GWorkspace - Unexpected OS update
Id | c02b0c8e-5da6-11ec-bf63-0242ac130002 |
Rulename | GWorkspace - Unexpected OS update |
Description | Detects unexpected OS update. |
Severity | Medium |
Tactics | DefenseEvasion Persistence |
Techniques | T1036 T1554 |
Required data connectors | GoogleWorkspaceReportsAPI |
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/GoogleWorkspaceReports/Analytic Rules/GWorkspaceUnexpectedOSUpdate.yaml |
Version | 1.0.2 |
Arm template | c02b0c8e-5da6-11ec-bf63-0242ac130002.json |
GWorkspaceActivityReports
| where EventMessage has "os_updated"
| where isnotempty(NeqValue) and isnotempty(OldValue)
| extend NewVersion1 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 1, NeqValue)
| extend NewVersion2 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 2, NeqValue)
| extend NewVersion3 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 3, NeqValue)
| extend OldVersion1 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 1, OldValue)
| extend OldVersion2 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 2, OldValue)
| extend OldVersion3 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 3, OldValue)
| extend NewVersion3Comparision = iff(isempty(NewVersion3), 0, tolong(NewVersion3))
| extend OldVersion3Comparision = iff(isempty(OldVersion3), 0, tolong(OldVersion3))
| extend Comparision1 = iff(tolong(NewVersion3Comparision) > tolong(OldVersion3Comparision), 'Expected version', 'Unexpected version')
| extend Comparision2 = iff(tolong(NewVersion2) > tolong(OldVersion2), 'Expected version', Comparision1)
| extend VersionCheck = iff(tolong(NewVersion1) > tolong(OldVersion1), 'Expected version', Comparision2)
| project-away NewVersion1, NewVersion2, NewVersion3, NewVersion3Comparision, OldVersion1, OldVersion2, OldVersion3, OldVersion3Comparision, Comparision1, Comparision2
| extend AccountCustomEntity = ActorEmail
name: GWorkspace - Unexpected OS update
version: 1.0.2
severity: Medium
queryFrequency: 1h
triggerOperator: gt
relevantTechniques:
- T1036
- T1554
status: Available
description: |
'Detects unexpected OS update.'
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleWorkspaceReports/Analytic Rules/GWorkspaceUnexpectedOSUpdate.yaml
requiredDataConnectors:
- connectorId: GoogleWorkspaceReportsAPI
dataTypes:
- GWorkspaceActivityReports
entityMappings:
- fieldMappings:
- identifier: Name
columnName: AccountCustomEntity
entityType: Account
tactics:
- DefenseEvasion
- Persistence
queryPeriod: 1h
query: |
GWorkspaceActivityReports
| where EventMessage has "os_updated"
| where isnotempty(NeqValue) and isnotempty(OldValue)
| extend NewVersion1 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 1, NeqValue)
| extend NewVersion2 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 2, NeqValue)
| extend NewVersion3 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 3, NeqValue)
| extend OldVersion1 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 1, OldValue)
| extend OldVersion2 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 2, OldValue)
| extend OldVersion3 = extract(@'([0-9]+)\.([0-9]+)\.?([0-9])?', 3, OldValue)
| extend NewVersion3Comparision = iff(isempty(NewVersion3), 0, tolong(NewVersion3))
| extend OldVersion3Comparision = iff(isempty(OldVersion3), 0, tolong(OldVersion3))
| extend Comparision1 = iff(tolong(NewVersion3Comparision) > tolong(OldVersion3Comparision), 'Expected version', 'Unexpected version')
| extend Comparision2 = iff(tolong(NewVersion2) > tolong(OldVersion2), 'Expected version', Comparision1)
| extend VersionCheck = iff(tolong(NewVersion1) > tolong(OldVersion1), 'Expected version', Comparision2)
| project-away NewVersion1, NewVersion2, NewVersion3, NewVersion3Comparision, OldVersion1, OldVersion2, OldVersion3, OldVersion3Comparision, Comparision1, Comparision2
| extend AccountCustomEntity = ActorEmail
kind: Scheduled
triggerThreshold: 0
id: c02b0c8e-5da6-11ec-bf63-0242ac130002
{
"$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/c02b0c8e-5da6-11ec-bf63-0242ac130002')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c02b0c8e-5da6-11ec-bf63-0242ac130002')]",
"properties": {
"alertRuleTemplateName": "c02b0c8e-5da6-11ec-bf63-0242ac130002",
"customDetails": null,
"description": "'Detects unexpected OS update.'\n",
"displayName": "GWorkspace - Unexpected OS update",
"enabled": true,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "Name"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/GoogleWorkspaceReports/Analytic Rules/GWorkspaceUnexpectedOSUpdate.yaml",
"query": "GWorkspaceActivityReports\n| where EventMessage has \"os_updated\"\n| where isnotempty(NeqValue) and isnotempty(OldValue)\n| extend NewVersion1 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 1, NeqValue)\n| extend NewVersion2 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 2, NeqValue)\n| extend NewVersion3 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 3, NeqValue)\n| extend OldVersion1 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 1, OldValue)\n| extend OldVersion2 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 2, OldValue)\n| extend OldVersion3 = extract(@'([0-9]+)\\.([0-9]+)\\.?([0-9])?', 3, OldValue)\n| extend NewVersion3Comparision = iff(isempty(NewVersion3), 0, tolong(NewVersion3))\n| extend OldVersion3Comparision = iff(isempty(OldVersion3), 0, tolong(OldVersion3))\n| extend Comparision1 = iff(tolong(NewVersion3Comparision) > tolong(OldVersion3Comparision), 'Expected version', 'Unexpected version')\n| extend Comparision2 = iff(tolong(NewVersion2) > tolong(OldVersion2), 'Expected version', Comparision1)\n| extend VersionCheck = iff(tolong(NewVersion1) > tolong(OldVersion1), 'Expected version', Comparision2)\n| project-away NewVersion1, NewVersion2, NewVersion3, NewVersion3Comparision, OldVersion1, OldVersion2, OldVersion3, OldVersion3Comparision, Comparision1, Comparision2\n| extend AccountCustomEntity = ActorEmail\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion",
"Persistence"
],
"techniques": [
"T1036",
"T1554"
],
"templateVersion": "1.0.2",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}