Detection rules › Kusto
High Number of Urgent Vulnerabilities Detected
'This Creates an incident when a host has a high number of Urgent, severity 5, vulnerabilities detected.'
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1190 Exploit Public-Facing Application |
Rule body kusto
id: 3edb7215-250b-40c0-8b46-79093949242d
name: High Number of Urgent Vulnerabilities Detected
description: |
'This Creates an incident when a host has a high number of Urgent, severity 5, vulnerabilities detected.'
severity: Medium
status: Available
requiredDataConnectors:
- connectorId: QualysVMLogsCCPDefinition
dataTypes:
- QualysHostDetection
queryFrequency: 1h
queryPeriod: 1h
triggerOperator: gt
triggerThreshold: 0
tactics:
- InitialAccess
relevantTechniques:
- T1190
query: |
let threshold = 10;
QualysHostDetection
| where Severity == "5"
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), count() by NetBios, IPAddress
| where count_ >= threshold
entityMappings:
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: NetBios
- entityType: IP
fieldMappings:
- identifier: Address
columnName: IPAddress
version: 1.0.3
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 10;
Stage 1: source
QualysHostDetection
Stage 2: where
| where Severity == "5"
Stage 3: summarize
| summarize StartTime = min(TimeGenerated), EndTime = max(TimeGenerated), count() by NetBios, IPAddress
Stage 4: where
| where count_ >= threshold
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
Output fields
Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.
| Field | Source |
|---|---|
EndTime | summarize |
IPAddress | summarize |
NetBios | summarize |
StartTime | summarize |