Infoblox - High Threat Level Query Not Blocked Detected

Back


Id	dc7af829-d716-4774-9d6f-03d9aa7c27a4
Rulename	Infoblox - High Threat Level Query Not Blocked Detected
Description	At least 1 high threat level query generated by single host in 1 hour that is not blocked or redirected. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called InfobloxCDC.
Severity	Medium
Tactics	Impact
Techniques	T1498 T1565
Required data connectors	CefAma
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/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-HighThreatLevelQueryNotBlockedDetected.yaml
Version	1.0.4
Arm template	dc7af829-d716-4774-9d6f-03d9aa7c27a4.json

KQL

let threshold = 1;
InfobloxCDC
| where DeviceEventClassID has_cs "RPZ"
| where ThreatLevel_Score >=80
| where InfobloxB1PolicyAction == "Log" or SimplifiedDeviceAction == "PASSTHRU"
| summarize count() by SourceIP
| where count_ > threshold
| join kind=inner (InfobloxCDC
  | where DeviceEventClassID has_cs "RPZ"
  | where ThreatLevel_Score >=80
  | where InfobloxB1PolicyAction == "Log" or SimplifiedDeviceAction == "PASSTHRU"
  ) on SourceIP

YAML

queryPeriod: 1h
query: |
  let threshold = 1;
  InfobloxCDC
  | where DeviceEventClassID has_cs "RPZ"
  | where ThreatLevel_Score >=80
  | where InfobloxB1PolicyAction == "Log" or SimplifiedDeviceAction == "PASSTHRU"
  | summarize count() by SourceIP
  | where count_ > threshold
  | join kind=inner (InfobloxCDC
    | where DeviceEventClassID has_cs "RPZ"
    | where ThreatLevel_Score >=80
    | where InfobloxB1PolicyAction == "Log" or SimplifiedDeviceAction == "PASSTHRU"
    ) on SourceIP  
name: Infoblox - High Threat Level Query Not Blocked Detected
entityMappings:
- fieldMappings:
  - columnName: SourceIP
    identifier: Address
  entityType: IP
- fieldMappings:
  - columnName: DeviceName
    identifier: HostName
  - columnName: InfobloxB1SrcOSVersion
    identifier: OSVersion
  - columnName: SourceUserName
    identifier: FullName
  entityType: Host
- fieldMappings:
  - columnName: DestinationDnsDomain
    identifier: DomainName
  entityType: DNS
- fieldMappings:
  - columnName: ThreatProperty
    identifier: Name
  - columnName: ThreatClass
    identifier: Category
  entityType: Malware
queryFrequency: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Infoblox Cloud Data Connector/Analytic Rules/Infoblox-HighThreatLevelQueryNotBlockedDetected.yaml
requiredDataConnectors:
- connectorId: CefAma
  dataTypes:
  - CommonSecurityLog
description: |
    'At least 1 high threat level query generated by single host in 1 hour that is not blocked or redirected. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called [**InfobloxCDC**](https://aka.ms/sentinel-InfobloxCloudDataConnector-parser).'
kind: Scheduled
incidentConfiguration:
  createIncident: true
version: 1.0.4
eventGroupingSettings:
  aggregationKind: SingleAlert
status: Available
severity: Medium
relevantTechniques:
- T1498
- T1565
triggerOperator: gt
triggerThreshold: 0
customDetails:
  InfobloxB1Network: InfobloxB1Network
  InfobloxB1FeedName: InfobloxB1FeedName
  InfobloxB1PolicyName: InfobloxB1PolicyName
  InfobloxB1Action: InfobloxB1PolicyAction
  SourceMACAddress: SourceMACAddress
tactics:
- Impact
id: dc7af829-d716-4774-9d6f-03d9aa7c27a4

ARM