Detection rules › Kusto
Infoblox - Many High Threat Level Queries From Single Host Detected
'At least 200 high threat level queries generated by single host in 1 hour. Queries do not need to be the same. Customize query count, scheduling, responses and more. This rule depends on a parser based on a Kusto Function to work as expected called InfobloxCDC.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Impact |
Rule body
id: 3822b794-fa89-4420-aad6-0e1a2307f419
name: Infoblox - Many High Threat Level Queries From Single Host Detected
description: |
'At least 200 high threat level queries generated by single host in 1 hour. Queries do not need to be the same. 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).'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: CefAma
dataTypes:
- CommonSecurityLog
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- Impact
relevantTechniques:
- T1498
- T1565
query: |
let threshold = 200;
InfobloxCDC
| where DeviceEventClassID has_cs "RPZ"
| where ThreatLevel_Score >= 80
| summarize count() by SourceIP
| where count_ > threshold
| join kind=inner (InfobloxCDC
| where DeviceEventClassID has_cs "RPZ"
| where ThreatLevel_Score >= 80
) on SourceIP
entityMappings:
- entityType: IP
fieldMappings:
- identifier: Address
columnName: SourceIP
- entityType: Host
fieldMappings:
- identifier: HostName
columnName: DeviceName
- identifier: OSVersion
columnName: InfobloxB1SrcOSVersion
- identifier: FullName
columnName: SourceUserName
customDetails:
SourceMACAddress: SourceMACAddress
eventGroupingSettings:
aggregationKind: SingleAlert
incidentConfiguration:
createIncident: true
version: 1.0.3
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 200;
Stage 1: source
InfobloxCDC
Stage 2: where
| where DeviceEventClassID has_cs "RPZ"
Stage 3: where
| where ThreatLevel_Score >= 80
Stage 4: summarize
| summarize count() by SourceIP
Stage 5: where
| where count_ > threshold
Stage 6: join
| join kind=inner (InfobloxCDC
| where DeviceEventClassID has_cs "RPZ"
| where ThreatLevel_Score >= 80
) on SourceIP
Indicators
These rows show field, operator, and value matches.
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
SourceIP | summarize |