Zscaler - Unexpected update operation
Id | 672e2846-4226-11ec-81d3-0242ac130003 |
Rulename | Zscaler - Unexpected update operation |
Description | Detects unexpected version of update operation. |
Severity | Medium |
Tactics | InitialAccess |
Techniques | T1190 T1133 |
Required data connectors | CustomLogsAma ZscalerPrivateAccess |
Kind | Scheduled |
Query frequency | 1h |
Query period | 1h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Zscaler Private Access (ZPA)/Analytic Rules/ZscalerUnexpectedUpdateOperation.yaml |
Version | 1.0.1 |
Arm template | 672e2846-4226-11ec-81d3-0242ac130003.json |
ZPAEvent
| where isnotempty(AuditOperationType)
| extend ExpectedVersion1 = extract(@'(expectedVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 2, AuditOldValue)
| extend ExpectedVersion2 = extract(@'(expectedVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 3, AuditOldValue)
| extend NewVersion1 = extract(@'("currentVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 2, AuditNewValue)
| extend NewVersion2 = extract(@'("currentVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 3, AuditNewValue)
| extend Comparision1 = iff(tolong(ExpectedVersion2) > tolong(NewVersion2), 'Unexpected version', 'Expected version')
| extend VersionCheck = iff(tolong(ExpectedVersion1) > tolong(NewVersion1), 'Unexpected version', Comparision1)
| project-away ExpectedVersion1, ExpectedVersion2, NewVersion1, NewVersion2, Comparision1
| extend ProcessCustomEntity = AuditOperationType
name: Zscaler - Unexpected update operation
version: 1.0.1
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1190
- T1133
status: Available
description: |
'Detects unexpected version of update operation.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Zscaler Private Access (ZPA)/Analytic Rules/ZscalerUnexpectedUpdateOperation.yaml
requiredDataConnectors:
- connectorId: ZscalerPrivateAccess
dataTypes:
- ZPAEvent
- connectorId: CustomLogsAma
datatypes:
- ZPA_CL
entityMappings:
- fieldMappings:
- identifier: ProcessId
columnName: ProcessCustomEntity
entityType: Process
tactics:
- InitialAccess
queryPeriod: 1h
query: |
ZPAEvent
| where isnotempty(AuditOperationType)
| extend ExpectedVersion1 = extract(@'(expectedVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 2, AuditOldValue)
| extend ExpectedVersion2 = extract(@'(expectedVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 3, AuditOldValue)
| extend NewVersion1 = extract(@'("currentVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 2, AuditNewValue)
| extend NewVersion2 = extract(@'("currentVersion":")([0-9]+)\.([0-9]+\.[0-9]+)', 3, AuditNewValue)
| extend Comparision1 = iff(tolong(ExpectedVersion2) > tolong(NewVersion2), 'Unexpected version', 'Expected version')
| extend VersionCheck = iff(tolong(ExpectedVersion1) > tolong(NewVersion1), 'Unexpected version', Comparision1)
| project-away ExpectedVersion1, ExpectedVersion2, NewVersion1, NewVersion2, Comparision1
| extend ProcessCustomEntity = AuditOperationType
kind: Scheduled
triggerThreshold: 0
id: 672e2846-4226-11ec-81d3-0242ac130003
{
"$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/672e2846-4226-11ec-81d3-0242ac130003')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/672e2846-4226-11ec-81d3-0242ac130003')]",
"properties": {
"alertRuleTemplateName": "672e2846-4226-11ec-81d3-0242ac130003",
"customDetails": null,
"description": "'Detects unexpected version of update operation.'\n",
"displayName": "Zscaler - Unexpected update operation",
"enabled": true,
"entityMappings": [
{
"entityType": "Process",
"fieldMappings": [
{
"columnName": "ProcessCustomEntity",
"identifier": "ProcessId"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Zscaler Private Access (ZPA)/Analytic Rules/ZscalerUnexpectedUpdateOperation.yaml",
"query": "ZPAEvent\n| where isnotempty(AuditOperationType)\n| extend ExpectedVersion1 = extract(@'(expectedVersion\":\")([0-9]+)\\.([0-9]+\\.[0-9]+)', 2, AuditOldValue)\n| extend ExpectedVersion2 = extract(@'(expectedVersion\":\")([0-9]+)\\.([0-9]+\\.[0-9]+)', 3, AuditOldValue)\n| extend NewVersion1 = extract(@'(\"currentVersion\":\")([0-9]+)\\.([0-9]+\\.[0-9]+)', 2, AuditNewValue)\n| extend NewVersion2 = extract(@'(\"currentVersion\":\")([0-9]+)\\.([0-9]+\\.[0-9]+)', 3, AuditNewValue)\n| extend Comparision1 = iff(tolong(ExpectedVersion2) > tolong(NewVersion2), 'Unexpected version', 'Expected version')\n| extend VersionCheck = iff(tolong(ExpectedVersion1) > tolong(NewVersion1), 'Unexpected version', Comparision1)\n| project-away ExpectedVersion1, ExpectedVersion2, NewVersion1, NewVersion2, Comparision1\n| extend ProcessCustomEntity = AuditOperationType\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1133",
"T1190"
],
"templateVersion": "1.0.1",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}