |
Version | 1.0.4 |
Arm template | 5f0d80db-3415-4265-9d52-8466b7372e3a.json |
AzureDevOpsAuditing
| where AuthenticationMechanism startswith "PAT"
// Look for useragents that include a redenring engine
| where UserAgent has_any ("Gecko", "WebKit", "Presto", "Trident", "EdgeHTML", "Blink")
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
queryPeriod: 1d
tactics:
- CredentialAccess
requiredDataConnectors: []
triggerThreshold: 0
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: ActorUPN
- identifier: Name
columnName: AccountName
- identifier: UPNSuffix
columnName: AccountUPNSuffix
entityType: Account
- fieldMappings:
- identifier: Address
columnName: IpAddress
entityType: IP
name: Azure DevOps PAT used with Browser
status: Available
query: |
AzureDevOpsAuditing
| where AuthenticationMechanism startswith "PAT"
// Look for useragents that include a redenring engine
| where UserAgent has_any ("Gecko", "WebKit", "Presto", "Trident", "EdgeHTML", "Blink")
| extend AccountName = tostring(split(ActorUPN, "@")[0]), AccountUPNSuffix = tostring(split(ActorUPN, "@")[1])
queryFrequency: 1d
id: 5f0d80db-3415-4265-9d52-8466b7372e3a
severity: Medium
description: |
'Personal Access Tokens (PATs) are used as an alternate password to authenticate into Azure DevOps. PATs are intended for programmatic access use in code or applications.
This can be prone to attacker theft if not adequately secured. This query looks for the use of a PAT in authentication but from a User Agent indicating a browser.
This should not be normal activity and could be an indicator of an attacker using a stolen PAT.'
version: 1.0.4
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/AzureDevOpsAuditing/Analytic Rules/ADOPATUsedWithBrowser.yaml
kind: Scheduled
triggerOperator: gt
{
"$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/5f0d80db-3415-4265-9d52-8466b7372e3a')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/5f0d80db-3415-4265-9d52-8466b7372e3a')]",
"properties": {
"alertRuleTemplateName": "5f0d80db-3415-4265-9d52-8466b7372e3a",
"customDetails": null,
"description": "'Personal Access Tokens (PATs) are used as an alternate password to authenticate into Azure DevOps. PATs are intended for programmatic access use in code or applications. \nThis can be prone to attacker theft if not adequately secured. This query looks for the use of a PAT in authentication but from a User Agent indicating a browser. \nThis should not be normal activity and could be an indicator of an attacker using a stolen PAT.'\n",
"displayName": "Azure DevOps PAT used with Browser",
"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/ADOPATUsedWithBrowser.yaml",
"query": "AzureDevOpsAuditing\n| where AuthenticationMechanism startswith \"PAT\"\n// Look for useragents that include a redenring engine\n| where UserAgent has_any (\"Gecko\", \"WebKit\", \"Presto\", \"Trident\", \"EdgeHTML\", \"Blink\")\n| extend AccountName = tostring(split(ActorUPN, \"@\")[0]), AccountUPNSuffix = tostring(split(ActorUPN, \"@\")[1])\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"severity": "Medium",
"status": "Available",
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"CredentialAccess"
],
"templateVersion": "1.0.4",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}